diff options
author | Jeff Layton <jlayton@redhat.com> | 2012-09-19 06:22:42 -0700 |
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committer | Steve French <smfrench@gmail.com> | 2012-09-24 21:46:32 -0500 |
commit | 71953fc6e4ce5ac05b594d8e5866accf531aa969 (patch) | |
tree | 3c26e6418eeac94c542ea1d29153f8dc6db3a006 /fs | |
parent | 5819575ec6b82345e1a21a960d381c699a91c700 (diff) | |
download | linux-71953fc6e4ce5ac05b594d8e5866accf531aa969.tar.bz2 |
cifs: remove kmap lock and rsize limit
Now that we aren't abusing the kmap address space, there's no need for
this lock or to impose a limit on the rsize.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/cifs/cifsfs.c | 4 | ||||
-rw-r--r-- | fs/cifs/cifsglob.h | 39 | ||||
-rw-r--r-- | fs/cifs/smb1ops.c | 3 | ||||
-rw-r--r-- | fs/cifs/smb2ops.c | 3 |
4 files changed, 0 insertions, 49 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 4dda4890d776..3a3e2fee0b3e 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -88,10 +88,6 @@ extern mempool_t *cifs_mid_poolp; struct workqueue_struct *cifsiod_wq; -#ifdef CONFIG_HIGHMEM -DEFINE_MUTEX(cifs_kmap_mutex); -#endif - static int cifs_read_super(struct super_block *sb) { diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 79e8b6f06021..b2bb941d8ddd 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -638,45 +638,6 @@ get_next_mid(struct TCP_Server_Info *server) #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) /* - * On hosts with high memory, we can't currently support wsize/rsize that are - * larger than we can kmap at once. Cap the rsize/wsize at - * LAST_PKMAP * PAGE_SIZE. We'll never be able to fill a read or write request - * larger than that anyway. - */ -#ifdef CONFIG_HIGHMEM -#define CIFS_KMAP_SIZE_LIMIT (LAST_PKMAP * PAGE_CACHE_SIZE) -#else /* CONFIG_HIGHMEM */ -#define CIFS_KMAP_SIZE_LIMIT (1<<24) -#endif /* CONFIG_HIGHMEM */ - -#ifdef CONFIG_HIGHMEM -/* - * On arches that have high memory, kmap address space is limited. By - * serializing the kmap operations on those arches, we ensure that we don't - * end up with a bunch of threads in writeback with partially mapped page - * arrays, stuck waiting for kmap to come back. That situation prevents - * progress and can deadlock. - */ - -extern struct mutex cifs_kmap_mutex; - -static inline void -cifs_kmap_lock(void) -{ - mutex_lock(&cifs_kmap_mutex); -} - -static inline void -cifs_kmap_unlock(void) -{ - mutex_unlock(&cifs_kmap_mutex); -} -#else /* !CONFIG_HIGHMEM */ -#define cifs_kmap_lock() do { ; } while (0) -#define cifs_kmap_unlock() do { ; } while (0) -#endif /* CONFIG_HIGHMEM */ - -/* * Macros to allow the TCP_Server_Info->net field and related code to drop out * when CONFIG_NET_NS isn't set. */ diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index 8727ef712a3c..ed7f95532383 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -483,9 +483,6 @@ cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) if (!(server->capabilities & CAP_LARGE_READ_X)) rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); - /* limit to the amount that we can kmap at once */ - rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT); - /* hard limit of CIFS_MAX_RSIZE */ rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index a621d6125367..b1dedf8cb372 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -205,9 +205,6 @@ smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) */ rsize = min_t(unsigned int, rsize, 2 << 15); - /* limit to the amount that we can kmap at once */ - rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT); - return rsize; } |