path: root/drivers
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authorZach Brown <>2005-11-13 16:07:33 -0800
committerLinus Torvalds <>2005-11-13 18:14:16 -0800
commit20dcae32439384b6863c626bb3b2a09bed65b33e (patch)
tree9750c39119447fb32963448bf1935e1ba22b2f9d /drivers
parent4557398f8cbaf9f254cff747534b4724c7f75c4f (diff)
[PATCH] aio: remove kioctx from mm_struct
Sync iocbs have a life cycle that don't need a kioctx. Their retrying, if any, is done in the context of their owner who has allocated them on the stack. The sole user of a sync iocb's ctx reference was aio_complete() checking for an elevated iocb ref count that could never happen. No path which grabs an iocb ref has access to sync iocbs. If we were to implement sync iocb cancelation it would be done by the owner of the iocb using its on-stack reference. Removing this chunk from aio_complete allows us to remove the entire kioctx instance from mm_struct, reducing its size by a third. On a i386 testing box the slab size went from 768 to 504 bytes and from 5 to 8 per page. Signed-off-by: Zach Brown <> Acked-by: Benjamin LaHaise <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions