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Date: Wed, 18 Aug 2010 13:09:51 +0900 From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp> To: hughd@...gle.com Cc: tim.c.chen@...ux.intel.com, akpm@...ux-foundation.org, torvalds@...ux-foundation.org, viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org Subject: Re: [2.6.36-rc1] List corruption when using initrd. Hugh Dickins wrote: > > "[2.6.36-rc1] Bugs in __free_pipe_info()". > > That's good, but puzzling. I'll mention it in the patch comment, since > that's what you've found: but I've given up trying to understand how. Yeah, it's puzzling. What I was doing is ./newns ./foo | grep -vF OK where "./newns" calls mount("tmpfs") after clone(CLONE_NEWNS) and ./foo calls chroot()/mount("tmpfs")/umount()/pivot_root() etc. After applying your patch, I can no longer reproduce __free_pipe_info() errors. I don't know why __free_pipe_info() errors are reported on "grep" rather than "newns" or "foo". But if the cause of __free_pipe_info() errors was memory corruption by the bug in shmem, it is possible that fixing the bug in shmem solves __free_pipe_info() errors. Thanks. -- 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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