[BUG] Warning in mm/slab.c:777

[BUG] Warning in mm/slab.c:777

[Rolf Eike Beer]

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After bootup (runlevel 5) I found this in dmesg:

WARNING: at mm/slab.c:777 __find_general_cachep()
 [<c0165fe1>] __kmalloc+0x40/0xc3
 [<f8f4d5ed>] drm_rmdraw+0x126/0x24e [drm]
 [<c023e68b>] skb_dequeue+0x39/0x3f
 [<f8f4d4c7>] drm_rmdraw+0x0/0x24e [drm]
 [<f8f4e10e>] drm_ioctl+0x14c/0x192 [drm]
 [<c0172cb0>] do_ioctl+0x4c/0x62
 [<c0172efd>] vfs_ioctl+0x237/0x249
 [<c017aff3>] mntput_no_expire+0x11/0x68
 [<c0172f5b>] sys_ioctl+0x4c/0x65
 [<c0103cde>] sysenter_past_esp+0x5f/0x85
 =======================

Kernel is Linus' git of yesterday, the first occurence of this in my logs was 
on May 16th.

Greetings,

Eike

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Re: [BUG] Warning in mm/slab.c:777

[Richard Mittendorfer]

Also sprach Rolf Eike Beer <eike-kernel@sf-tec.de> (Sat, 26 May 2007 08:48:55 +0200):
> After bootup (runlevel 5) I found this in dmesg:
> 
> WARNING: at mm/slab.c:777 __find_general_cachep()
>  [<c0165fe1>] __kmalloc+0x40/0xc3
>  [<f8f4d5ed>] drm_rmdraw+0x126/0x24e [drm]
>  [<c023e68b>] skb_dequeue+0x39/0x3f
>  [<f8f4d4c7>] drm_rmdraw+0x0/0x24e [drm]
>  [<f8f4e10e>] drm_ioctl+0x14c/0x192 [drm]
>  [<c0172cb0>] do_ioctl+0x4c/0x62
>  [<c0172efd>] vfs_ioctl+0x237/0x249
>  [<c017aff3>] mntput_no_expire+0x11/0x68
>  [<c0172f5b>] sys_ioctl+0x4c/0x65
>  [<c0103cde>] sysenter_past_esp+0x5f/0x85
>  =======================
> 
> Kernel is Linus' git of yesterday, the first occurence of this in my logs was 
> on May 16th.

It may be the same zero request I hit in slub, and according to 
http://bugzilla.kernel.org/show_bug.cgi?id=8476 people care about. Also
I remember a mail from Linus, where he meant it's handled quite well
(currently no link cause fetching thze whole IMAP quite takes some
time, sry).

> Greetings,
> 
> Eike

sl, ritch

Re: [BUG] Warning in mm/slab.c:777

[Rolf Eike Beer]

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You wrote:
> Also sprach Rolf Eike Beer <eike-kernel@sf-tec.de> (Sat, 26 May 2007 
08:48:55 +0200):
> > After bootup (runlevel 5) I found this in dmesg:
> >
> > WARNING: at mm/slab.c:777 __find_general_cachep()
> >  [<c0165fe1>] __kmalloc+0x40/0xc3
> >  [<f8f4d5ed>] drm_rmdraw+0x126/0x24e [drm]
> >  [<c023e68b>] skb_dequeue+0x39/0x3f
> >  [<f8f4d4c7>] drm_rmdraw+0x0/0x24e [drm]
> >  [<f8f4e10e>] drm_ioctl+0x14c/0x192 [drm]
> >  [<c0172cb0>] do_ioctl+0x4c/0x62
> >  [<c0172efd>] vfs_ioctl+0x237/0x249
> >  [<c017aff3>] mntput_no_expire+0x11/0x68
> >  [<c0172f5b>] sys_ioctl+0x4c/0x65
> >  [<c0103cde>] sysenter_past_esp+0x5f/0x85
> >  =======================
> >
> > Kernel is Linus' git of yesterday, the first occurence of this in my logs
> > was on May 16th.
>
> It may be the same zero request I hit in slub, and according to
> http://bugzilla.kernel.org/show_bug.cgi?id=8476 people care about. Also
> I remember a mail from Linus, where he meant it's handled quite well
> (currently no link cause fetching thze whole IMAP quite takes some
> time, sry).

Thank you for your information. It may be the same alloc, but it's independent 
of SLUB:

CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set

Eike

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