linux-kernel - Re: [PATCH v2 0/2] mm/damon: Fix fake /proc/loadavg reports

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Date:   Fri, 26 Nov 2021 14:41:30 +0000
From:   SeongJae Park <sj@...nel.org>
To:     Oleksandr Natalenko <oleksandr@...alenko.name>
Cc:     akpm@...ux-foundation.org, SeongJae Park <sj@...nel.org>,
        john.stultz@...aro.org, tglx@...utronix.de, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] mm/damon: Fix fake /proc/loadavg reports

On Fri, 26 Nov 2021 15:37:12 +0100 Oleksandr Natalenko <oleksandr@...alenko.name> wrote:

> Hello.
> 
> On čtvrtek 25. listopadu 2021 17:08:28 CET SeongJae Park wrote:
> > This patchset fixes DAMON's fake load report issue.  The first patch
> > makes yet another variant of usleep_range() for this fix, and the second
> > patch fixes the issue of DAMON by making it using the newly introduced
> > function.
> > 
> > I think these need to be applied on v5.15.y, but the second patch cannot
> > cleanly applied there as is.  I will back-port this on v5.15.y and post
> > later once this is merged in the mainline.  If you think this is not
> > appropriate for stable tree, please let me know.
> > 
> > Changelog
> > ---------
> > 
> > >From v1
> > 
> > (https://lore.kernel.org/linux-mm/20211124145219.32866-1-sj@kernel.org/)
> > - Avoid copy-and-pasting usleep_delay() in DAMON code (Andrew Morton)
> > 
> > SeongJae Park (2):
> >   timers: Implement usleep_idle_range()
> >   mm/damon/core: Fix fake load reports due to uninterruptible sleeps
> > 
> >  include/linux/delay.h | 14 +++++++++++++-
> >  kernel/time/timer.c   | 16 +++++++++-------
> >  mm/damon/core.c       |  6 +++---
> >  3 files changed, 25 insertions(+), 11 deletions(-)
> 
> I'd appreciate if you Cc me as a reporter since I'm going to test this.

Oops, sorry for forgetting that.  I also forgot adding 'Suggested-by:' for
Andrew Morton on the first patch.  I will do that and resend, Cc-ing you.

> 
> Thanks.
> 
> -- 
> Oleksandr Natalenko (post-factum)
>