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introduce I_SYNC

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I_LOCK was used for several unrelated purposes, which caused deadlock
situations in certain filesystems as a side effect.  One of the purposes
now uses the new I_SYNC bit.

Also document the various bits and change their order from historical to
logical.

[[email protected]: make fs/inode.c:wake_up_inode() static]
Signed-off-by: Joern Engel <[email protected]>
Cc: Dave Kleikamp <[email protected]>
Cc: David Chinner <[email protected]>
Cc: Anton Altaparmakov <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Signed-off-by: Adrian Bunk <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Joern Engel 2007-10-16 23:30:44 -07:00 • committed by Linus Torvalds
commit 1c0eeaf569
8 changed files with 116 additions and 42 deletions
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2
mm/page-writeback.c
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@ -37,7 +37,7 @@
/*
* The maximum number of pages to writeout in a single bdflush/kupdate
* operation. We do this so we don't hold I_LOCK against an inode for
* operation. We do this so we don't hold I_SYNC against an inode for
* enormous amounts of time, which would block a userspace task which has
* been forced to throttle against that inode. Also, the code reevaluates
* the dirty each time it has written this many pages.