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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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1
include/linux/writeback.h
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@ -10,6 +10,7 @@
struct backing_dev_info;
extern spinlock_t inode_lock;
extern spinlock_t inode_wb_list_lock;
/*
* fs/fs-writeback.c