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Date: Thu, 5 Mar 2015 00:35:45 +0100 From: Ingo Molnar <mingo@...nel.org> To: Dave Chinner <david@...morbit.com> Cc: Mel Gorman <mgorman@...e.de>, Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org>, Matt B <jackdachef@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, xfs@....sgi.com Subject: Re: [regression v4.0-rc1] mm: IPIs from TLB flushes causing significant performance degradation. * Dave Chinner <david@...morbit.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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