dm: allocate buffer for messages with small number of arguments using GFP_NOIO

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dm-mpath and dm-thin must process messages even if some device is
suspended, so we allocate argv buffer with GFP_NOIO. These messages have
a small fixed number of arguments.

On the other hand, dm-switch needs to process bulk data using messages
so excessive use of GFP_NOIO could cause trouble.

The patch also lowers the default number of arguments from 64 to 8, so
that there is smaller load on GFP_NOIO allocations.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Acked-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

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Mikulas Patocka 2013-10-31 13:55:45 -04:00 • committed by Mike Snitzer

parent 61e6cfa80d

commit f36afb3957

1 changed files with 16 additions and 2 deletions

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drivers/md/dm-table.c

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