From: Andrea Arcangeli <aarcange@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>, Nick Piggin <npiggin@suse.de>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
lsf10-pc@lists.linuxfoundation.org, linux-scsi@vger.kernel.org
Subject: Re: [Lsf10-pc] Current MM topics for LSF10/MM Summit 8-9 August in Boston
Date: Mon, 21 Jun 2010 16:45:20 +0200 [thread overview]
Message-ID: <20100621144520.GB5787@random.random> (raw)
In-Reply-To: <4C1F77CD.40509@redhat.com>
On Mon, Jun 21, 2010 at 05:31:41PM +0300, Avi Kivity wrote:
> On 06/21/2010 05:29 PM, Andrea Arcangeli wrote:
> > On Mon, Jun 21, 2010 at 05:18:56PM +0300, Gleb Natapov wrote:
> >
> >> Avi did the fix. We discussed using MADV_DONTFORK for that, but calling
> >> madvise() from kernel deemed to be messy.
> >>
> > Agree that calling madvise looks messy. It's possible to set
> > VM_DONTCOPY under mmap_sem write mode and it'll work as well.
> >
>
> But we aren't guaranteed to get our own vma, yes?
Correct, one would need to call split_vma like madvise_behavior does
before setting the flag. For sure current fix is simpler ;).
> Note kvm shouldn't be calling do_mmap() in any case. I let that in
> because it was simple and because we had a userspace interface relying
> on that, but that's no longer the case, so I'll make that page kernel owned.
Agree ;).
--
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:[~2010-06-21 14:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-16 20:50 Current topics for LSF10/MM Summit 8-9 August in Boston James Bottomley
2010-06-17 6:35 ` Nicholas A. Bellinger
2010-06-17 13:27 ` [Lsf10-pc] " James Bottomley
2010-06-17 16:00 ` Christof Schmitt
2010-06-17 16:07 ` James Bottomley
2010-06-17 16:13 ` Boaz Harrosh
2010-06-17 16:34 ` Vladislav Bolkhovitin
2010-06-17 16:42 ` James Bottomley
2010-06-17 17:11 ` Vladislav Bolkhovitin
2010-06-17 17:37 ` James Bottomley
2010-06-17 17:55 ` Vladislav Bolkhovitin
2010-06-18 11:41 ` Christof Schmitt
2010-06-18 12:18 ` [Lsf10-pc] " J. Bruce Fields
2010-06-21 12:05 ` Current MM " Nick Piggin
2010-06-21 13:16 ` [Lsf10-pc] " Andrea Arcangeli
2010-06-21 13:22 ` Gleb Natapov
2010-06-21 14:09 ` Andrea Arcangeli
2010-06-21 14:18 ` Gleb Natapov
2010-06-21 14:29 ` Andrea Arcangeli
2010-06-21 14:31 ` Avi Kivity
2010-06-21 14:45 ` Andrea Arcangeli [this message]
2010-06-22 3:30 ` KOSAKI Motohiro
2010-06-21 20:00 ` David Rientjes
2010-06-21 20:13 ` James Bottomley
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=20100621144520.GB5787@random.random \
--to=aarcange@redhat.com \
--cc=avi@redhat.com \
--cc=gleb@redhat.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-scsi@vger.kernel.org \
--cc=lsf10-pc@lists.linuxfoundation.org \
--cc=npiggin@suse.de \
/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;
as well as URLs for NNTP newsgroup(s).