From: Christoph Lameter <christoph@lameter.com>
To: Ray Bryant <raybry@engr.sgi.com>
Cc: Ray Bryant <raybry@sgi.com>,
Hirokazu Takahashi <taka@valinux.co.jp>, Andi Kleen <ak@suse.de>,
Dave Hansen <haveblue@us.ibm.com>,
Marcelo Tosatti <marcelo.tosatti@cyclades.com>,
Christoph Hellwig <hch@infradead.org>,
Ray Bryant <raybry@austin.rr.com>, linux-mm <linux-mm@kvack.org>,
lhms-devel@lists.sourceforge.net, Paul Jackson <pj@sgi.com>,
Nathan Scott <nathans@sgi.com>
Subject: Re: [PATCH 2.6.12-rc5 0/10] mm: manual page migration-rc3 -- overview
Date: Thu, 23 Jun 2005 16:03:14 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.62.0506231602350.25004@graphe.net> (raw)
In-Reply-To: <42BB3EFC.7060800@engr.sgi.com>
On Thu, 23 Jun 2005, Ray Bryant wrote:
> > There is PF_FREEZE flag used by the suspend feature that could be used here
> > to send the process into the "freezer" first. Using regular signals to stop
> > a process may cause races with user space code also doing
> > SIGSTOP SIGCONT on a process while migrating it.
>
> So are you suggesting that I set PF_FREEZE, wait until PF_FROZEN is set as
> well, then migrate the pages, and then clear PF_FROZEN to resume the task?
Yes.
> I guess that might work, unless we're actually running on a laptop and it
> goes into hibernation at the same time we are trying to do a migration....
You can atomically set the PF_FREEZE flag.
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next prev parent reply other threads:[~2005-06-23 23:03 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-22 16:39 Ray Bryant
2005-06-22 16:39 ` [PATCH 2.6.12-rc5 1/10] mm: hirokazu-steal_page_from_lru.patch Ray Bryant
2005-06-22 16:39 ` [PATCH 2.6.12-rc5 2/10] mm: manual page migration-rc3 -- xfs-migrate-page-rc3.patch Ray Bryant
2005-06-22 17:30 ` [Lhms-devel] " Joel Schopp
2005-06-23 4:01 ` Nathan Scott
2005-06-22 16:39 ` [PATCH 2.6.12-rc5 3/10] mm: manual page migration-rc3 -- add-node_map-arg-to-try_to_migrate_pages-rc3.patch Ray Bryant
2005-06-22 16:39 ` [PATCH 2.6.12-rc5 4/10] mm: manual page migration-rc3 -- add-sys_migrate_pages-rc3.patch Ray Bryant
2005-06-22 17:23 ` Dave Hansen
2005-06-23 1:34 ` Ray Bryant
2005-06-23 1:42 ` Dave Hansen
2005-06-25 10:32 ` Hirokazu Takahashi
2005-06-22 16:39 ` [PATCH 2.6.12-rc5 5/10] mm: manual page migration-rc3 -- sys_migrate_pages-mempolicy-migration-rc3.patch Ray Bryant
2005-06-23 1:51 ` Andi Kleen
2005-06-23 20:59 ` [Lhms-devel] " Ray Bryant
2005-06-23 21:05 ` Andi Kleen
2005-06-25 5:11 ` Ray Bryant
2005-06-22 16:39 ` [PATCH 2.6.12-rc5 6/10] mm: manual page migration-rc3 -- add-mempolicy-control-rc3.patch Ray Bryant
2005-06-22 16:39 ` [PATCH 2.6.12-rc5 7/10] mm: manual page migration-rc3 -- sys_migrate_pages-migration-selection-rc3.patch Ray Bryant
2005-06-22 16:40 ` [PATCH 2.6.12-rc5 8/10] mm: manual page migration-rc3 -- sys_migrate_pages-cpuset-support-rc3.patch Ray Bryant
2005-06-22 16:40 ` [PATCH 2.6.12-rc5 9/10] mm: manual page migration-rc3 -- sys_migrate_pages-permissions-check-rc3.patch Ray Bryant
2005-06-22 16:40 ` [PATCH 2.6.12-rc5 10/10] mm: manual page migration-rc3 -- N1.2-add-nodemap-to-try_to_migrate_pages-call.patch Ray Bryant
2005-06-23 21:31 ` [PATCH 2.6.12-rc5 0/10] mm: manual page migration-rc3 -- overview Christoph Lameter
2005-06-23 23:00 ` Ray Bryant
2005-06-23 23:03 ` Christoph Lameter [this message]
2005-06-24 14:15 ` [Lhms-devel] " Ray Bryant
2005-06-24 15:41 ` Christoph Lameter
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