From: Andrea Arcangeli <aarcange@redhat.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
linux-mm@kvack.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Andi Kleen <ak@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Alex Shi <alex.shu@intel.com>, Jan Beulich <jbeulich@novell.com>,
Robert Richter <robert.richter@amd.com>,
Andy Lutomirski <luto@amacapital.net>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Hugh Dickins <hughd@google.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-mips@linux-mips.org, linux-sh@vger.kernel.org,
sparclinux@vger.kernel.org
Subject: Re: [PATCH v3 6/7] mm: make clear_huge_page cache clear only around the fault address
Date: Thu, 16 Aug 2012 21:42:10 +0200 [thread overview]
Message-ID: <20120816194210.GR11188@redhat.com> (raw)
In-Reply-To: <20120816183725.GA30284@shutemov.name>
On Thu, Aug 16, 2012 at 09:37:25PM +0300, Kirill A. Shutemov wrote:
> 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.
I guessed it had to be patching the code, thanks for the
pointer. It looks a perfect fit for this one agreed.
WARNING: multiple messages have this Message-ID (diff)
From: Andrea Arcangeli <aarcange@redhat.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
linux-mm@kvack.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Andi Kleen <ak@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Alex Shi <alex.shu@intel.com>, Jan Beulich <jbeulich@novell.com>,
Robert Richter <robert.richter@amd.com>,
Andy Lutomirski <luto@amacapital.net>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Hugh Dickins <hughd@google.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-mips@linux-mips.org, linux-sh@vger.kernel.org,
sparclinux@vger.kernel.org
Subject: Re: [PATCH v3 6/7] mm: make clear_huge_page cache clear only around the fault address
Date: Thu, 16 Aug 2012 19:42:10 +0000 [thread overview]
Message-ID: <20120816194210.GR11188@redhat.com> (raw)
In-Reply-To: <20120816183725.GA30284@shutemov.name>
On Thu, Aug 16, 2012 at 09:37:25PM +0300, Kirill A. Shutemov wrote:
> 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.
I guessed it had to be patching the code, thanks for the
pointer. It looks a perfect fit for this one agreed.
WARNING: multiple messages have this Message-ID (diff)
From: Andrea Arcangeli <aarcange@redhat.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
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 21:42:10 +0200 [thread overview]
Message-ID: <20120816194210.GR11188@redhat.com> (raw)
In-Reply-To: <20120816183725.GA30284@shutemov.name>
On Thu, Aug 16, 2012 at 09:37:25PM +0300, Kirill A. Shutemov wrote:
> 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.
I guessed it had to be patching the code, thanks for the
pointer. It looks a perfect fit for this one agreed.
WARNING: multiple messages have this Message-ID (diff)
From: Andrea Arcangeli <aarcange@redhat.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
linux-mm@kvack.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Andi Kleen <ak@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Alex Shi <alex.shu@intel.com>, Jan Beulich <jbeulich@novell.com>,
Robert Richter <robert.richter@amd.com>,
Andy Lutomirski <luto@amacapital.net>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Hugh Dickins <hughd@google.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-mips@linux-mips.org, linux-sh@vger.kernel.org,
sparclinux@vger.kernel.org
Subject: Re: [PATCH v3 6/7] mm: make clear_huge_page cache clear only around the fault address
Date: Thu, 16 Aug 2012 21:42:10 +0200 [thread overview]
Message-ID: <20120816194210.GR11188@redhat.com> (raw)
In-Reply-To: <20120816183725.GA30284@shutemov.name>
On Thu, Aug 16, 2012 at 09:37:25PM +0300, Kirill A. Shutemov wrote:
> 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.
I guessed it had to be patching the code, thanks for the
pointer. It looks a perfect fit for this one agreed.
--
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next prev parent reply other threads:[~2012-08-16 19:42 UTC|newest]
Thread overview: 52+ 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 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` 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 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` 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 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` 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 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` 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 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` 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 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` 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 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 16:16 ` Andrea Arcangeli
2012-08-16 16:16 ` Andrea Arcangeli
2012-08-16 16:16 ` Andrea Arcangeli
2012-08-16 16:16 ` Andrea Arcangeli
2012-08-16 16:43 ` Kirill A. Shutemov
2012-08-16 16:43 ` Kirill A. Shutemov
2012-08-16 16:43 ` Kirill A. Shutemov
2012-08-16 16:43 ` Kirill A. Shutemov
2012-08-16 18:29 ` Andrea Arcangeli
2012-08-16 18:29 ` Andrea Arcangeli
2012-08-16 18:29 ` Andrea Arcangeli
2012-08-16 18:29 ` Andrea Arcangeli
2012-08-16 18:37 ` Kirill A. Shutemov
2012-08-16 18:37 ` Kirill A. Shutemov
2012-08-16 18:37 ` Kirill A. Shutemov
2012-08-16 18:37 ` Kirill A. Shutemov
2012-08-16 19:42 ` Andrea Arcangeli [this message]
2012-08-16 19:42 ` Andrea Arcangeli
2012-08-16 19:42 ` Andrea Arcangeli
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
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
2012-08-16 15:15 ` Kirill A. Shutemov
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