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| author | Jan Kara <jack@suse.cz> | 2012-05-03 14:47:55 +0200 |
|---|---|---|
| committer | Fengguang Wu <fengguang.wu@intel.com> | 2012-05-06 13:43:38 +0800 |
| commit | 365b94ae67d2915d412b593d47449a6bffed9d37 (patch) | |
| tree | ed5d92a05a7c4670439632a20895f523a6553720 | |
| parent | 68809c7108b9a75baf2a888b1c19ce1a4680f600 (diff) | |
| download | op-kernel-dev-365b94ae67d2915d412b593d47449a6bffed9d37.zip op-kernel-dev-365b94ae67d2915d412b593d47449a6bffed9d37.tar.gz | |
writeback: Move clearing of I_SYNC into inode_sync_complete()
Move clearing of I_SYNC into inode_sync_complete(). It is more logical to have
clearing of I_SYNC bit and waking of waiters in one place. Also later we will
have two places needing to clear I_SYNC and wake up waiters so this allows them
to use the common helper. Moving of I_SYNC clearing to a later stage of
writeback_single_inode() is safe since we hold i_lock all the time.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
| -rw-r--r-- | fs/fs-writeback.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 539f36c..dd41437 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -231,11 +231,8 @@ static void requeue_io(struct inode *inode, struct bdi_writeback *wb) static void inode_sync_complete(struct inode *inode) { - /* - * Prevent speculative execution through - * spin_unlock(&wb->list_lock); - */ - + inode->i_state &= ~I_SYNC; + /* Waiters must see I_SYNC cleared before being woken up */ smp_mb(); wake_up_bit(&inode->i_state, __I_SYNC); } @@ -436,7 +433,6 @@ writeback_single_inode(struct inode *inode, struct bdi_writeback *wb, spin_lock(&wb->list_lock); spin_lock(&inode->i_lock); - inode->i_state &= ~I_SYNC; if (!(inode->i_state & I_FREEING)) { /* * Sync livelock prevention. Each inode is tagged and synced in |
