[BUG]: Hard lockups continue with linux-2.6.15-rc1-rc7

[BUG]: Hard lockups continue with linux-2.6.15-rc1-rc7

[Tarkan Erimer]

[-- Attachment #1: Type: text/plain, Size: 918 bytes --]

Hi all,

I'm having hard lockups with all the RCs of linux-2.6.15. I,
previously, mentioned this with the subject "[BUG]: Software compiling
occasionlly hangs under 2.6.15-rc1/rc2 and 2.6.15-rc1-mm2" in the
list. I investigated a bit at found these interesting things.

-- Always reproducable. To reproduce:
    - in console 1, issueing "updatedb"
    - in console 2, issueing "find / -name "blahblah" -print
    - in console 3, issueing "emerge -uDp world" (BTW, I'm using Gentoo.)
    - in console 4, X started.
    - a few minutes later, system completely freezes. No Alt+SysRq+t
works. (Normally, it does)

When the system freezes, there is nothing in logs. But hardly, I
captured an  Alt+SysRq+t. A few seconds (15-20 seconds) before hang. I
attached this  Alt+SysRq+t and lsmod output. Hope this helps to solve
this.

PS: These problems never occured in 2.6.14.xx and downwards.

Regards.

[-- Attachment #2: lsmod.out --]
[-- Type: application/octet-stream, Size: 2034 bytes --]

Module                  Size  Used by
arc4                    2176  1 
pcmcia                 37024  4 
yenta_socket           25740  3 
rsrc_nonstatic         11904  1 yenta_socket
pcmcia_core            40480  3 pcmcia,yenta_socket,rsrc_nonstatic
rfcomm                 36372  0 
l2cap                  24448  5 rfcomm
snd_pcm_oss            47776  0 
snd_mixer_oss          17408  1 snd_pcm_oss
snd_seq_dummy           4100  0 
snd_seq_oss            30976  0 
snd_seq_midi_event      7296  1 snd_seq_oss
snd_seq                49168  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device          8972  3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_intel8x0m          16908  1 
snd_intel8x0           31004  5 
snd_ac97_codec         83872  2 snd_intel8x0m,snd_intel8x0
snd_ac97_bus            2688  1 snd_ac97_codec
snd_pcm                83460  6 snd_pcm_oss,snd_intel8x0m,snd_intel8x0,snd_ac97_codec
snd_timer              24068  4 snd_seq,snd_pcm
snd                    53348  18 snd_pcm_oss,snd_mixer_oss,snd_seq_oss,snd_seq,snd_seq_device,snd_intel8x0m,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer
soundcore               9696  1 snd
snd_page_alloc         10888  3 snd_intel8x0m,snd_intel8x0,snd_pcm
nls_utf8                2432  1 
ntfs                  192016  1 
ieee80211_crypt_tkip    10240  0 
ieee80211_crypt_ccmp     6912  0 
ieee80211_crypt_wep     4992  1 
ipw2100               129636  0 
ieee80211              41192  1 ipw2100
ieee80211_crypt         6276  4 ieee80211_crypt_tkip,ieee80211_crypt_ccmp,ieee80211_crypt_wep,ieee80211
firmware_class         10624  2 pcmcia,ipw2100
e100                   37124  0 
mii                     5760  1 e100
bluetooth              45156  4 rfcomm,l2cap
uhci_hcd               31120  0 
ehci_hcd               30984  0 
ohci_hcd               19844  0 
usb_storage            67392  0 
usbcore               119044  5 uhci_hcd,ehci_hcd,ohci_hcd,usb_storage
scsi_mod               93992  1 usb_storage
as_iosched             17796  2 
agpgart                32984  0 


[-- Attachment #3: trace.out.bz2 --]
[-- Type: application/x-bzip2, Size: 4637 bytes --]

Re: [BUG]: Hard lockups continue with linux-2.6.15-rc1-rc7

[Pekka Enberg]

Hi Tarkan,

On 12/26/05, Tarkan Erimer <tarkane@gmail.com> wrote:
> I'm having hard lockups with all the RCs of linux-2.6.15. I,
> previously, mentioned this with the subject "[BUG]: Software compiling
> occasionlly hangs under 2.6.15-rc1/rc2 and 2.6.15-rc1-mm2" in the
> list. I investigated a bit at found these interesting things.
>
> -- Always reproducable. To reproduce:
>     - in console 1, issueing "updatedb"
>     - in console 2, issueing "find / -name "blahblah" -print
>     - in console 3, issueing "emerge -uDp world" (BTW, I'm using Gentoo.)
>     - in console 4, X started.
>     - a few minutes later, system completely freezes. No Alt+SysRq+t
> works. (Normally, it does)
>
> When the system freezes, there is nothing in logs. But hardly, I
> captured an  Alt+SysRq+t. A few seconds (15-20 seconds) before hang. I
> attached this  Alt+SysRq+t and lsmod output. Hope this helps to solve
> this.

You can use git bisect to narrow down the changeset that introduced
the bug. Please refer to the following URL for details:
http://www.kernel.org/pub/software/scm/git/docs/howto/isolate-bugs-with-bisect.txt

                        Pekka

Fwd: [BUG]: Hard lockups continue with linux-2.6.15-rc1-rc7

[Tarkan Erimer]

Hi Pekka,

Thanks for the reply. I will try out that and let know the results.

Regards,


On 12/26/05, Pekka Enberg <penberg@cs.helsinki.fi> wrote:
> Hi Tarkan,
>
> On 12/26/05, Tarkan Erimer <tarkane@gmail.com> wrote:
> > I'm having hard lockups with all the RCs of linux-2.6.15. I,
> > previously, mentioned this with the subject "[BUG]: Software compiling
> > occasionlly hangs under 2.6.15-rc1/rc2 and 2.6.15-rc1-mm2" in the
> > list. I investigated a bit at found these interesting things.
> >
> > -- Always reproducable. To reproduce:
> >     - in console 1, issueing "updatedb"
> >     - in console 2, issueing "find / -name "blahblah" -print
> >     - in console 3, issueing "emerge -uDp world" (BTW, I'm using Gentoo.)
> >     - in console 4, X started.
> >     - a few minutes later, system completely freezes. No Alt+SysRq+t
> > works. (Normally, it does)
> >
> > When the system freezes, there is nothing in logs. But hardly, I
> > captured an  Alt+SysRq+t. A few seconds (15-20 seconds) before hang. I
> > attached this  Alt+SysRq+t and lsmod output. Hope this helps to solve
> > this.
>
> You can use git bisect to narrow down the changeset that introduced
> the bug. Please refer to the following URL for details:
> http://www.kernel.org/pub/software/scm/git/docs/howto/isolate-bugs-with-bisect.txt
>
>                         Pekka
>