Re: [PATCH] regression: vmalloc easily fail.

Glauber Costa
2008-10-29T22:06:20Z

On Wed, Oct 29, 2008 at 11:43:33AM +0100, Nick Piggin wrote:
> On Wed, Oct 29, 2008 at 12:29:40PM +0200, Avi Kivity wrote:
> > Nick Piggin wrote:
> > >Hmm, spanning <30MB of memory... how much vmalloc space do you have?
> > >
> > >
> >
> > From the original report:
> >
> > >VmallocTotal: 122880 kB
> > >VmallocUsed: 15184 kB
> > >VmallocChunk: 83764 kB
> >
> > So it seems there's quite a bit of free space.
> >
> > Chunk is the largest free contiguous region, right? If so, it seems the
>
> Yes.
>
>
> > problem is unrelated to guard pages, instead the search isn't finding a
> > 1-page area (with two guard pages) for some reason, even though lots of
> > free space is available.
>
> Hmm. The free area search could be buggy...
Do you want me to grab any specific info of it? Or should I just hack myself
randomly into it? I'll probably have some time for that tomorrow.