From: "Kirill A. Shutemov" <kirill@shutemov•name>
To: Andrea Arcangeli <aarcange@redhat•com>
Cc: linux-mips@linux-mips•org, linux-sh@vger•kernel.org,
Jan Beulich <jbeulich@novell•com>,
linux-mm@kvack•org, "H. Peter Anvin" <hpa@zytor•com>,
sparclinux@vger•kernel.org, Andi Kleen <ak@linux•intel.com>,
Robert Richter <robert.richter@amd•com>,
x86@kernel•org, Hugh Dickins <hughd@google•com>,
Ingo Molnar <mingo@redhat•com>, Mel Gorman <mgorman@suse•de>,
Alex Shi <alex.shu@intel•com>,
Thomas Gleixner <tglx@linutronix•de>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp•fujitsu.com>,
Tim Chen <tim.c.chen@linux•intel.com>,
linux-kernel@vger•kernel.org,
Andy Lutomirski <luto@amacapital•net>,
Johannes Weiner <hannes@cmpxchg•org>,
Andrew Morton <akpm@linux-foundation•org>,
linuxppc-dev@lists•ozlabs.org,
"Kirill A. Shutemov" <kirill.shutemov@linux•intel.com>
Subject: Re: [PATCH v3 6/7] mm: make clear_huge_page cache clear only around the fault address
Date: Thu, 16 Aug 2012 21:37:25 +0300 [thread overview]
Message-ID: <20120816183725.GA30284@shutemov.name> (raw)
In-Reply-To: <20120816182944.GN11188@redhat.com>
On Thu, Aug 16, 2012 at 08:29:44PM +0200, Andrea Arcangeli wrote:
> On Thu, Aug 16, 2012 at 07:43:56PM +0300, Kirill A. Shutemov wrote:
> > Hm.. I think with static_key we can avoid cache overhead here. I'll try.
>
> Could you elaborate on the static_key? Is it some sort of self
> modifying code?
Runtime code patching. See Documentation/static-keys.txt. We can patch it
on sysctl.
>
> > Thanks, for review. Could you take a look at huge zero page patchset? ;)
>
> I've noticed that too, nice :). I'm checking some detail on the
> wrprotect fault behavior but I'll comment there.
>
> --
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--
Kirill A. Shutemov
next prev parent reply other threads:[~2012-08-16 18:37 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-16 15:15 [PATCH v3 0/7] Avoid cache trashing on clearing huge/gigantic page Kirill A. Shutemov
2012-08-16 15:15 ` [PATCH v3 1/7] THP: Use real address for NUMA policy Kirill A. Shutemov
2012-08-16 15:15 ` [PATCH v3 2/7] THP: Pass fault address to __do_huge_pmd_anonymous_page() Kirill A. Shutemov
2012-08-16 15:15 ` [PATCH v3 3/7] hugetlb: pass fault address to hugetlb_no_page() Kirill A. Shutemov
2012-08-16 15:15 ` [PATCH v3 4/7] mm: pass fault address to clear_huge_page() Kirill A. Shutemov
2012-08-16 15:15 ` [PATCH v3 5/7] x86: Add clear_page_nocache Kirill A. Shutemov
2012-08-16 15:15 ` [PATCH v3 6/7] mm: make clear_huge_page cache clear only around the fault address Kirill A. Shutemov
2012-08-16 16:16 ` Andrea Arcangeli
2012-08-16 16:43 ` Kirill A. Shutemov
2012-08-16 18:29 ` Andrea Arcangeli
2012-08-16 18:37 ` Kirill A. Shutemov [this message]
2012-08-16 19:42 ` Andrea Arcangeli
2012-08-16 15:15 ` [PATCH v3 7/7] x86: switch the 64bit uncached page clear to SSE/AVX v2 Kirill A. Shutemov
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