md: add comments in md_flush_request()

Request coalescing logic is dependent on flush time update in other
context. This patch adds comments to understand the code flow better.

Signed-off-by: Pankaj Gupta <pankaj.gupta@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
This commit is contained in:
Pankaj Gupta 2020-11-11 06:16:57 +01:00 • committed by Song Liu
commit 204d1a6434