diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/direct-io.c | 85 | ||||
| -rw-r--r-- | fs/ext4/ext4.h | 11 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 28 | ||||
| -rw-r--r-- | fs/ext4/page-io.c | 30 | ||||
| -rw-r--r-- | fs/ext4/super.c | 16 | ||||
| -rw-r--r-- | fs/ocfs2/aops.c | 8 | ||||
| -rw-r--r-- | fs/super.c | 18 | ||||
| -rw-r--r-- | fs/xfs/xfs_aops.c | 28 | ||||
| -rw-r--r-- | fs/xfs/xfs_aops.h | 3 |
9 files changed, 98 insertions, 129 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c index 7ab90f5081ee..8b31b9f449f4 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -127,6 +127,7 @@ struct dio { spinlock_t bio_lock; /* protects BIO fields below */ int page_errors; /* errno from get_user_pages() */ int is_async; /* is IO async ? */ + bool defer_completion; /* defer AIO completion to workqueue? */ int io_error; /* IO error in completion path */ unsigned long refcount; /* direct_io_worker() and bios */ struct bio *bio_list; /* singly linked via bi_private */ @@ -141,7 +142,10 @@ struct dio { * allocation time. Don't add new fields after pages[] unless you * wish that they not be zeroed. */ - struct page *pages[DIO_PAGES]; /* page buffer */ + union { + struct page *pages[DIO_PAGES]; /* page buffer */ + struct work_struct complete_work;/* deferred AIO completion */ + }; } ____cacheline_aligned_in_smp; static struct kmem_cache *dio_cache __read_mostly; @@ -221,16 +225,16 @@ static inline struct page *dio_get_page(struct dio *dio, * dio_complete() - called when all DIO BIO I/O has been completed * @offset: the byte offset in the file of the completed operation * - * This releases locks as dictated by the locking type, lets interested parties - * know that a DIO operation has completed, and calculates the resulting return - * code for the operation. + * This drops i_dio_count, lets interested parties know that a DIO operation + * has completed, and calculates the resulting return code for the operation. * * It lets the filesystem know if it registered an interest earlier via * get_block. Pass the private field of the map buffer_head so that * filesystems can use it to hold additional state between get_block calls and * dio_complete. */ -static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is_async) +static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, + bool is_async) { ssize_t transferred = 0; @@ -258,19 +262,26 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is if (ret == 0) ret = transferred; - if (dio->end_io && dio->result) { - dio->end_io(dio->iocb, offset, transferred, - dio->private, ret, is_async); - } else { - inode_dio_done(dio->inode); - if (is_async) - aio_complete(dio->iocb, ret, 0); - } + if (dio->end_io && dio->result) + dio->end_io(dio->iocb, offset, transferred, dio->private); + + inode_dio_done(dio->inode); + if (is_async) + aio_complete(dio->iocb, ret, 0); + kmem_cache_free(dio_cache, dio); return ret; } +static void dio_aio_complete_work(struct work_struct *work) +{ + struct dio *dio = container_of(work, struct dio, complete_work); + + dio_complete(dio, dio->iocb->ki_pos, 0, true); +} + static int dio_bio_complete(struct dio *dio, struct bio *bio); + /* * Asynchronous IO callback. */ @@ -290,8 +301,13 @@ static void dio_bio_end_aio(struct bio *bio, int error) spin_unlock_irqrestore(&dio->bio_lock, flags); if (remaining == 0) { - dio_complete(dio, dio->iocb->ki_pos, 0, true); - kmem_cache_free(dio_cache, dio); + if (dio->result && dio->defer_completion) { + INIT_WORK(&dio->complete_work, dio_aio_complete_work); + queue_work(dio->inode->i_sb->s_dio_done_wq, + &dio->complete_work); + } else { + dio_complete(dio, dio->iocb->ki_pos, 0, true); + } } } @@ -511,6 +527,41 @@ static inline int dio_bio_reap(struct dio *dio, struct dio_submit *sdio) } /* + * Create workqueue for deferred direct IO completions. We allocate the + * workqueue when it's first needed. This avoids creating workqueue for + * filesystems that don't need it and also allows us to create the workqueue + * late enough so the we can include s_id in the name of the workqueue. + */ +static int sb_init_dio_done_wq(struct super_block *sb) +{ + struct workqueue_struct *wq = alloc_workqueue("dio/%s", + WQ_MEM_RECLAIM, 0, + sb->s_id); + if (!wq) + return -ENOMEM; + /* + * This has to be atomic as more DIOs can race to create the workqueue + */ + cmpxchg(&sb->s_dio_done_wq, NULL, wq); + /* Someone created workqueue before us? Free ours... */ + if (wq != sb->s_dio_done_wq) + destroy_workqueue(wq); + return 0; +} + +static int dio_set_defer_completion(struct dio *dio) +{ + struct super_block *sb = dio->inode->i_sb; + + if (dio->defer_completion) + return 0; + dio->defer_completion = true; + if (!sb->s_dio_done_wq) + return sb_init_dio_done_wq(sb); + return 0; +} + +/* * Call into the fs to map some more disk blocks. We record the current number * of available blocks at sdio->blocks_available. These are in units of the * fs blocksize, (1 << inode->i_blkbits). @@ -581,6 +632,9 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio, /* Store for completion */ dio->private = map_bh->b_private; + + if (ret == 0 && buffer_defer_completion(map_bh)) + ret = dio_set_defer_completion(dio); } return ret; } @@ -1269,7 +1323,6 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, if (drop_refcount(dio) == 0) { retval = dio_complete(dio, offset, retval, false); - kmem_cache_free(dio_cache, dio); } else BUG_ON(retval != -EIOCBQUEUED); diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 0ab26fbf3380..b247fbbed99c 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -180,7 +180,6 @@ struct ext4_map_blocks { * Flags for ext4_io_end->flags */ #define EXT4_IO_END_UNWRITTEN 0x0001 -#define EXT4_IO_END_DIRECT 0x0002 /* * For converting uninitialized extents on a work queue. 'handle' is used for @@ -196,8 +195,6 @@ typedef struct ext4_io_end { unsigned int flag; /* unwritten or not */ loff_t offset; /* offset in the file */ ssize_t size; /* size of the extent */ - struct kiocb *iocb; /* iocb struct for AIO */ - int result; /* error value for AIO */ atomic_t count; /* reference counter */ } ext4_io_end_t; @@ -900,11 +897,9 @@ struct ext4_inode_info { * Completed IOs that need unwritten extents handling and don't have * transaction reserved */ - struct list_head i_unrsv_conversion_list; atomic_t i_ioend_count; /* Number of outstanding io_end structs */ atomic_t i_unwritten; /* Nr. of inflight conversions pending */ struct work_struct i_rsv_conversion_work; - struct work_struct i_unrsv_conversion_work; spinlock_t i_block_reservation_lock; @@ -1276,8 +1271,6 @@ struct ext4_sb_info { struct flex_groups *s_flex_groups; ext4_group_t s_flex_groups_allocated; - /* workqueue for unreserved extent convertions (dio) */ - struct workqueue_struct *unrsv_conversion_wq; /* workqueue for reserved extent conversions (buffered io) */ struct workqueue_struct *rsv_conversion_wq; @@ -1340,9 +1333,6 @@ static inline void ext4_set_io_unwritten_flag(struct inode *inode, struct ext4_io_end *io_end) { if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { - /* Writeback has to have coversion transaction reserved */ - WARN_ON(EXT4_SB(inode->i_sb)->s_journal && !io_end->handle && - !(io_end->flag & EXT4_IO_END_DIRECT)); io_end->flag |= EXT4_IO_END_UNWRITTEN; atomic_inc(&EXT4_I(inode)->i_unwritten); } @@ -2716,7 +2706,6 @@ extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); extern void ext4_io_submit_init(struct ext4_io_submit *io, struct writeback_control *wbc); extern void ext4_end_io_rsv_work(struct work_struct *work); -extern void ext4_end_io_unrsv_work(struct work_struct *work); extern void ext4_io_submit(struct ext4_io_submit *io); extern int ext4_bio_write_page(struct ext4_io_submit *io, struct page *page, diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c2ca04e67a4f..123bd81692d1 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -727,8 +727,12 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock, ret = ext4_map_blocks(handle, inode, &map, flags); if (ret > 0) { + ext4_io_end_t *io_end = ext4_inode_aio(inode); + map_bh(bh, inode->i_sb, map.m_pblk); bh->b_state = (bh->b_state & ~EXT4_MAP_FLAGS) | map.m_flags; + if (io_end && io_end->flag & EXT4_IO_END_UNWRITTEN) + set_buffer_defer_completion(bh); bh->b_size = inode->i_sb->s_blocksize * map.m_len; ret = 0; } @@ -2991,19 +2995,13 @@ static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock, } static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, - ssize_t size, void *private, int ret, - bool is_async) + ssize_t size, void *private) { - struct inode *inode = file_inode(iocb->ki_filp); ext4_io_end_t *io_end = iocb->private; /* if not async direct IO just return */ - if (!io_end) { - inode_dio_done(inode); - if (is_async) - aio_complete(iocb, ret, 0); + if (!io_end) return; - } ext_debug("ext4_end_io_dio(): io_end 0x%p " "for inode %lu, iocb 0x%p, offset %llu, size %zd\n", @@ -3013,11 +3011,7 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, iocb->private = NULL; io_end->offset = offset; io_end->size = size; - if (is_async) { - io_end->iocb = iocb; - io_end->result = ret; - } - ext4_put_io_end_defer(io_end); + ext4_put_io_end(io_end); } /* @@ -3102,7 +3096,6 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, ret = -ENOMEM; goto retake_lock; } - io_end->flag |= EXT4_IO_END_DIRECT; /* * Grab reference for DIO. Will be dropped in ext4_end_io_dio() */ @@ -3147,13 +3140,6 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, if (ret <= 0 && ret != -EIOCBQUEUED && iocb->private) { WARN_ON(iocb->private != io_end); WARN_ON(io_end->flag & EXT4_IO_END_UNWRITTEN); - WARN_ON(io_end->iocb); - /* - * Generic code already did inode_dio_done() so we - * have to clear EXT4_IO_END_DIRECT to not do it for - * the second time. - */ - io_end->flag = 0; ext4_put_io_end(io_end); iocb->private = NULL; } diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 6625d210fb45..d7d0c7b46ed4 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -123,10 +123,6 @@ static void ext4_release_io_end(ext4_io_end_t *io_end) ext4_finish_bio(bio); bio_put(bio); } - if (io_end->flag & EXT4_IO_END_DIRECT) - inode_dio_done(io_end->inode); - if (io_end->iocb) - aio_complete(io_end->iocb, io_end->result, 0); kmem_cache_free(io_end_cachep, io_end); } @@ -204,19 +200,14 @@ static void ext4_add_complete_io(ext4_io_end_t *io_end) struct workqueue_struct *wq; unsigned long flags; - BUG_ON(!(io_end->flag & EXT4_IO_END_UNWRITTEN)); + /* Only reserved conversions from writeback should enter here */ + WARN_ON(!(io_end->flag & EXT4_IO_END_UNWRITTEN)); + WARN_ON(!io_end->handle); spin_lock_irqsave(&ei->i_completed_io_lock, flags); - if (io_end->handle) { - wq = EXT4_SB(io_end->inode->i_sb)->rsv_conversion_wq; - if (list_empty(&ei->i_rsv_conversion_list)) - queue_work(wq, &ei->i_rsv_conversion_work); - list_add_tail(&io_end->list, &ei->i_rsv_conversion_list); - } else { - wq = EXT4_SB(io_end->inode->i_sb)->unrsv_conversion_wq; - if (list_empty(&ei->i_unrsv_conversion_list)) - queue_work(wq, &ei->i_unrsv_conversion_work); - list_add_tail(&io_end->list, &ei->i_unrsv_conversion_list); - } + wq = EXT4_SB(io_end->inode->i_sb)->rsv_conversion_wq; + if (list_empty(&ei->i_rsv_conversion_list)) + queue_work(wq, &ei->i_rsv_conversion_work); + list_add_tail(&io_end->list, &ei->i_rsv_conversion_list); spin_unlock_irqrestore(&ei->i_completed_io_lock, flags); } @@ -256,13 +247,6 @@ void ext4_end_io_rsv_work(struct work_struct *work) ext4_do_flush_completed_IO(&ei->vfs_inode, &ei->i_rsv_conversion_list); } -void ext4_end_io_unrsv_work(struct work_struct *work) -{ - struct ext4_inode_info *ei = container_of(work, struct ext4_inode_info, - i_unrsv_conversion_work); - ext4_do_flush_completed_IO(&ei->vfs_inode, &ei->i_unrsv_conversion_list); -} - ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags) { ext4_io_end_t *io = kmem_cache_zalloc(io_end_cachep, flags); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b59373b625e9..5db4f0df8174 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -762,9 +762,7 @@ static void ext4_put_super(struct super_block *sb) ext4_unregister_li_request(sb); dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); - flush_workqueue(sbi->unrsv_conversion_wq); flush_workqueue(sbi->rsv_conversion_wq); - destroy_workqueue(sbi->unrsv_conversion_wq); destroy_workqueue(sbi->rsv_conversion_wq); if (sbi->s_journal) { @@ -875,14 +873,12 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) #endif ei->jinode = NULL; INIT_LIST_HEAD(&ei->i_rsv_conversion_list); - INIT_LIST_HEAD(&ei->i_unrsv_conversion_list); spin_lock_init(&ei->i_completed_io_lock); ei->i_sync_tid = 0; ei->i_datasync_tid = 0; atomic_set(&ei->i_ioend_count, 0); atomic_set(&ei->i_unwritten, 0); INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); - INIT_WORK(&ei->i_unrsv_conversion_work, ext4_end_io_unrsv_work); return &ei->vfs_inode; } @@ -3954,14 +3950,6 @@ no_journal: goto failed_mount4; } - EXT4_SB(sb)->unrsv_conversion_wq = - alloc_workqueue("ext4-unrsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); - if (!EXT4_SB(sb)->unrsv_conversion_wq) { - printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); - ret = -ENOMEM; - goto failed_mount4; - } - /* * The jbd2_journal_load will have done any necessary log recovery, * so we can safely mount the rest of the filesystem now. @@ -4115,8 +4103,6 @@ failed_mount4: ext4_msg(sb, KERN_ERR, "mount failed"); if (EXT4_SB(sb)->rsv_conversion_wq) destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); - if (EXT4_SB(sb)->unrsv_conversion_wq) - destroy_workqueue(EXT4_SB(sb)->unrsv_conversion_wq); failed_mount_wq: if (sbi->s_journal) { jbd2_journal_destroy(sbi->s_journal); @@ -4564,7 +4550,6 @@ static int ext4_sync_fs(struct super_block *sb, int wait) trace_ext4_sync_fs(sb, wait); flush_workqueue(sbi->rsv_conversion_wq); - flush_workqueue(sbi->unrsv_conversion_wq); /* * Writeback quota in non-journalled quota case - journalled quota has * no dirty dquots @@ -4600,7 +4585,6 @@ static int ext4_sync_fs_nojournal(struct super_block *sb, int wait) trace_ext4_sync_fs(sb, wait); flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq); - flush_workqueue(EXT4_SB(sb)->unrsv_conversion_wq); dquot_writeback_dquots(sb, -1); if (wait && test_opt(sb, BARRIER)) ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 2abf97b2a592..94417a85ce6e 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -565,9 +565,7 @@ bail: static void ocfs2_dio_end_io(struct kiocb *iocb, loff_t offset, ssize_t bytes, - void *private, - int ret, - bool is_async) + void *private) { struct inode *inode = file_inode(iocb->ki_filp); int level; @@ -592,10 +590,6 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, level = ocfs2_iocb_rw_locked_level(iocb); ocfs2_rw_unlock(inode, level); - - inode_dio_done(inode); - if (is_async) - aio_complete(iocb, ret, 0); } /* diff --git a/fs/super.c b/fs/super.c index 68307c029228..5536a95186e2 100644 --- a/fs/super.c +++ b/fs/super.c @@ -152,15 +152,9 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags) static const struct super_operations default_op; if (s) { - if (security_sb_alloc(s)) { - /* - * We cannot call security_sb_free() without - * security_sb_alloc() succeeding. So bail out manually - */ - kfree(s); - s = NULL; - goto out; - } + if (security_sb_alloc(s)) + goto out_free_sb; + #ifdef CONFIG_SMP s->s_files = alloc_percpu(struct list_head); if (!s->s_files) @@ -228,6 +222,7 @@ err_out: free_percpu(s->s_files); #endif destroy_sb_writers(s); +out_free_sb: kfree(s); s = NULL; goto out; @@ -414,6 +409,11 @@ void generic_shutdown_super(struct super_block *sb) evict_inodes(sb); + if (sb->s_dio_done_wq) { + destroy_workqueue(sb->s_dio_done_wq); + sb->s_dio_done_wq = NULL; + } + if (sop->put_super) sop->put_super(sb); diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 596ec71da00e..e11d654af786 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -86,14 +86,6 @@ xfs_destroy_ioend( bh->b_end_io(bh, !ioend->io_error); } - if (ioend->io_iocb) { - inode_dio_done(ioend->io_inode); - if (ioend->io_isasync) { - aio_complete(ioend->io_iocb, ioend->io_error ? - ioend->io_error : ioend->io_result, 0); - } - } - mempool_free(ioend, xfs_ioend_pool); } @@ -281,7 +273,6 @@ xfs_alloc_ioend( * all the I/O from calling the completion routine too early. */ atomic_set(&ioend->io_remaining, 1); - ioend->io_isasync = 0; ioend->io_isdirect = 0; ioend->io_error = 0; ioend->io_list = NULL; @@ -291,8 +282,6 @@ xfs_alloc_ioend( ioend->io_buffer_tail = NULL; ioend->io_offset = 0; ioend->io_size = 0; - ioend->io_iocb = NULL; - ioend->io_result = 0; ioend->io_append_trans = NULL; INIT_WORK(&ioend->io_work, xfs_end_io); @@ -1292,8 +1281,10 @@ __xfs_get_blocks( if (create || !ISUNWRITTEN(&imap)) xfs_map_buffer(inode, bh_result, &imap, offset); if (create && ISUNWRITTEN(&imap)) { - if (direct) + if (direct) { bh_result->b_private = inode; + set_buffer_defer_completion(bh_result); + } set_buffer_unwritten(bh_result); } } @@ -1390,9 +1381,7 @@ xfs_end_io_direct_write( struct kiocb *iocb, loff_t offset, ssize_t size, - void *private, - int ret, - bool is_async) + void *private) { struct xfs_ioend *ioend = iocb->private; @@ -1414,17 +1403,10 @@ xfs_end_io_direct_write( ioend->io_offset = offset; ioend->io_size = size; - ioend->io_iocb = iocb; - ioend->io_result = ret; if (private && size > 0) ioend->io_type = XFS_IO_UNWRITTEN; - if (is_async) { - ioend->io_isasync = 1; - xfs_finish_ioend(ioend); - } else { - xfs_finish_ioend_sync(ioend); - } + xfs_finish_ioend_sync(ioend); } STATIC ssize_t diff --git a/fs/xfs/xfs_aops.h b/fs/xfs/xfs_aops.h index c325abb8d61a..f94dd459dff9 100644 --- a/fs/xfs/xfs_aops.h +++ b/fs/xfs/xfs_aops.h @@ -45,7 +45,6 @@ typedef struct xfs_ioend { unsigned int io_type; /* delalloc / unwritten */ int io_error; /* I/O error code */ atomic_t io_remaining; /* hold count */ - unsigned int io_isasync : 1; /* needs aio_complete */ unsigned int io_isdirect : 1;/* direct I/O */ struct inode *io_inode; /* file being written to */ struct buffer_head *io_buffer_head;/* buffer linked list head */ @@ -54,8 +53,6 @@ typedef struct xfs_ioend { xfs_off_t io_offset; /* offset in the file */ struct work_struct io_work; /* xfsdatad work queue */ struct xfs_trans *io_append_trans;/* xact. for size update */ - struct kiocb *io_iocb; - int io_result; } xfs_ioend_t; extern const struct address_space_operations xfs_address_space_operations; |