Re: Kernel bug: mm/rmap.c:483
From: Jay Roplekar
Date: Sun Jan 23 2005 - 11:56:46 EST
I am not sure this is a fixed problem in 2.6.11-rc2 based on my read of the
changelog, hence this email. Here is the summary:
1. I started with vanilla 2.6.10 where I replaced ieee1394 drivers from trunk
rev 1251 patched in. My kernel is tainted due to ndiswrapper that loads
windows drivers for my wireless PCI card. One out of 4 times I actually
booted 2.6.10 and manually brought up wlan0 I got 'reboot needed etc
messages' . Please note that using similar approach in 2.6.8 does not cause
this issue. Following is the error in /var/log/messages ( I did not paste
everything to be brief):
Jan 22 08:26:58 localhost kernel: Bad page state at prep_new_page (in process
'net_applet', page c1323a00)
Jan 22 08:26:58 localhost kernel: flags:0x20000004 mapping:00000000 mapcount:1
count:1
Jan 22 08:26:58 localhost kernel: Backtrace:
Jan 22 08:26:58 localhost kernel: [dump_stack+30/32] dump_stack+0x1e/0x20
Jan 22 08:26:58 localhost kernel: [<c0103cde>] dump_stack+0x1e/0x20
Jan 22 08:26:58 localhost kernel: [bad_page+117/176] bad_page+0x75/0xb0
Jan 22 08:26:58 localhost kernel: [<c013c1b5>] bad_page+0x75/0xb0
Jan 22 08:26:58 localhost kernel: [prep_new_page+40/112]
prep_new_page+0x28/0x70
Jan 22 08:26:58 localhost kernel: [<c013c4d8>] prep_new_page+0x28/0x70
#####
Jan 22 08:26:58 localhost kernel: ------------[ cut here ]------------
Jan 22 08:26:58 localhost kernel: kernel BUG at mm/rmap.c:483!
Jan 22 08:26:58 localhost kernel: invalid operand: 0000 [#1]
Jan 22 08:26:58 localhost kernel: Modules linked in: mga md5 ipv6 snd_pcm_oss
snd_mixer_oss snd_via82xx snd_ac97_codec snd_pcm snd_timer snd_page_alloc
gameport snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore af_packet
fealnx mii eth1394 ide_cd cdrom ohci1394 ieee1394 loop ntfs nls_iso8859_1
nls_cp437 vfat fat ndiswrapper via_agp agpgart uhci_hcd usbcore genrtc ext3
jbd
Jan 22 08:26:58 localhost kernel: CPU: 0
Jan 22 08:26:58 localhost kernel: EIP: 0060:[page_remove_rmap+53/64]
Tainted: P B VLI
Jan 22 08:26:58 localhost kernel: EIP: 0060:[<c014bec5>] Tainted: P B
VLI
Jan 22 08:26:58 localhost kernel: EFLAGS: 00010286 (2.6.10jry)
Jan 22 08:26:58 localhost kernel: EIP is at page_remove_rmap+0x35/0x40
Jan 22 08:26:58 localhost kernel: eax: ffffffff ebx: 00389000 ecx:
c0399d54 edx: c1323a00
Jan 22 08:26:58 localhost kernel: esi: d3b06f44 edi: 003b8000 ebp:
d39ebd2c esp: d39ebd2c
Jan 22 08:26:58 localhost kernel: ds: 007b es: 007b ss: 0068
Jan 22 08:26:58 localhost kernel: Process net_applet (pid: 9326,
threadinfo=d39ea000 task=d6a8d060)
Jan 22 08:26:58 localhost kernel: Stack: d39ebd58 c0145a67 c1323a00 c0139256
dffccabc d5a1af08 191d0045 c1323a00
Jan 22 08:26:58 localhost kernel: 08848000 d3b5b088 08800000 d39ebd88
c0145c10 c0399d54 d3b5b084 08448000
2. I patched in Hugh's patch to 2.6.10 and recompiled. At reboot I ran
memtest86 v 1.26, 3 times without any error. Then rebooting in 2.6.10 and
doing ifup wlan0 gave me system freeze and unfortunately nothing in the log.
Since then I have not seen the same error again after 3 reboots and 2-3 cold
boots followed by ifup. I also tried cycles of ifdown and ifup without any
errors.
3. I am not sure if I should post my whole config here hence I just pasting
DRM related entries here in reference to your original email to Jose`. I
have VIA motherboard and a matrox agp card, [FWIW most of the config is same
as for 2.6.8 kernel that did not show the rmap sympton]
CONFIG_AGP_VIA=m
CONFIG_DRM=y
CONFIG_DRM_MGA=m
I will be glad to provide any other info needed. You may bcc to my email if
this is better discussed off the list. [Although I will anxiously check
lkml.org everyday or use RSS feed]. I am not subsribed as We are not
worthy :-)
Thanks,
Jay
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