diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-26 19:55:54 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-26 19:55:54 -0700 |
commit | 0e06f5c0deeef0332a5da2ecb8f1fcf3e024d958 (patch) | |
tree | e0f0af4aadf10c713c5cf1b65356844b3c9b3215 /drivers | |
parent | f7816ad0f878dacd5f0120476f9b836ccf8699ea (diff) | |
parent | 8f19b0c058d93a678a99dd6fec03af2e769943f2 (diff) | |
download | linux-0e06f5c0deeef0332a5da2ecb8f1fcf3e024d958.tar.bz2 |
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:
- a few misc bits
- ocfs2
- most(?) of MM
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (125 commits)
thp: fix comments of __pmd_trans_huge_lock()
cgroup: remove unnecessary 0 check from css_from_id()
cgroup: fix idr leak for the first cgroup root
mm: memcontrol: fix documentation for compound parameter
mm: memcontrol: remove BUG_ON in uncharge_list
mm: fix build warnings in <linux/compaction.h>
mm, thp: convert from optimistic swapin collapsing to conservative
mm, thp: fix comment inconsistency for swapin readahead functions
thp: update Documentation/{vm/transhuge,filesystems/proc}.txt
shmem: split huge pages beyond i_size under memory pressure
thp: introduce CONFIG_TRANSPARENT_HUGE_PAGECACHE
khugepaged: add support of collapse for tmpfs/shmem pages
shmem: make shmem_inode_info::lock irq-safe
khugepaged: move up_read(mmap_sem) out of khugepaged_alloc_page()
thp: extract khugepaged from mm/huge_memory.c
shmem, thp: respect MADV_{NO,}HUGEPAGE for file mappings
shmem: add huge pages support
shmem: get_unmapped_area align huge page
shmem: prepare huge= mount option and sysfs knob
mm, rmap: account shmem thp pages
...
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/base/memory.c | 28 | ||||
-rw-r--r-- | drivers/base/node.c | 13 | ||||
-rw-r--r-- | drivers/block/zram/Kconfig | 15 | ||||
-rw-r--r-- | drivers/block/zram/Makefile | 4 | ||||
-rw-r--r-- | drivers/block/zram/zcomp.c | 150 | ||||
-rw-r--r-- | drivers/block/zram/zcomp.h | 36 | ||||
-rw-r--r-- | drivers/block/zram/zcomp_lz4.c | 56 | ||||
-rw-r--r-- | drivers/block/zram/zcomp_lz4.h | 17 | ||||
-rw-r--r-- | drivers/block/zram/zcomp_lzo.c | 56 | ||||
-rw-r--r-- | drivers/block/zram/zcomp_lzo.h | 17 | ||||
-rw-r--r-- | drivers/block/zram/zram_drv.c | 48 | ||||
-rw-r--r-- | drivers/block/zram/zram_drv.h | 5 | ||||
-rw-r--r-- | drivers/char/mem.c | 24 | ||||
-rw-r--r-- | drivers/iommu/amd_iommu_v2.c | 3 | ||||
-rw-r--r-- | drivers/iommu/intel-svm.c | 2 | ||||
-rw-r--r-- | drivers/tty/sysrq.c | 1 | ||||
-rw-r--r-- | drivers/video/fbdev/core/fbmon.c | 1 | ||||
-rw-r--r-- | drivers/virtio/virtio_balloon.c | 52 | ||||
-rw-r--r-- | drivers/xen/xen-selfballoon.c | 4 |
19 files changed, 240 insertions, 292 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c index f46dba8b7092..dc75de9059cd 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -391,6 +391,7 @@ static ssize_t show_valid_zones(struct device *dev, unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block; struct page *first_page; struct zone *zone; + int zone_shift = 0; start_pfn = section_nr_to_pfn(mem->start_section_nr); end_pfn = start_pfn + nr_pages; @@ -402,21 +403,26 @@ static ssize_t show_valid_zones(struct device *dev, zone = page_zone(first_page); - if (zone_idx(zone) == ZONE_MOVABLE - 1) { - /*The mem block is the last memoryblock of this zone.*/ - if (end_pfn == zone_end_pfn(zone)) - return sprintf(buf, "%s %s\n", - zone->name, (zone + 1)->name); + /* MMOP_ONLINE_KEEP */ + sprintf(buf, "%s", zone->name); + + /* MMOP_ONLINE_KERNEL */ + zone_shift = zone_can_shift(start_pfn, nr_pages, ZONE_NORMAL); + if (zone_shift) { + strcat(buf, " "); + strcat(buf, (zone + zone_shift)->name); } - if (zone_idx(zone) == ZONE_MOVABLE) { - /*The mem block is the first memoryblock of ZONE_MOVABLE.*/ - if (start_pfn == zone->zone_start_pfn) - return sprintf(buf, "%s %s\n", - zone->name, (zone - 1)->name); + /* MMOP_ONLINE_MOVABLE */ + zone_shift = zone_can_shift(start_pfn, nr_pages, ZONE_MOVABLE); + if (zone_shift) { + strcat(buf, " "); + strcat(buf, (zone + zone_shift)->name); } - return sprintf(buf, "%s\n", zone->name); + strcat(buf, "\n"); + + return strlen(buf); } static DEVICE_ATTR(valid_zones, 0444, show_valid_zones, NULL); #endif diff --git a/drivers/base/node.c b/drivers/base/node.c index 560751bad294..51c7db2c4ee2 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -113,6 +113,8 @@ static ssize_t node_read_meminfo(struct device *dev, "Node %d SUnreclaim: %8lu kB\n" #ifdef CONFIG_TRANSPARENT_HUGEPAGE "Node %d AnonHugePages: %8lu kB\n" + "Node %d ShmemHugePages: %8lu kB\n" + "Node %d ShmemPmdMapped: %8lu kB\n" #endif , nid, K(node_page_state(nid, NR_FILE_DIRTY)), @@ -131,10 +133,13 @@ static ssize_t node_read_meminfo(struct device *dev, node_page_state(nid, NR_SLAB_UNRECLAIMABLE)), nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)), #ifdef CONFIG_TRANSPARENT_HUGEPAGE - nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)) - , nid, - K(node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) * - HPAGE_PMD_NR)); + nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)), + nid, K(node_page_state(nid, NR_ANON_THPS) * + HPAGE_PMD_NR), + nid, K(node_page_state(nid, NR_SHMEM_THPS) * + HPAGE_PMD_NR), + nid, K(node_page_state(nid, NR_SHMEM_PMDMAPPED) * + HPAGE_PMD_NR)); #else nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))); #endif diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index 386ba3d1a6ee..b8ecba6dcd3b 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -1,8 +1,7 @@ config ZRAM tristate "Compressed RAM block device support" - depends on BLOCK && SYSFS && ZSMALLOC - select LZO_COMPRESS - select LZO_DECOMPRESS + depends on BLOCK && SYSFS && ZSMALLOC && CRYPTO + select CRYPTO_LZO default n help Creates virtual block devices called /dev/zramX (X = 0, 1, ...). @@ -14,13 +13,3 @@ config ZRAM disks and maybe many more. See zram.txt for more information. - -config ZRAM_LZ4_COMPRESS - bool "Enable LZ4 algorithm support" - depends on ZRAM - select LZ4_COMPRESS - select LZ4_DECOMPRESS - default n - help - This option enables LZ4 compression algorithm support. Compression - algorithm can be changed using `comp_algorithm' device attribute.
\ No newline at end of file diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile index be0763ff57a2..9e2b79e9a990 100644 --- a/drivers/block/zram/Makefile +++ b/drivers/block/zram/Makefile @@ -1,5 +1,3 @@ -zram-y := zcomp_lzo.o zcomp.o zram_drv.o - -zram-$(CONFIG_ZRAM_LZ4_COMPRESS) += zcomp_lz4.o +zram-y := zcomp.o zram_drv.o obj-$(CONFIG_ZRAM) += zram.o diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index b51a816d766b..4b5cd3a7b2b6 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -14,108 +14,150 @@ #include <linux/wait.h> #include <linux/sched.h> #include <linux/cpu.h> +#include <linux/crypto.h> #include "zcomp.h" -#include "zcomp_lzo.h" -#ifdef CONFIG_ZRAM_LZ4_COMPRESS -#include "zcomp_lz4.h" -#endif -static struct zcomp_backend *backends[] = { - &zcomp_lzo, -#ifdef CONFIG_ZRAM_LZ4_COMPRESS - &zcomp_lz4, +static const char * const backends[] = { + "lzo", +#if IS_ENABLED(CONFIG_CRYPTO_LZ4) + "lz4", +#endif +#if IS_ENABLED(CONFIG_CRYPTO_DEFLATE) + "deflate", +#endif +#if IS_ENABLED(CONFIG_CRYPTO_LZ4HC) + "lz4hc", +#endif +#if IS_ENABLED(CONFIG_CRYPTO_842) + "842", #endif NULL }; -static struct zcomp_backend *find_backend(const char *compress) -{ - int i = 0; - while (backends[i]) { - if (sysfs_streq(compress, backends[i]->name)) - break; - i++; - } - return backends[i]; -} - -static void zcomp_strm_free(struct zcomp *comp, struct zcomp_strm *zstrm) +static void zcomp_strm_free(struct zcomp_strm *zstrm) { - if (zstrm->private) - comp->backend->destroy(zstrm->private); + if (!IS_ERR_OR_NULL(zstrm->tfm)) + crypto_free_comp(zstrm->tfm); free_pages((unsigned long)zstrm->buffer, 1); kfree(zstrm); } /* - * allocate new zcomp_strm structure with ->private initialized by + * allocate new zcomp_strm structure with ->tfm initialized by * backend, return NULL on error */ -static struct zcomp_strm *zcomp_strm_alloc(struct zcomp *comp, gfp_t flags) +static struct zcomp_strm *zcomp_strm_alloc(struct zcomp *comp) { - struct zcomp_strm *zstrm = kmalloc(sizeof(*zstrm), flags); + struct zcomp_strm *zstrm = kmalloc(sizeof(*zstrm), GFP_KERNEL); if (!zstrm) return NULL; - zstrm->private = comp->backend->create(flags); + zstrm->tfm = crypto_alloc_comp(comp->name, 0, 0); /* * allocate 2 pages. 1 for compressed data, plus 1 extra for the * case when compressed size is larger than the original one */ - zstrm->buffer = (void *)__get_free_pages(flags | __GFP_ZERO, 1); - if (!zstrm->private || !zstrm->buffer) { - zcomp_strm_free(comp, zstrm); + zstrm->buffer = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1); + if (IS_ERR_OR_NULL(zstrm->tfm) || !zstrm->buffer) { + zcomp_strm_free(zstrm); zstrm = NULL; } return zstrm; } +bool zcomp_available_algorithm(const char *comp) +{ + int i = 0; + + while (backends[i]) { + if (sysfs_streq(comp, backends[i])) + return true; + i++; + } + + /* + * Crypto does not ignore a trailing new line symbol, + * so make sure you don't supply a string containing + * one. + * This also means that we permit zcomp initialisation + * with any compressing algorithm known to crypto api. + */ + return crypto_has_comp(comp, 0, 0) == 1; +} + /* show available compressors */ ssize_t zcomp_available_show(const char *comp, char *buf) { + bool known_algorithm = false; ssize_t sz = 0; int i = 0; - while (backends[i]) { - if (!strcmp(comp, backends[i]->name)) + for (; backends[i]; i++) { + if (!strcmp(comp, backends[i])) { + known_algorithm = true; sz += scnprintf(buf + sz, PAGE_SIZE - sz - 2, - "[%s] ", backends[i]->name); - else + "[%s] ", backends[i]); + } else { sz += scnprintf(buf + sz, PAGE_SIZE - sz - 2, - "%s ", backends[i]->name); - i++; + "%s ", backends[i]); + } } + + /* + * Out-of-tree module known to crypto api or a missing + * entry in `backends'. + */ + if (!known_algorithm && crypto_has_comp(comp, 0, 0) == 1) + sz += scnprintf(buf + sz, PAGE_SIZE - sz - 2, + "[%s] ", comp); + sz += scnprintf(buf + sz, PAGE_SIZE - sz, "\n"); return sz; } -bool zcomp_available_algorithm(const char *comp) -{ - return find_backend(comp) != NULL; -} - -struct zcomp_strm *zcomp_strm_find(struct zcomp *comp) +struct zcomp_strm *zcomp_stream_get(struct zcomp *comp) { return *get_cpu_ptr(comp->stream); } -void zcomp_strm_release(struct zcomp *comp, struct zcomp_strm *zstrm) +void zcomp_stream_put(struct zcomp *comp) { put_cpu_ptr(comp->stream); } -int zcomp_compress(struct zcomp *comp, struct zcomp_strm *zstrm, - const unsigned char *src, size_t *dst_len) +int zcomp_compress(struct zcomp_strm *zstrm, + const void *src, unsigned int *dst_len) { - return comp->backend->compress(src, zstrm->buffer, dst_len, - zstrm->private); + /* + * Our dst memory (zstrm->buffer) is always `2 * PAGE_SIZE' sized + * because sometimes we can endup having a bigger compressed data + * due to various reasons: for example compression algorithms tend + * to add some padding to the compressed buffer. Speaking of padding, + * comp algorithm `842' pads the compressed length to multiple of 8 + * and returns -ENOSP when the dst memory is not big enough, which + * is not something that ZRAM wants to see. We can handle the + * `compressed_size > PAGE_SIZE' case easily in ZRAM, but when we + * receive -ERRNO from the compressing backend we can't help it + * anymore. To make `842' happy we need to tell the exact size of + * the dst buffer, zram_drv will take care of the fact that + * compressed buffer is too big. + */ + *dst_len = PAGE_SIZE * 2; + + return crypto_comp_compress(zstrm->tfm, + src, PAGE_SIZE, + zstrm->buffer, dst_len); } -int zcomp_decompress(struct zcomp *comp, const unsigned char *src, - size_t src_len, unsigned char *dst) +int zcomp_decompress(struct zcomp_strm *zstrm, + const void *src, unsigned int src_len, void *dst) { - return comp->backend->decompress(src, src_len, dst); + unsigned int dst_len = PAGE_SIZE; + + return crypto_comp_decompress(zstrm->tfm, + src, src_len, + dst, &dst_len); } static int __zcomp_cpu_notifier(struct zcomp *comp, @@ -127,7 +169,7 @@ static int __zcomp_cpu_notifier(struct zcomp *comp, case CPU_UP_PREPARE: if (WARN_ON(*per_cpu_ptr(comp->stream, cpu))) break; - zstrm = zcomp_strm_alloc(comp, GFP_KERNEL); + zstrm = zcomp_strm_alloc(comp); if (IS_ERR_OR_NULL(zstrm)) { pr_err("Can't allocate a compression stream\n"); return NOTIFY_BAD; @@ -138,7 +180,7 @@ static int __zcomp_cpu_notifier(struct zcomp *comp, case CPU_UP_CANCELED: zstrm = *per_cpu_ptr(comp->stream, cpu); if (!IS_ERR_OR_NULL(zstrm)) - zcomp_strm_free(comp, zstrm); + zcomp_strm_free(zstrm); *per_cpu_ptr(comp->stream, cpu) = NULL; break; default: @@ -209,18 +251,16 @@ void zcomp_destroy(struct zcomp *comp) struct zcomp *zcomp_create(const char *compress) { struct zcomp *comp; - struct zcomp_backend *backend; int error; - backend = find_backend(compress); - if (!backend) + if (!zcomp_available_algorithm(compress)) return ERR_PTR(-EINVAL); comp = kzalloc(sizeof(struct zcomp), GFP_KERNEL); if (!comp) return ERR_PTR(-ENOMEM); - comp->backend = backend; + comp->name = compress; error = zcomp_init(comp); if (error) { kfree(comp); diff --git a/drivers/block/zram/zcomp.h b/drivers/block/zram/zcomp.h index ffd88cb747fe..478cac2ed465 100644 --- a/drivers/block/zram/zcomp.h +++ b/drivers/block/zram/zcomp.h @@ -13,33 +13,15 @@ struct zcomp_strm { /* compression/decompression buffer */ void *buffer; - /* - * The private data of the compression stream, only compression - * stream backend can touch this (e.g. compression algorithm - * working memory) - */ - void *private; -}; - -/* static compression backend */ -struct zcomp_backend { - int (*compress)(const unsigned char *src, unsigned char *dst, - size_t *dst_len, void *private); - - int (*decompress)(const unsigned char *src, size_t src_len, - unsigned char *dst); - - void *(*create)(gfp_t flags); - void (*destroy)(void *private); - - const char *name; + struct crypto_comp *tfm; }; /* dynamic per-device compression frontend */ struct zcomp { struct zcomp_strm * __percpu *stream; - struct zcomp_backend *backend; struct notifier_block notifier; + + const char *name; }; ssize_t zcomp_available_show(const char *comp, char *buf); @@ -48,14 +30,14 @@ bool zcomp_available_algorithm(const char *comp); struct zcomp *zcomp_create(const char *comp); void zcomp_destroy(struct zcomp *comp); -struct zcomp_strm *zcomp_strm_find(struct zcomp *comp); -void zcomp_strm_release(struct zcomp *comp, struct zcomp_strm *zstrm); +struct zcomp_strm *zcomp_stream_get(struct zcomp *comp); +void zcomp_stream_put(struct zcomp *comp); -int zcomp_compress(struct zcomp *comp, struct zcomp_strm *zstrm, - const unsigned char *src, size_t *dst_len); +int zcomp_compress(struct zcomp_strm *zstrm, + const void *src, unsigned int *dst_len); -int zcomp_decompress(struct zcomp *comp, const unsigned char *src, - size_t src_len, unsigned char *dst); +int zcomp_decompress(struct zcomp_strm *zstrm, + const void *src, unsigned int src_len, void *dst); bool zcomp_set_max_streams(struct zcomp *comp, int num_strm); #endif /* _ZCOMP_H_ */ diff --git a/drivers/block/zram/zcomp_lz4.c b/drivers/block/zram/zcomp_lz4.c deleted file mode 100644 index 0110086accba..000000000000 --- a/drivers/block/zram/zcomp_lz4.c +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Copyright (C) 2014 Sergey Senozhatsky. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/lz4.h> -#include <linux/vmalloc.h> -#include <linux/mm.h> - -#include "zcomp_lz4.h" - -static void *zcomp_lz4_create(gfp_t flags) -{ - void *ret; - - ret = kmalloc(LZ4_MEM_COMPRESS, flags); - if (!ret) - ret = __vmalloc(LZ4_MEM_COMPRESS, - flags | __GFP_HIGHMEM, - PAGE_KERNEL); - return ret; -} - -static void zcomp_lz4_destroy(void *private) -{ - kvfree(private); -} - -static int zcomp_lz4_compress(const unsigned char *src, unsigned char *dst, - size_t *dst_len, void *private) -{ - /* return : Success if return 0 */ - return lz4_compress(src, PAGE_SIZE, dst, dst_len, private); -} - -static int zcomp_lz4_decompress(const unsigned char *src, size_t src_len, - unsigned char *dst) -{ - size_t dst_len = PAGE_SIZE; - /* return : Success if return 0 */ - return lz4_decompress_unknownoutputsize(src, src_len, dst, &dst_len); -} - -struct zcomp_backend zcomp_lz4 = { - .compress = zcomp_lz4_compress, - .decompress = zcomp_lz4_decompress, - .create = zcomp_lz4_create, - .destroy = zcomp_lz4_destroy, - .name = "lz4", -}; diff --git a/drivers/block/zram/zcomp_lz4.h b/drivers/block/zram/zcomp_lz4.h deleted file mode 100644 index 60613fb29dd8..000000000000 --- a/drivers/block/zram/zcomp_lz4.h +++ /dev/null @@ -1,17 +0,0 @@ -/* - * Copyright (C) 2014 Sergey Senozhatsky. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#ifndef _ZCOMP_LZ4_H_ -#define _ZCOMP_LZ4_H_ - -#include "zcomp.h" - -extern struct zcomp_backend zcomp_lz4; - -#endif /* _ZCOMP_LZ4_H_ */ diff --git a/drivers/block/zram/zcomp_lzo.c b/drivers/block/zram/zcomp_lzo.c deleted file mode 100644 index ed7a1f0549ec..000000000000 --- a/drivers/block/zram/zcomp_lzo.c +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Copyright (C) 2014 Sergey Senozhatsky. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/lzo.h> -#include <linux/vmalloc.h> -#include <linux/mm.h> - -#include "zcomp_lzo.h" - -static void *lzo_create(gfp_t flags) -{ - void *ret; - - ret = kmalloc(LZO1X_MEM_COMPRESS, flags); - if (!ret) - ret = __vmalloc(LZO1X_MEM_COMPRESS, - flags | __GFP_HIGHMEM, - PAGE_KERNEL); - return ret; -} - -static void lzo_destroy(void *private) -{ - kvfree(private); -} - -static int lzo_compress(const unsigned char *src, unsigned char *dst, - size_t *dst_len, void *private) -{ - int ret = lzo1x_1_compress(src, PAGE_SIZE, dst, dst_len, private); - return ret == LZO_E_OK ? 0 : ret; -} - -static int lzo_decompress(const unsigned char *src, size_t src_len, - unsigned char *dst) -{ - size_t dst_len = PAGE_SIZE; - int ret = lzo1x_decompress_safe(src, src_len, dst, &dst_len); - return ret == LZO_E_OK ? 0 : ret; -} - -struct zcomp_backend zcomp_lzo = { - .compress = lzo_compress, - .decompress = lzo_decompress, - .create = lzo_create, - .destroy = lzo_destroy, - .name = "lzo", -}; diff --git a/drivers/block/zram/zcomp_lzo.h b/drivers/block/zram/zcomp_lzo.h deleted file mode 100644 index 128c5807fa14..000000000000 --- a/drivers/block/zram/zcomp_lzo.h +++ /dev/null @@ -1,17 +0,0 @@ -/* - * Copyright (C) 2014 Sergey Senozhatsky. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#ifndef _ZCOMP_LZO_H_ -#define _ZCOMP_LZO_H_ - -#include "zcomp.h" - -extern struct zcomp_backend zcomp_lzo; - -#endif /* _ZCOMP_LZO_H_ */ diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index e5e5d19f2172..7454cf188c8e 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -342,9 +342,16 @@ static ssize_t comp_algorithm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct zram *zram = dev_to_zram(dev); + char compressor[CRYPTO_MAX_ALG_NAME]; size_t sz; - if (!zcomp_available_algorithm(buf)) + strlcpy(compressor, buf, sizeof(compressor)); + /* ignore trailing newline */ + sz = strlen(compressor); + if (sz > 0 && compressor[sz - 1] == '\n') + compressor[sz - 1] = 0x00; + + if (!zcomp_available_algorithm(compressor)) return -EINVAL; down_write(&zram->init_lock); @@ -353,13 +360,8 @@ static ssize_t comp_algorithm_store(struct device *dev, pr_info("Can't change algorithm for initialized device\n"); return -EBUSY; } - strlcpy(zram->compressor, buf, sizeof(zram->compressor)); - - /* ignore trailing newline */ - sz = strlen(zram->compressor); - if (sz > 0 && zram->compressor[sz - 1] == '\n') - zram->compressor[sz - 1] = 0x00; + strlcpy(zram->compressor, compressor, sizeof(compressor)); up_write(&zram->init_lock); return len; } @@ -563,7 +565,7 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index) unsigned char *cmem; struct zram_meta *meta = zram->meta; unsigned long handle; - size_t size; + unsigned int size; bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); handle = meta->table[index].handle; @@ -576,10 +578,14 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index) } cmem = zs_map_object(meta->mem_pool, handle, ZS_MM_RO); - if (size == PAGE_SIZE) + if (size == PAGE_SIZE) { copy_page(mem, cmem); - else - ret = zcomp_decompress(zram->comp, cmem, size, mem); + } else { + struct zcomp_strm *zstrm = zcomp_stream_get(zram->comp); + + ret = zcomp_decompress(zstrm, cmem, size, mem); + zcomp_stream_put(zram->comp); + } zs_unmap_object(meta->mem_pool, handle); bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); @@ -646,7 +652,7 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, int offset) { int ret = 0; - size_t clen; + unsigned int clen; unsigned long handle = 0; struct page *page; unsigned char *user_mem, *cmem, *src, *uncmem = NULL; @@ -695,8 +701,8 @@ compress_again: goto out; } - zstrm = zcomp_strm_find(zram->comp); - ret = zcomp_compress(zram->comp, zstrm, uncmem, &clen); + zstrm = zcomp_stream_get(zram->comp); + ret = zcomp_compress(zstrm, uncmem, &clen); if (!is_partial_io(bvec)) { kunmap_atomic(user_mem); user_mem = NULL; @@ -732,19 +738,21 @@ compress_again: handle = zs_malloc(meta->mem_pool, clen, __GFP_KSWAPD_RECLAIM | __GFP_NOWARN | - __GFP_HIGHMEM); + __GFP_HIGHMEM | + __GFP_MOVABLE); if (!handle) { - zcomp_strm_release(zram->comp, zstrm); + zcomp_stream_put(zram->comp); zstrm = NULL; atomic64_inc(&zram->stats.writestall); handle = zs_malloc(meta->mem_pool, clen, - GFP_NOIO | __GFP_HIGHMEM); + GFP_NOIO | __GFP_HIGHMEM | + __GFP_MOVABLE); if (handle) goto compress_again; - pr_err("Error allocating memory for compressed page: %u, size=%zu\n", + pr_err("Error allocating memory for compressed page: %u, size=%u\n", index, clen); ret = -ENOMEM; goto out; @@ -769,7 +777,7 @@ compress_again: memcpy(cmem, src, clen); } - zcomp_strm_release(zram->comp, zstrm); + zcomp_stream_put(zram->comp); zstrm = NULL; zs_unmap_object(meta->mem_pool, handle); @@ -789,7 +797,7 @@ compress_again: atomic64_inc(&zram->stats.pages_stored); out: if (zstrm) - zcomp_strm_release(zram->comp, zstrm); + zcomp_stream_put(zram->comp); if (is_partial_io(bvec)) kfree(uncmem); return ret; diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h index 3f5bf66a27e4..74fcf10da374 100644 --- a/drivers/block/zram/zram_drv.h +++ b/drivers/block/zram/zram_drv.h @@ -15,8 +15,9 @@ #ifndef _ZRAM_DRV_H_ #define _ZRAM_DRV_H_ -#include <linux/spinlock.h> +#include <linux/rwsem.h> #include <linux/zsmalloc.h> +#include <linux/crypto.h> #include "zcomp.h" @@ -113,7 +114,7 @@ struct zram { * we can store in a disk. */ u64 disksize; /* bytes */ - char compressor[10]; + char compressor[CRYPTO_MAX_ALG_NAME]; /* * zram is claimed so open request will be failed */ diff --git a/drivers/char/mem.c b/drivers/char/mem.c index d633974e7f8b..a33163dbb913 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -22,6 +22,7 @@ #include <linux/device.h> #include <linux/highmem.h> #include <linux/backing-dev.h> +#include <linux/shmem_fs.h> #include <linux/splice.h> #include <linux/pfn.h> #include <linux/export.h> @@ -657,6 +658,28 @@ static int mmap_zero(struct file *file, struct vm_area_struct *vma) return 0; } +static unsigned long get_unmapped_area_zero(struct file *file, + unsigned long addr, unsigned long len, + unsigned long pgoff, unsigned long flags) +{ +#ifdef CONFIG_MMU + if (flags & MAP_SHARED) { + /* + * mmap_zero() will call shmem_zero_setup() to create a file, + * so use shmem's get_unmapped_area in case it can be huge; + * and pass NULL for file as in mmap.c's get_unmapped_area(), + * so as not to confuse shmem with our handle on "/dev/zero". + */ + return shmem_get_unmapped_area(NULL, addr, len, pgoff, flags); + } + + /* Otherwise flags & MAP_PRIVATE: with no shmem object beneath it */ + return current->mm->get_unmapped_area(file, addr, len, pgoff, flags); +#else + return -ENOSYS; +#endif +} + static ssize_t write_full(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { @@ -764,6 +787,7 @@ static const struct file_operations zero_fops = { .read_iter = read_iter_zero, .write_iter = write_iter_zero, .mmap = mmap_zero, + .get_unmapped_area = get_unmapped_area_zero, #ifndef CONFIG_MMU .mmap_capabilities = zero_mmap_capabilities, #endif diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index 56999d2fac07..fbdaf81ae925 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -538,8 +538,7 @@ static void do_fault(struct work_struct *work) if (access_error(vma, fault)) goto out; - ret = handle_mm_fault(mm, vma, address, flags); - + ret = handle_mm_fault(vma, address, flags); out: up_read(&mm->mmap_sem); diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index d9939fa9b588..8ebb3530afa7 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -583,7 +583,7 @@ static irqreturn_t prq_event_thread(int irq, void *d) if (access_error(vma, req)) goto invalid; - ret = handle_mm_fault(svm->mm, vma, address, + ret = handle_mm_fault(vma, address, req->wr_req ? FAULT_FLAG_WRITE : 0); if (ret & VM_FAULT_ERROR) goto invalid; diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c index e5139402e7f8..52bbd27e93ae 100644 --- a/drivers/tty/sysrq.c +++ b/drivers/tty/sysrq.c @@ -363,6 +363,7 @@ static void moom_callback(struct work_struct *ignored) struct oom_control oc = { .zonelist = node_zonelist(first_memory_node, gfp_mask), .nodemask = NULL, + .memcg = NULL, .gfp_mask = gfp_mask, .order = -1, }; diff --git a/drivers/video/fbdev/core/fbmon.c b/drivers/video/fbdev/core/fbmon.c index 47c3191ec313..62c0cf79674f 100644 --- a/drivers/video/fbdev/core/fbmon.c +++ b/drivers/video/fbdev/core/fbmon.c @@ -1496,7 +1496,6 @@ int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var) } void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs) { - specs = NULL; } void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs) { diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 476c0e3a7150..888d5f8322ce 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -30,6 +30,7 @@ #include <linux/oom.h> #include <linux/wait.h> #include <linux/mm.h> +#include <linux/mount.h> /* * Balloon device works in 4K page units. So each page is pointed to by @@ -45,6 +46,10 @@ static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; module_param(oom_pages, int, S_IRUSR | S_IWUSR); MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); +#ifdef CONFIG_BALLOON_COMPACTION +static struct vfsmount *balloon_mnt; +#endif + struct virtio_balloon { struct virtio_device *vdev; struct virtqueue *inflate_vq, *deflate_vq, *stats_vq; @@ -490,6 +495,24 @@ static int virtballoon_migratepage(struct balloon_dev_info *vb_dev_info, return MIGRATEPAGE_SUCCESS; } + +static struct dentry *balloon_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + static const struct dentry_operations ops = { + .d_dname = simple_dname, + }; + + return mount_pseudo(fs_type, "balloon-kvm:", NULL, &ops, + BALLOON_KVM_MAGIC); +} + +static struct file_system_type balloon_fs = { + .name = "balloon-kvm", + .mount = balloon_mount, + .kill_sb = kill_anon_super, +}; + #endif /* CONFIG_BALLOON_COMPACTION */ static int virtballoon_probe(struct virtio_device *vdev) @@ -519,9 +542,6 @@ static int virtballoon_probe(struct virtio_device *vdev) vb->vdev = vdev; balloon_devinfo_init(&vb->vb_dev_info); -#ifdef CONFIG_BALLOON_COMPACTION - vb->vb_dev_info.migratepage = virtballoon_migratepage; -#endif err = init_vqs(vb); if (err) @@ -531,13 +551,33 @@ static int virtballoon_probe(struct virtio_device *vdev) vb->nb.priority = VIRTBALLOON_OOM_NOTIFY_PRIORITY; err = register_oom_notifier(&vb->nb); if (err < 0) - goto out_oom_notify; + goto out_del_vqs; + +#ifdef CONFIG_BALLOON_COMPACTION + balloon_mnt = kern_mount(&balloon_fs); + if (IS_ERR(balloon_mnt)) { + err = PTR_ERR(balloon_mnt); + unregister_oom_notifier(&vb->nb); + goto out_del_vqs; + } + + vb->vb_dev_info.migratepage = virtballoon_migratepage; + vb->vb_dev_info.inode = alloc_anon_inode(balloon_mnt->mnt_sb); + if (IS_ERR(vb->vb_dev_info.inode)) { + err = PTR_ERR(vb->vb_dev_info.inode); + kern_unmount(balloon_mnt); + unregister_oom_notifier(&vb->nb); + vb->vb_dev_info.inode = NULL; + goto out_del_vqs; + } + vb->vb_dev_info.inode->i_mapping->a_ops = &balloon_aops; +#endif virtio_device_ready(vdev); return 0; -out_oom_notify: +out_del_vqs: vdev->config->del_vqs(vdev); out_free_vb: kfree(vb); @@ -571,6 +611,8 @@ static void virtballoon_remove(struct virtio_device *vdev) cancel_work_sync(&vb->update_balloon_stats_work); remove_common(vb); + if (vb->vb_dev_info.inode) + iput(vb->vb_dev_info.inode); kfree(vb); } diff --git a/drivers/xen/xen-selfballoon.c b/drivers/xen/xen-selfballoon.c index 53a085fca00c..66620713242a 100644 --- a/drivers/xen/xen-selfballoon.c +++ b/drivers/xen/xen-selfballoon.c @@ -195,7 +195,7 @@ static void selfballoon_process(struct work_struct *work) MB2PAGES(selfballoon_reserved_mb); #ifdef CONFIG_FRONTSWAP /* allow space for frontswap pages to be repatriated */ - if (frontswap_selfshrinking && frontswap_enabled) + if (frontswap_selfshrinking) goal_pages += frontswap_curr_pages(); #endif if (cur_pages > goal_pages) @@ -230,7 +230,7 @@ static void selfballoon_process(struct work_struct *work) reset_timer = true; } #ifdef CONFIG_FRONTSWAP - if (frontswap_selfshrinking && frontswap_enabled) { + if (frontswap_selfshrinking) { frontswap_selfshrink(); reset_timer = true; } |