Re: [PATCH 0/3] make mapped executable pages the first class citizen
From: KOSAKI Motohiro
Date: Tue Jun 23 2009 - 22:43:37 EST
> On Tue, Jun 23, 2009 at 10:43:57PM +0800, David Howells wrote:
> > Wu Fengguang <fengguang.wu@xxxxxxxxx> wrote:
> > > David, could you try running this when it occurred again?
> > >
> > > make Documentation/vm/page-types
> > > Documentation/vm/page-types --raw # run as root
> > Okay. I managed to catch it between the first and second OOMs, and ran the
> > command you asked for.
> Thank you!
> > 0x0000000000000000 142261 555 ________________________________
> > 0x0000000000000400 6797 26 __________B_____________________ buddy
> The buddy+free numbers are pretty high. 26MB PG_buddy pages means much
> more actual free pages. So I bet the 555MB no-flag pages are mostly free pages.
You mean our VM can make OOM although it have 600MB free pages?
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