GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[PATCH] aio: revert lock_kiocb()

Browse source 
lock_kiocb() was introduced to serialize retrying and cancellation.  In the
process of doing so it tried to sleep waiting for KIF_LOCKED while holding
the ctx_lock spinlock.  Recent fixes have ensured that multiple concurrent
retries won't be attempted for a given iocb.  Cancel has other problems and
has no significant in-tree users that have been complaining about it.  So
for the immediate future we'll revert sleeping with the lock held and will
address proper cancellation and retry serialization in the future.

Signed-off-by: Zach Brown <zach.brown@oracle.com>
Acked-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Zach Brown 2005-10-17 16:43:33 -07:00 • committed by Linus Torvalds
parent e7507ed91e
commit 4faa528528
2 changed files with 7 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

7
include/linux/aio.h
View file

@ -24,7 +24,12 @@ struct kioctx;
#define KIOCB_SYNC_KEY (~0U)
/* ki_flags bits */
#define KIF_LOCKED 0
/*
* This may be used for cancel/retry serialization in the future, but
* for now it's unused and we probably don't want modules to even
* think they can use it.
*/
/* #define KIF_LOCKED 0 */
#define KIF_KICKED 1
#define KIF_CANCELLED 2