Messages in this thread | | | From | (Eric W. Biederman) | Date | Thu, 17 Feb 2011 11:31:07 -0800 | Subject | Re: BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4 |
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Linus Torvalds <torvalds@linux-foundation.org> writes:
> On Thu, Feb 17, 2011 at 10:57 AM, Eric W. Biederman > <ebiederm@xmission.com> wrote: >> >> fedora 14 >> ext4 on all filesystems > > Your dmesg snippets had ext3 mentioned, though: > > <6>EXT3-fs (sda1): recovery required on readonly filesystem > <6>EXT3-fs (sda1): write access will be enabled during recovery > <6>EXT3-fs: barriers not enabled > .. > <6>EXT3-fs (sda1): recovery complete > <6>EXT3-fs (sda1): mounted filesystem with ordered data mode > <6>dracut: Mounted root filesystem /dev/sda1 > > not that I see that it should matter, but there's been some bigger > ext3 changes too (like the batched discard). > > I don't really think ext3 is the issue, though.
Oh right. I changed the configuration but I haven't upgraded this machine off of ext3 root yet. The partition where all of the data is going is ext4. Creating a chrooted build environment on the fly is great but it can momentarily swamp the disk.
>> I was about to say this happens with DEBUG_PAGEALLOC enabled but it >> appears that options keeps eluding my fingers when I have a few minutes >> to play with it. Perhaps this time will be the charm. > > Please do. You seem to be much better at triggering it than anybody > else. And do the DEBUG_LIST and DEBUG_SLUB_ON things too (even if the > DEBUG_LIST thing won't catch list_move())
DEBUG_LIST I did manage to get enabled and it didn't catch anything, despite some bad PMD's showing up. The other two should be enabled in the kernel version I am building right now.
It does look like this can go quiet for a days at a time. The 17th is the first my logs show of it since the 14th.
messages:Feb 14 17:55:12 bs38 kernel: BUG: Bad page map in process [manager] pte:ffff88028c45f748 pmd:28c45f067 messages:Feb 14 17:55:12 bs38 kernel: BUG: Bad page map in process [manager] pte:ffff88028c45f748 pmd:28c45f067 messages:Feb 17 00:49:53 bs38 kernel: BUG: Bad page map in process Sysdb pte:ffff8802742b3758 pmd:2742b3067 messages:Feb 17 00:49:53 bs38 kernel: BUG: Bad page map in process Sysdb pte:ffff8802742b3758 pmd:2742b3067 messages:Feb 17 10:00:43 bs38 kernel: BUG: Bad page map in process cc1plus pte:ffff880190f73758 pmd:190f73067 messages:Feb 17 10:00:43 bs38 kernel: BUG: Bad page map in process cc1plus pte:ffff88025efed758 pmd:25efed067 messages:Feb 17 10:00:43 bs38 kernel: BUG: Bad page map in process cc1plus pte:ffff88025efed758 pmd:25efed067 messages:Feb 17 10:00:43 bs38 kernel: BUG: Bad page map in process cc1plus pte:ffff880190f73758 pmd:190f73067
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