lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Tue, 4 Apr 2017 15:07:03 -0700
From:   Andrew Morton <>
To:     Johannes Weiner <>
Cc:     Rik van Riel <>, Mel Gorman <>,
        Michal Hocko <>,
        Vladimir Davydov <>,,,,
Subject: Re: [PATCH] mm: vmscan: fix IO/refault regression in cache
 workingset transition

On Tue,  4 Apr 2017 18:00:52 -0400 Johannes Weiner <> wrote:

> Since 59dc76b0d4df ("mm: vmscan: reduce size of inactive file list")
> we noticed bigger IO spikes during changes in cache access patterns.
> The patch in question shrunk the inactive list size to leave more room
> for the current workingset in the presence of streaming IO. However,
> workingset transitions that previously happened on the inactive list
> are now pushed out of memory and incur more refaults to complete.
> This patch disables active list protection when refaults are being
> observed. This accelerates workingset transitions, and allows more of
> the new set to establish itself from memory, without eating into the
> ability to protect the established workingset during stable periods.
> Fixes: 59dc76b0d4df ("mm: vmscan: reduce size of inactive file list")
> Signed-off-by: Johannes Weiner <>
> Cc: <> # 4.7+

That's a pretty large patch and the problem has been there for a year. 
I'm not sure that it's 4.11 material, let alone -stable.  Care to
explain further?

Powered by blists - more mailing lists