|| ||Andrew Morton <akpm-AT-osdl.org>|
|| ||Christoph Lameter <clameter-AT-sgi.com>|
|| ||Re: [PATCH 0/4] Swap migration V3: Overview|
|| ||Thu, 20 Oct 2005 16:06:38 -0700|
|| ||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,
Christoph Lameter <email@example.com> 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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