From: "H. Peter Anvin" <hpa@zytor.com>
To: Hugh Dickins <hughd@google.com>
Cc: Shaohua Li <shaohua.li@intel.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Andi Kleen <andi@firstfloor.org>
Subject: Re: [patch]x86: avoid unnecessary tlb flush
Date: Fri, 13 Aug 2010 14:08:25 -0700 [thread overview]
Message-ID: <4C65B449.4010905@zytor.com> (raw)
In-Reply-To: <alpine.DEB.1.00.1008131222110.26182@tigran.mtv.corp.google.com>
On 08/13/2010 12:29 PM, Hugh Dickins wrote:
>
> Just added Andrea to the Cc list: he did that TLB flush in 1a44e149,
> I'd feel more comfortable noop-ing it on x86 if you've convinced him.
>
> Hugh
Andrea is probably on his way back from LinuxCon, but looking at the
original patch it might be something that non-x86 architectures need,
but which can be optimized specifically on x86, since x86 has explicit
"no flush needed when going to more permissive" semantics.
-hpa
next prev parent reply other threads:[~2010-08-13 21:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-06 3:28 [patch]x86: avoid unnecessary tlb flush Shaohua Li
2010-08-06 5:19 ` Andrew Morton
2010-08-13 0:47 ` Shaohua Li
2010-08-13 19:29 ` Hugh Dickins
2010-08-13 21:08 ` H. Peter Anvin [this message]
2010-08-13 23:00 ` Suresh Siddha
2010-08-16 1:16 ` Shaohua Li
2010-08-23 0:43 ` Shaohua Li
2010-08-23 17:57 ` [tip:x86/mm] x86, mm: Avoid unnecessary TLB flush tip-bot for Shaohua Li
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