Re: WARNING: at mm/page-writeback.c:1990__set_page_dirty_nobuffers+0x13a/0x170()

From: Dave Jones
Date: Fri Jun 01 2012 - 10:15:05 EST


On Fri, Jun 01, 2012 at 01:44:44AM -0700, Hugh Dickins wrote:
> So I'm wondering if your trinity fuzzer happens to succeed a lot more
> often on madvise MADV_REMOVEs than fallocate FALLOC_FL_PUNCH_HOLEs, and
> the bug you converged on is not in tmpfs, but in ext4 (or xfs? or ocfs2?),
> which began to support MADV_REMOVE with that commit.

One more thing: I happened to see this during a kernel build last night
on another machine too, so it's not just fuzzing fallout. I'm surprised more
people aren't seeing it.

Dave

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