dm crypt: use io thread for reads only if mempool exhausted

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If there is enough memory, code can directly submit bio
instead queing this operation in separate thread.

Try to alloc bio clone with GFP_NOWAIT and only if it
fails use separate queue (map function cannot block here).

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

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Milan Broz 2011-01-13 19:59:53 +00:00 • committed by Alasdair G Kergon

parent c029772125

commit 20c82538e4

1 changed files with 23 additions and 14 deletions

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37

drivers/md/dm-crypt.c

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