tree c6d18d969b76f61ebbfa777caf2706af5873a98f
parent 451a9ebf653d28337ba53ed5b4b70b0b9543cca1
author Tejun Heo <tj@kernel.org> 1239801027 +0900
committer Jens Axboe <jens.axboe@oracle.com> 1240382110 +0200

bio: use bio_kmalloc() in copy/map functions

Impact: remove possible deadlock condition

There is no reason to use mempool backed allocation for map functions.
Also, because kern mapping is used inside LLDs (e.g. for EH), using
mempool backed allocation can lead to deadlock under extreme
conditions (mempool already consumed by the time a request reached EH
and requests are blocked on EH).

Switch copy/map functions to bio_kmalloc().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>