Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> writes: > On Thu, Feb 17, 2011 at 10:57 AM, Eric W. Biederman > <ebiederm@xxxxxxxxxxxx> 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. ÂPerhaps 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 Eric -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href