From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Pavel Emelyanov <xemul@parallels.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrea Arcangeli <aarcange@redhat.com>,
Dave Hansen <dave.hansen@intel.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Subject: Re: [PATCH] mm: /prom/pid/clear_refs: avoid split_huge_page()
Date: Thu, 22 May 2014 12:35:06 +0400 [thread overview]
Message-ID: <20140522083506.GC8946@moon> (raw)
In-Reply-To: <20140522053247.GA8946@moon>
On Thu, May 22, 2014 at 09:32:47AM +0400, Cyrill Gorcunov wrote:
> On Thu, May 22, 2014 at 04:11:10AM +0300, Kirill A. Shutemov wrote:
> > Andrew Morton wrote:
> > > On Wed, 21 May 2014 22:04:22 +0300 "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
> > >
> > > > Currently we split all THP pages on any clear_refs request. It's not
> > > > necessary. We can handle this on PMD level.
> > > >
> > > > One side effect is that soft dirty will potentially see more dirty
> > > > memory, since we will mark whole THP page dirty at once.
> > >
> > > This clashes pretty badly with
> > > http://ozlabs.org/~akpm/mmots/broken-out/clear_refs-redefine-callback-functions-for-page-table-walker.patch
> >
> > Hm.. For some reason CRIU memory-snapshotting test cases fail on current
> > linux-next. I didn't debug why. Mainline works. Folks?
>
> Thanks for noticing, Kirill! I don't test linux-test regulary will try and
> report the results.
OK, I managed to run criu on linux-next. Due to changes in vdso it no longer
able to run. I'll handle it in criu and ping you then.
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WARNING: multiple messages have this Message-ID (diff)
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Pavel Emelyanov <xemul@parallels.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrea Arcangeli <aarcange@redhat.com>,
Dave Hansen <dave.hansen@intel.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Subject: Re: [PATCH] mm: /prom/pid/clear_refs: avoid split_huge_page()
Date: Thu, 22 May 2014 12:35:06 +0400 [thread overview]
Message-ID: <20140522083506.GC8946@moon> (raw)
In-Reply-To: <20140522053247.GA8946@moon>
On Thu, May 22, 2014 at 09:32:47AM +0400, Cyrill Gorcunov wrote:
> On Thu, May 22, 2014 at 04:11:10AM +0300, Kirill A. Shutemov wrote:
> > Andrew Morton wrote:
> > > On Wed, 21 May 2014 22:04:22 +0300 "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
> > >
> > > > Currently we split all THP pages on any clear_refs request. It's not
> > > > necessary. We can handle this on PMD level.
> > > >
> > > > One side effect is that soft dirty will potentially see more dirty
> > > > memory, since we will mark whole THP page dirty at once.
> > >
> > > This clashes pretty badly with
> > > http://ozlabs.org/~akpm/mmots/broken-out/clear_refs-redefine-callback-functions-for-page-table-walker.patch
> >
> > Hm.. For some reason CRIU memory-snapshotting test cases fail on current
> > linux-next. I didn't debug why. Mainline works. Folks?
>
> Thanks for noticing, Kirill! I don't test linux-test regulary will try and
> report the results.
OK, I managed to run criu on linux-next. Due to changes in vdso it no longer
able to run. I'll handle it in criu and ping you then.
next prev parent reply other threads:[~2014-05-22 8:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-21 19:04 [PATCH] mm: /prom/pid/clear_refs: avoid split_huge_page() Kirill A. Shutemov
2014-05-21 19:04 ` Kirill A. Shutemov
2014-05-21 19:19 ` Cyrill Gorcunov
2014-05-21 19:19 ` Cyrill Gorcunov
2014-05-21 19:34 ` Andrew Morton
2014-05-21 19:34 ` Andrew Morton
2014-05-21 19:57 ` Cyrill Gorcunov
2014-05-21 19:57 ` Cyrill Gorcunov
2014-05-22 1:11 ` Kirill A. Shutemov
2014-05-22 1:11 ` Kirill A. Shutemov
2014-05-22 5:32 ` Cyrill Gorcunov
2014-05-22 5:32 ` Cyrill Gorcunov
2014-05-22 8:35 ` Cyrill Gorcunov [this message]
2014-05-22 8:35 ` Cyrill Gorcunov
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