diff options
| author | Dave Chinner <dchinner@redhat.com> | 2011-07-08 14:14:43 +1000 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-07-20 20:47:40 -0400 |
| commit | 4f8c19fdf3f97402b68f058b1c72a6c7166c9e59 (patch) | |
| tree | 1e986c639955955f6191c46bcfa831e6bb466d60 | |
| parent | b0d40c92adafde7c2d81203ce7c1c69275f41140 (diff) | |
inode: remove iprune_sem
Now that we have per-sb shrinkers with a lifecycle that is a subset
of the superblock lifecycle and can reliably detect a filesystem
being unmounted, there is not longer any race condition for the
iprune_sem to protect against. Hence we can remove it.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/inode.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/fs/inode.c b/fs/inode.c index 1fdbb64a952..cf81baf1898 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -68,17 +68,6 @@ __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_sb_list_lock); __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_wb_list_lock); /* - * iprune_sem provides exclusion between the icache shrinking and the - * umount path. - * - * We don't actually need it to protect anything in the umount path, - * but only need to cycle through it to make sure any inode that - * prune_icache_sb took off the LRU list has been fully torn down by the - * time we are past evict_inodes. - */ -static DECLARE_RWSEM(iprune_sem); - -/* * Empty aops. Can be used for the cases where the user does not * define any of the address_space operations. */ @@ -542,14 +531,6 @@ void evict_inodes(struct super_block *sb) spin_unlock(&inode_sb_list_lock); dispose_list(&dispose); - - /* - * Cycle through iprune_sem to make sure any inode that prune_icache_sb - * moved off the list before we took the lock has been fully torn - * down. - */ - down_write(&iprune_sem); - up_write(&iprune_sem); } /** @@ -635,7 +616,6 @@ void prune_icache_sb(struct super_block *sb, int nr_to_scan) int nr_scanned; unsigned long reap = 0; - down_read(&iprune_sem); spin_lock(&sb->s_inode_lru_lock); for (nr_scanned = nr_to_scan; nr_scanned >= 0; nr_scanned--) { struct inode *inode; @@ -711,7 +691,6 @@ void prune_icache_sb(struct super_block *sb, int nr_to_scan) spin_unlock(&sb->s_inode_lru_lock); dispose_list(&freeable); - up_read(&iprune_sem); } static void __wait_on_freeing_inode(struct inode *inode); |