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Arjan van de Ven 5c81a4197d [PATCH] lockdep: annotate the quota code ... The quota code plays interesting games with the lock ordering; to quote Jan: | i_mutex of inode containing quota file is acquired after all other | quota locks. i_mutex of all other inodes is acquired before quota | locks. Quota code makes sure (by resetting inode operations and | setting special flag on inode) that noone tries to enter quota code | while holding i_mutex on a quota file... The good news is that all of this special case i_mutex grabbing happens in the (per filesystem) low level quota write function. For this special case we need a new I_MUTEX_* nesting level, since this just entirely outside any of the regular VFS locking rules for i_mutex. I trust Jan on his blue eyes that this is not ever going to deadlock; and based on that the patch below is what it takes to inform lockdep of these very interesting new locking rules. The new locking rule for the I_MUTEX_QUOTA nesting level is that this is the deepest possible level of nesting for i_mutex, and that this only should be used in quota write (and possibly read) function of filesystems. This makes the lock ordering of the I_MUTEX_* levels: I_MUTEX_PARENT -> I_MUTEX_CHILD -> I_MUTEX_NORMAL -> I_MUTEX_QUOTA Has no effect on non-lockdep kernels. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Jan Kara <jack@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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Makefile	…
balloc.c	[PATCH] ufs: truncate should allocate block for last byte	19 years ago
cylinder.c	…
dir.c	…
file.c	[PATCH] ufs: truncate should allocate block for last byte	19 years ago
ialloc.c	…
inode.c	[PATCH] ufs: truncate should allocate block for last byte	19 years ago
namei.c	…
super.c	[PATCH] lockdep: annotate the quota code	19 years ago
swab.h	…
symlink.c	…
truncate.c	[PATCH] ufs: truncate should allocate block for last byte	19 years ago
util.c	[PATCH] ufs: truncate should allocate block for last byte	19 years ago
util.h	[PATCH] ufs: truncate should allocate block for last byte	19 years ago