linux-kernel - Re: WARNING: at mm/page-writeback.c:1990 __set_page_dirty

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Message-ID: <20120601141459.GC1732@redhat.com>
Date:	Fri, 1 Jun 2012 10:14:59 -0400
From:	Dave Jones <davej@...hat.com>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Cong Wang <amwang@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: WARNING: at mm/page-writeback.c:1990
 __set_page_dirty_nobuffers+0x13a/0x170()

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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