Re: 2.6.13-rc1 problems

[Ismail Donmez <ismail@kde.org.tr>]

On Wednesday 29 June 2005 20:06, you wrote:
> On Wed, 29 Jun 2005, Ismail Donmez wrote:
> > I upgraded to 2.6.13-rc1 and kjournald now takes 100% CPU and I see
> > worrying problems in syslog :
> >
> > Jun 29 19:15:05 localhost kernel: Badness in blk_remove_plug at
> > drivers/block/ll_rw_blk.c:1424
>
> I don't know about kjournald, but for the Badness, you want patch I posted:
>
> get_request is now expected to be holding on to queue_lock, with interrupts
> disabled, when it returns NULL; but one path forgot that, causing all kinds
> of nastiness under swap load - badness backtraces, strange failures, BUGs.
>
> Signed-off-by: Hugh Dickins <hugh@veritas.com>
>
> --- 2.6.13-rc1/drivers/block/ll_rw_blk.c	2005-06-29 11:54:08.000000000
> +0100 +++ linux/drivers/block/ll_rw_blk.c	2005-06-29 14:41:04.000000000
> +0100 @@ -1917,10 +1917,9 @@ get_rq:
>  	 * limit of requests, otherwise we could have thousands of requests
>  	 * allocated with any setting of ->nr_requests
>  	 */
> -	if (rl->count[rw] >= (3 * q->nr_requests / 2)) {
> -		spin_unlock_irq(q->queue_lock);
> +	if (rl->count[rw] >= (3 * q->nr_requests / 2))
>  		goto out;
> -	}
> +
>  	rl->count[rw]++;
>  	rl->starved[rw] = 0;
>  	if (rl->count[rw] >= queue_congestion_on_threshold(q))

Thank you both!. Any idea about this part? :

Jun 29 19:16:32 localhost kernel: Badness in __kfree_skb at 
net/core/skbuff.c:290
Jun 29 19:16:32 localhost kernel:
Jun 29 19:16:32 localhost kernel: Call 
Trace:<ffffffff8027a997>{__kfree_skb+183} 
<ffffffff880024ad>{:unix:unix_dgram_recvmsg+557}
Jun 29 19:16:32 localhost kernel:        <ffffffff80273c4e>{sock_recvmsg+238} 
<ffffffff8015d982>{__alloc_pages+242}
Jun 29 19:16:32 localhost kernel:        
<ffffffff80148770>{autoremove_wake_function+0} 
<ffffffff8018efd5>{poll_freewait+85}
Jun 29 19:16:32 localhost kernel:        <ffffffff8027498a>{sockfd_lookup+26} 
<ffffffff8027526a>{sys_recvfrom+218}
Jun 29 19:16:32 localhost kernel:        <ffffffff8018eff0>{__pollwait+0} 
<ffffffff8018fcdd>{sys_select+893}
Jun 29 19:16:32 localhost kernel:        <ffffffff8010eb6e>{system_call+126}


ismail

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