From: Ilya Dryomov <idryomov@gmail.com>
Date: Sat, 14 Aug 2021 17:06:28 +0000 (+0200)
Subject: librbd/cache/pwl: make pool size a multiple of 1M
X-Git-Tag: v16.2.7~50^2~24
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=5b7a468eadb18ac8f91681ec91da2e50b6ad53a2;p=ceph.git

librbd/cache/pwl: make pool size a multiple of 1M

In ssd mode, we need it to be a multiple of bdev block size.
Instead of munging it after opening the bdev in ssd/WriteLog.cc, let's
impose a common restriction and round rbd_persistent_cache_size down to
a 1M boundary.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
(cherry picked from commit 1fc722bc218acfe8a52ad7be2c06347bddb42bbe)
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