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fs: move i_wb_list out from under inode_lock

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Protect the inode writeback list with a new global lock
inode_wb_list_lock and use it to protect the list manipulations and
traversals. This lock replaces the inode_lock as the inodes on the
list can be validity checked while holding the inode->i_lock and
hence the inode_lock is no longer needed to protect the list.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Dave Chinner
2011-03-22 22:23:41 +11:00
committed by Al Viro
parent 55fa6091d8
commit a66979abad
8 changed files with 70 additions and 48 deletions
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5
fs/internal.h
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@@ -127,6 +127,11 @@ extern long do_handle_open(int mountdirfd,
*/
extern spinlock_t inode_sb_list_lock;
/*
* fs-writeback.c
*/
extern void inode_wb_list_del(struct inode *inode);
extern int get_nr_dirty_inodes(void);
extern void evict_inodes(struct super_block *);
extern int invalidate_inodes(struct super_block *, bool);