Re: Kernel bug: mm/rmap.c:483

From: Hugh Dickins (hugh_at_veritas.com)
Date: 01/24/05

  • Next message: Jeff Garzik: "Re: Fwd: Patch to control VGA bus routing and active VGA device." 
    Date:	Mon, 24 Jan 2005 19:41:54 +0000 (GMT)
To: "0602@eq.cz" <0602@eq.cz>

    On Mon, 24 Jan 2005, 0602@eq.cz wrote:
    >
    > I've also experienced mentioned bug, kernel 2.6.10-ac8.
    > The relevant syslog entries and .config are attached.
    > I'm not subscribed, so please CC me.
    >
    > Jan 23 20:01:14 kryton kernel: swap_free: Bad swap offset entry 00100000
    > Jan 23 20:01:14 kryton kernel: swap_free: Bad swap offset entry 00110000
    > Jan 23 20:01:14 kryton kernel: swap_free: Bad swap offset entry 00100000
    > Jan 23 20:01:14 kryton kernel: kernel BUG at mm/rmap.c:483!
    > Jan 23 20:02:24 kryton kernel: kernel BUG at fs/reiserfs/inode.c:357!
    > Jan 23 20:11:29 kryton kernel: kernel BUG at fs/reiserfs/inode.c:357!
    > Jan 23 20:25:53 kryton kernel: kernel BUG at mm/rmap.c:483!
    > Jan 23 20:25:53 kryton kernel: kernel BUG at mm/rmap.c:483!
    > Jan 23 20:29:15 kryton kernel: Bad page state at prep_new_page (in process 'httpd', page c1b29de0)
    > Jan 23 20:29:15 kryton kernel: flags:0x40000110 mapping:00000000 mapcount:-1 count:0

    I'm fairly confident that in your case, unlike Jay's,
    memtest86 will soon show you're suffering from bad memory.

    Those swap_free warnings suggest single-bit and double-bit memory errors;
    which are likely to be responsible for all the rest of your symptoms.

    It's natural that such errors will sometimes appear as swap_free warnings
    and sometimes as rmap.c BUGs. Increasingly it seems that the rmap.c BUG
    is quite a good indicator of bad memory (though not necessarily so). But
    it concerns me that we don't see nearly so many swap_free warnings, which
    should be nearly as common if bad memory were the sole cause.

    Hugh
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

  • Next message: Jeff Garzik: "Re: Fwd: Patch to control VGA bus routing and active VGA device."