From: Andrew Morton <akpm@digeo.com>
To: Benjamin LaHaise <bcrl@redhat.com>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>,
Rik van Riel <riel@conectiva.com.br>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Bill Davidsen <davidsen@tmr.com>,
Dave McCracken <dmccr@us.ibm.com>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Linux Memory Management <linux-mm@kvack.org>
Subject: Re: [PATCH 2.5.43-mm2] New shared page table patch
Date: Tue, 22 Oct 2002 10:56:04 -0700 [thread overview]
Message-ID: <3DB59134.38AA41F6@digeo.com> (raw)
In-Reply-To: 20021022134501.C20957@redhat.com
Benjamin LaHaise wrote:
>
> On Tue, Oct 22, 2002 at 10:36:40AM -0700, Martin J. Bligh wrote:
> > Bear in mind that large pages are neither swap backed or file backed
> > (vetoed by Linus), for starters. There are other large app problem scenarios
> > apart from Oracle ;-)
>
> I think the fact that large page support doesn't support mmap for users
> that need it is utterly appauling; there are numerous places where it is
> needed. The requirement for root-only access makes it useless for most
> people, especially in HPC environments where it is most needed as such
> machines are usually shared and accounts are non-priveledged.
>
Have you reviewed the hugetlbfs and hugetlbpage-backed-shm patches?
That code is still requiring CAP_IPC_LOCK, although I suspect it
would be better to allow hugetlbfs mmap to be purely administered
by file permissions.
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Morton <akpm@digeo.com>
To: Benjamin LaHaise <bcrl@redhat.com>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>,
Rik van Riel <riel@conectiva.com.br>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Bill Davidsen <davidsen@tmr.com>,
Dave McCracken <dmccr@us.ibm.com>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Linux Memory Management <linux-mm@kvack.org>
Subject: Re: [PATCH 2.5.43-mm2] New shared page table patch
Date: Tue, 22 Oct 2002 10:56:04 -0700 [thread overview]
Message-ID: <3DB59134.38AA41F6@digeo.com> (raw)
In-Reply-To: 20021022134501.C20957@redhat.com
Benjamin LaHaise wrote:
>
> On Tue, Oct 22, 2002 at 10:36:40AM -0700, Martin J. Bligh wrote:
> > Bear in mind that large pages are neither swap backed or file backed
> > (vetoed by Linus), for starters. There are other large app problem scenarios
> > apart from Oracle ;-)
>
> I think the fact that large page support doesn't support mmap for users
> that need it is utterly appauling; there are numerous places where it is
> needed. The requirement for root-only access makes it useless for most
> people, especially in HPC environments where it is most needed as such
> machines are usually shared and accounts are non-priveledged.
>
Have you reviewed the hugetlbfs and hugetlbpage-backed-shm patches?
That code is still requiring CAP_IPC_LOCK, although I suspect it
would be better to allow hugetlbfs mmap to be purely administered
by file permissions.
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next prev parent reply other threads:[~2002-10-22 17:51 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-18 23:06 [PATCH 2.5.43-mm2] New shared page table patch Dave McCracken
2002-10-19 1:32 ` Ed Tomlinson
2002-10-19 1:32 ` Ed Tomlinson
2002-10-19 19:17 ` Bill Davidsen
2002-10-19 19:36 ` Dave McCracken
2002-10-19 19:36 ` Dave McCracken
2002-10-20 4:20 ` Eric W. Biederman
2002-10-20 4:20 ` Eric W. Biederman
2002-10-20 6:18 ` Martin J. Bligh
2002-10-20 6:18 ` Martin J. Bligh
2002-10-21 14:55 ` Eric W. Biederman
2002-10-21 14:55 ` Eric W. Biederman
2002-10-21 15:21 ` Martin J. Bligh
2002-10-21 15:21 ` Martin J. Bligh
2002-10-22 3:54 ` Eric W. Biederman
2002-10-22 3:54 ` Eric W. Biederman
2002-10-22 5:55 ` Martin J. Bligh
2002-10-22 5:55 ` Martin J. Bligh
2002-10-22 16:09 ` Rik van Riel
2002-10-22 16:09 ` Rik van Riel
2002-10-22 16:14 ` Martin J. Bligh
2002-10-22 16:14 ` Martin J. Bligh
2002-10-22 18:06 ` Bill Davidsen
2002-10-22 18:06 ` Bill Davidsen
2002-10-22 19:02 ` Martin J. Bligh
2002-10-22 19:02 ` Martin J. Bligh
2002-10-22 19:21 ` Dave McCracken
2002-10-22 19:21 ` Dave McCracken
2002-10-24 10:50 ` Bill Davidsen
2002-10-24 10:50 ` Bill Davidsen
2002-10-24 14:22 ` Martin J. Bligh
2002-10-24 14:22 ` Martin J. Bligh
2002-10-24 14:38 ` Dave McCracken
2002-10-24 14:38 ` Dave McCracken
2002-10-24 14:51 ` Martin J. Bligh
2002-10-24 14:51 ` Martin J. Bligh
2002-10-25 17:31 ` Bill Davidsen
2002-10-25 17:31 ` Bill Davidsen
2002-10-24 10:42 ` Bill Davidsen
2002-10-24 10:42 ` Bill Davidsen
2002-10-22 17:19 ` Benjamin LaHaise
2002-10-22 17:19 ` Benjamin LaHaise
2002-10-22 17:36 ` Martin J. Bligh
2002-10-22 17:36 ` Martin J. Bligh
2002-10-22 17:45 ` Benjamin LaHaise
2002-10-22 17:45 ` Benjamin LaHaise
2002-10-22 17:56 ` Andrew Morton [this message]
2002-10-22 17:56 ` Andrew Morton
2002-10-22 18:01 ` Benjamin LaHaise
2002-10-22 18:01 ` Benjamin LaHaise
2002-10-22 19:03 ` Martin J. Bligh
2002-10-22 19:03 ` Martin J. Bligh
2002-10-22 20:23 ` Alan Cox
2002-10-22 20:23 ` Alan Cox
2002-10-22 21:33 ` Gerrit Huizenga
2002-10-22 21:33 ` Gerrit Huizenga
2002-10-22 18:22 ` Alan Cox
2002-10-22 18:22 ` Alan Cox
2002-10-22 18:47 ` Gerrit Huizenga
2002-10-22 18:47 ` Gerrit Huizenga
2002-10-22 18:55 ` Benjamin LaHaise
2002-10-22 18:55 ` Benjamin LaHaise
2002-10-22 19:27 ` Gerrit Huizenga
2002-10-22 19:27 ` Gerrit Huizenga
2002-10-22 19:29 ` Benjamin LaHaise
2002-10-22 19:29 ` Benjamin LaHaise
2002-10-22 19:56 ` Arjan van de Ven
2002-10-22 14:26 ` Rik van Riel
2002-10-22 14:26 ` Rik van Riel
2002-10-22 17:09 ` Andrew Morton
2002-10-22 17:09 ` Andrew Morton
2002-10-22 17:15 ` Rik van Riel
2002-10-22 17:15 ` Rik van Riel
2002-10-22 18:36 ` Dave McCracken
2002-10-22 18:36 ` Dave McCracken
2002-10-22 18:49 ` Andrew Morton
2002-10-22 18:49 ` Andrew Morton
2002-10-22 19:06 ` Gerrit Huizenga
2002-10-22 19:06 ` Gerrit Huizenga
2002-10-22 19:29 ` Dave McCracken
2002-10-22 19:29 ` Dave McCracken
2002-10-23 3:03 ` Andi Kleen
2002-10-23 3:10 ` Rik van Riel
2002-10-23 17:49 ` Gerrit Huizenga
[not found] ` <Pine.LNX.4.44L.0210221514430.1648-100000@duckman.distro.conecti va>
2002-10-22 19:11 ` Ulrich Drepper
2002-10-22 19:11 ` Ulrich Drepper
2002-10-22 19:29 ` Gerrit Huizenga
2002-10-22 19:29 ` Gerrit Huizenga
2002-10-22 18:45 ` Gerrit Huizenga
2002-10-22 18:45 ` Gerrit Huizenga
2002-10-22 17:54 ` Bill Davidsen
2002-10-22 17:54 ` Bill Davidsen
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