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Date: Mon, 09 Dec 2013 18:12:14 +0100 From: Vlastimil Babka <vbabka@...e.cz> To: Sasha Levin <sasha.levin@...cle.com>, Andrew Morton <akpm@...ux-foundation.org> Cc: joern@...fs.org, mgorman@...e.de, Michel Lespinasse <walken@...gle.com>, riel@...hat.com, LKML <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org> Subject: Re: kernel BUG in munlock_vma_pages_range On 12/09/2013 06:05 PM, Sasha Levin wrote: > On 12/09/2013 04:34 AM, Vlastimil Babka wrote: >> Hello, I will look at it, thanks. >> Do you have specific reproduction instructions? > > Not really, the fuzzer hit it once and I've been unable to trigger it again. Looking at > the piece of code involved it might have had something to do with hugetlbfs, so I'll crank > up testing on that part. Thanks. Do you have trinity log and the .config file? I'm currently unable to even boot linux-next with my config/setup due to a GPF. Looking at code I wouldn't expect that it could encounter a tail page, without first encountering a head page and skipping the whole huge page. At least in THP case, as TLB pages should be split when a vma is split. As for hugetlbfs, it should be skipped for mlock/munlock operations completely. One of these assumptions is probably failing here... Vlastimil > > Thanks, > Sasha > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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