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From: Matt <jackdachef@gmail.com>
To: Dave Chinner <david@fromorbit.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Will Deacon <will.deacon@arm.com>, Dave Hansen <dave@sr71.net>
Subject: [regression v4.0-rc1] mm: IPIs from TLB flushes causing significant performance degradation.
Date: Mon, 2 Mar 2015 20:17:22 +0100	[thread overview]
Message-ID: <CAG-aW04bcQf-Li7ciNjXe086_XqGbUe0=gq4NH_yoJ8ns6G8eQ@mail.gmail.com> (raw)

Hi Dave,


is the following thread and patch related to your problem,

I just happened to stumble upon it a few days ago:

https://lkml.org/lkml/2014/12/17/280 ,
http://marc.info/?l=linux-kernel&m=141876582909898&w=2
Re: post-3.18 performance regression in TLB flushing code

Linus already posted a fix to the problem, however I can't seem to
find the matching commit in his tree (searching for "TLC regression"
or "TLB cache").


Kind Regards

Matt

             reply	other threads:[~2015-03-02 19:17 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-02 19:17 Matt [this message]
2015-03-02 19:25 ` Dave Hansen
2015-03-02 19:45   ` Matt
  -- strict thread matches above, loose matches on Subject: below --
2015-03-02  1:04 Dave Chinner
2015-03-02 19:47 ` Linus Torvalds
2015-03-03  1:47   ` Dave Chinner
2015-03-03  2:22     ` Linus Torvalds
2015-03-03  2:37       ` Linus Torvalds
2015-03-03  5:20         ` Dave Chinner
2015-03-03  6:56           ` Linus Torvalds
2015-03-03 11:34             ` Dave Chinner
2015-03-03 13:43               ` Mel Gorman
2015-03-03 21:33                 ` Dave Chinner
2015-03-04 20:00                   ` Mel Gorman
2015-03-04 23:00                     ` Dave Chinner
2015-03-04 23:35                       ` Ingo Molnar
2015-03-04 23:51                         ` Dave Chinner

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