From: David Rientjes <rientjes@google.com>
To: "Jason J. Herne" <jjherne@linux.vnet.ibm.com>
Cc: linux-s390@vger.kernel.org, linux-mm@kvack.org,
akpm@linux-foundation.org, aarcange@redhat.com,
borntraeger@de.ibm.com
Subject: Re: [PATCH] mm: Loosen MADV_NOHUGEPAGE to enable Qemu postcopy on s390
Date: Fri, 13 Nov 2015 14:58:32 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.2.10.1511131458210.6173@chino.kir.corp.google.com> (raw)
In-Reply-To: <1447341516-18076-1-git-send-email-jjherne@linux.vnet.ibm.com>
On Thu, 12 Nov 2015, Jason J. Herne wrote:
> MADV_NOHUGEPAGE processing is too restrictive. kvm already disables
> hugepage but hugepage_madvise() takes the error path when we ask to turn
> on the MADV_NOHUGEPAGE bit and the bit is already on. This causes Qemu's
> new postcopy migration feature to fail on s390 because its first action is
> to madvise the guest address space as NOHUGEPAGE. This patch modifies the
> code so that the operation succeeds without error now.
>
> Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
> Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2015-11-13 22:58 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-12 15:18 Jason J. Herne
2015-11-12 16:45 ` Christian Borntraeger
2015-11-13 22:58 ` David Rientjes [this message]
2015-11-18 13:31 ` Vlastimil Babka
2015-11-19 8:22 ` Christian Borntraeger
2015-11-19 9:31 ` Vlastimil Babka
2015-11-19 9:43 ` Dr. David Alan Gilbert
-- strict thread matches above, loose matches on Subject: below --
2015-11-11 15:35 Jason J. Herne
2015-11-11 17:30 ` Andrea Arcangeli
2015-11-11 19:47 ` Christian Borntraeger
2015-11-11 20:42 ` Andrea Arcangeli
2015-11-11 20:01 ` Christian Borntraeger
2015-11-11 20:37 ` Andrea Arcangeli
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.DEB.2.10.1511131458210.6173@chino.kir.corp.google.com \
--to=rientjes@google.com \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=borntraeger@de.ibm.com \
--cc=jjherne@linux.vnet.ibm.com \
--cc=linux-mm@kvack.org \
--cc=linux-s390@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox