Re: [PATCH 5.4 024/138] dm mpath: pass IO start time to path selector

Greg Kroah-Hartman gregkh@linuxfoundation.org writes:

From: Gabriel Krisman Bertazi krisman@collabora.com

[ Upstream commit 087615bf3acdafd0ba7c7c9ed5286e7b7c80fe1b ]

The HST path selector needs this information to perform path prediction. For request-based mpath, struct request's io_start_time_ns is used, while for bio-based, use the start_time stored in dm_io.

Hi Greg,

This patch is not -stable material. It is only needed for a new feature merged in 5.8.

Thanks,