|From:||Andrew Morton <akpm-AT-osdl.org>|
|To:||Christoph Lameter <clameter-AT-sgi.com>|
|Subject:||Re: [PATCH 0/4] Swap migration V3: Overview|
|Date:||Thu, 20 Oct 2005 16:06:38 -0700|
|Cc:||kravetz-AT-us.ibm.com, linux-kernel-AT-vger.kernel.org, linux-mm-AT-kvack.org, clameter-AT-sgi.com, magnus.damm-AT-gmail.com, marcelo.tosatti-AT-cyclades.com|
Christoph Lameter <firstname.lastname@example.org> wrote: > > Page migration is also useful for other purposes: > > 1. Memory hotplug. Migrating processes off a memory node that is going > to be disconnected. > > 2. Remapping of bad pages. These could be detected through soft ECC errors > and other mechanisms. It's only useful for these things if it works with close-to-100% reliability. And there are are all sorts of things which will prevent that - mlock, ongoing direct-io, hugepages, whatever. So before we can commit ourselves to the initial parts of this path we'd need some reassurance that the overall scheme addresses these things and that the end result has a high probability of supporting hot unplug and remapping sufficiently well.
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