From: Ingo Molnar <mingo@kernel.org>
To: Dave Chinner <david@fromorbit.com>
Cc: Mel Gorman <mgorman@suse.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Matt B <jackdachef@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
xfs@oss.sgi.com
Subject: Re: [regression v4.0-rc1] mm: IPIs from TLB flushes causing significant performance degradation.
Date: Thu, 5 Mar 2015 00:35:45 +0100 [thread overview]
Message-ID: <20150304233544.GA24733@gmail.com> (raw)
In-Reply-To: <20150304230045.GZ18360@dastard>
* Dave Chinner <david@fromorbit.com> wrote:
> > After going through the series again, I did not spot why there is
> > a difference. It's functionally similar and I would hate the
> > theory that this is somehow hardware related due to the use of
> > bits it takes action on.
>
> I doubt it's hardware related - I'm testing inside a VM, [...]
That might be significant, I doubt Mel considered KVM's interpretation
of pte details?
Thanks,
Ingo
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next prev parent reply other threads:[~2015-03-04 23:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
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 [this message]
2015-03-04 23:51 ` Dave Chinner
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