md/raid1: introduce wait_for_serialization

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Previously, we call check_and_add_serial when serialization is
enabled for write IO, but it could allocate and free memory
back and forth.

Now, let's just get an element from memory pool with the new
function, then insert node to rb tree if no collision happens.

Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>

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Guoqing Jiang 2019-12-23 10:49:02 +01:00 • committed by Song Liu

parent 025471f9f5

commit d0d2d8ba04

1 changed files with 22 additions and 19 deletions

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drivers/md/raid1.c

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