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[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

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This patch converts the inode semaphore to a mutex. I have tested it on
XFS and compiled as much as one can consider on an ia64. Anyway your
luck with it might be different.

Modified-by: Ingo Molnar <mingo@elte.hu>

(finished the conversion)

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jes Sorensen 2006-01-09 15:59:24 -08:00 • committed by Ingo Molnar
parent 794ee1baee
commit 1b1dcc1b57
113 changed files with 563 additions and 573 deletions
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8
mm/rmap.c
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@ -20,13 +20,13 @@
/*
* Lock ordering in mm:
*
* inode->i_sem (while writing or truncating, not reading or faulting)
* inode->i_mutex (while writing or truncating, not reading or faulting)
* inode->i_alloc_sem
*
* When a page fault occurs in writing from user to file, down_read
* of mmap_sem nests within i_sem; in sys_msync, i_sem nests within
* down_read of mmap_sem; i_sem and down_write of mmap_sem are never
* taken together; in truncation, i_sem is taken outermost.
* of mmap_sem nests within i_mutex; in sys_msync, i_mutex nests within
* down_read of mmap_sem; i_mutex and down_write of mmap_sem are never
* taken together; in truncation, i_mutex is taken outermost.
*
* mm->mmap_sem
* page->flags PG_locked (lock_page)