| To: | Dave Chinner <david@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [regression v4.0-rc1] mm: IPIs from TLB flushes causing significant performance degradation. |
| From: | Ingo Molnar <mingo@xxxxxxxxxx> |
| Date: | Thu, 5 Mar 2015 00:35:45 +0100 |
| Cc: | Mel Gorman <mgorman@xxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Matt B <jackdachef@xxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, linux-mm <linux-mm@xxxxxxxxx>, xfs@xxxxxxxxxxx |
| Delivered-to: | xfs@xxxxxxxxxxx |
| Dkim-signature: | v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; bh=t+Rp/nUxd42TBBecaJ8bqYSrdm75q8E3ICpi/a93uAk=; b=FfM2KLWHe777KRewi7q5M6bKBtpCojURxDqBfBpnmPoCUlSTgjZEK3TpJByelSqdlE mFwYWv9wmPwG/GR5P3nWGKtwfpBw5LAEAraGV32c5kdWD/FsQGB4b2GW2oJ3zVkFA6CX SAddgp4uQZ9Qh83QJ4YtlD7Hlpl3482sk9+UoIgfwTAQxsg91OaZwqAV49Xdiw0XPcmX AGOkOCFTanDlzfavO7QRKq2xsRE/kFFk0V7N44R+Q3Nu34zrbtOneMX15w3UWlh93JPw 2xUpJJ9r0eGjXJ7qXl9+f1D9AAkWEiCjtomg8LIjduIqZF7luu26ARyV+ZSDibtEUwiJ BZ+g== |
| In-reply-to: | <20150304230045.GZ18360@dastard> |
| References: | <20150303014733.GL18360@dastard> <CA+55aFw+7V9DfxBA2_DhMNrEQOkvdwjFFga5Y67-a6yVeAz+NQ@xxxxxxxxxxxxxx> <CA+55aFw+fb=Fh4M2wA4dVskgqN7PhZRGZS6JTMx4Rb1Qn++oaA@xxxxxxxxxxxxxx> <20150303052004.GM18360@dastard> <CA+55aFyczb5asoTwhzaJr1JdRi1epg1A6cFJgnzMMZj6U0gFWA@xxxxxxxxxxxxxx> <20150303113437.GR4251@dastard> <20150303134346.GO3087@xxxxxxx> <20150303213353.GS4251@dastard> <20150304200046.GP3087@xxxxxxx> <20150304230045.GZ18360@dastard> |
| Sender: | Ingo Molnar <mingo.kernel.org@xxxxxxxxx> |
| User-agent: | Mutt/1.5.23 (2014-03-12) |
* Dave Chinner <david@xxxxxxxxxxxxx> 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
|
| Previous by Date: | Re: How to handle TIF_MEMDIE stalls?, Dave Chinner |
|---|---|
| Next by Date: | Re: [regression v4.0-rc1] mm: IPIs from TLB flushes causing significant performance degradation., Dave Chinner |
| Previous by Thread: | Re: [regression v4.0-rc1] mm: IPIs from TLB flushes causing significant performance degradation., Dave Chinner |
| Next by Thread: | Re: [regression v4.0-rc1] mm: IPIs from TLB flushes causing significant performance degradation., Dave Chinner |
| Indexes: | [Date] [Thread] [Top] [All Lists] |