Re: [BUG] kmem_cache_grow.

[hugang <gang_hu@soul.com.cn>]

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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