raid5-ppl: move no_mem_stripes to struct ppl_conf

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Use a single no_mem_stripes list instead of per member device lists for
handling stripes that need retrying in case of failed io_unit
allocation. Because io_units are allocated from a memory pool shared
between all member disks, the no_mem_stripes list should be checked when
an io_unit for any member is freed. This fixes a deadlock that could
happen if there are stripes in more than one no_mem_stripes list.

Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>

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Artur Paszkiewicz 2017-04-04 13:13:56 +02:00 • committed by Shaohua Li

parent 0c9d5b127f

commit 94568f64af

1 changed files with 23 additions and 13 deletions

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36

drivers/md/raid5-ppl.c

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