Re: [BUG] kmem_cache_grow.

From: hugang (gang_hu@soul.com.cn)
Date: Mon Apr 15 2002 - 03:00:18 EST


Thank your. Your are right, I use devfs.
When I disable the devfs, I insert and eject pcmcia card , The linux is fine .

On Mon, 15 Apr 2002 00:38:05 -0700
Andrew Morton <akpm@zip.com.au> wrote:

> hugang wrote:
> >
> > Hell all:
> >
> > Problem: first run "find /" , eject and insert pcmcia network's card, the kernel will crash.
> >
> > Kernel oops: at
> > linux/mm/slab.c->kmem_cache_grow.
> > if (in_interrupt() && (flags & SLAB_LEVEL_MASK) != SLAB_ATOMIC)
> > BUG(); <-- here.
>
> Known problem, I'm afraid. The PCMCIA Card Services layer
> in a number of places is doing stuff from inside a timer
> handler which it should not be.
>
> > Can I remove this check ?
>
> It's best not to, really. It'll probably appear to have
> worked but your kernel could still fail in mysterious ways,
> much later, very occasionally.
>
> If you're using devfs, you could try disabling that. Not
> that this is a devfs bug, but disabling devfs reduces
> the number of functions which the buggy drivers call at
> timer-interrupt time.
>
> The bottom line is that we have a pcmcia_cs staffing shortage.
> Somebody needs to go in, pull out the timers, use schedule_task().
>
> -
>

-- 
thanks with regards!
hugang.

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