2.6.8-rc3-mm2: Debug: sleeping function called from invalid context at mm/mempool.c:197

2.6.8-rc3-mm2: Debug: sleeping function called from invalid context at mm/mempool.c:197

[Janet Morgan]

I see the msg below while running on 2.6.8-rc3-mm2, but not on the plain 
rc3 tree;
ditto for rc1-mm1 vs rc1, which is as far back as I've gone so far.

I'm using QLogic QLA2200 adapters and both ext2/ext3 filesystems.  
The problem is very recreatable for me -- I pretty much just open a 
large file on one
of the qlogic-attached devices.

I tried backing out bk-scsi.patch for the heck of it, but I still see 
the problem.

Aug  9 10:33:43 elm3b81 kernel: Debug: sleeping function called from 
invalid context at mm/mempool.c:197
Aug  9 10:33:43 elm3b81 kernel: in_atomic():1, irqs_disabled():0
Aug  9 10:33:43 elm3b81 kernel:  [<c0105f4e>] dump_stack+0x1e/0x30
Aug  9 10:33:43 elm3b81 kernel:  [<c011d2a9>] __might_sleep+0x99/0xb0
Aug  9 10:33:43 elm3b81 kernel:  [<c013dadb>] mempool_alloc+0x14b/0x150
Aug  9 10:33:43 elm3b81 kernel:  [<f8a6cb8c>] 
qla2x00_get_new_sp+0x1c/0x30 [qla2xxx]
Aug  9 10:33:43 elm3b81 kernel:  [<f8a6868a>] 
qla2x00_queuecommand+0x3a/0x6a0 [qla2xxx]
Aug  9 10:33:43 elm3b81 kernel:  [<c036f941>] scsi_dispatch_cmd+0x141/0x1e0
Aug  9 10:33:43 elm3b81 kernel:  [<c0374c9f>] scsi_request_fn+0x1ef/0x3d0
Aug  9 10:33:43 elm3b81 kernel:  [<c0333b82>] blk_run_queue+0x32/0x50
Aug  9 10:33:43 elm3b81 kernel:  [<c03740f0>] scsi_end_request+0xd0/0xf0
Aug  9 10:33:43 elm3b81 kernel:  [<c0374404>] scsi_io_completion+0x134/0x440
Aug  9 10:33:43 elm3b81 kernel:  [<c0398d9f>] sd_rw_intr+0x5f/0x280
Aug  9 10:33:43 elm3b81 kernel:  [<c036fd63>] scsi_finish_command+0x73/0xb0
Aug  9 10:33:43 elm3b81 kernel:  [<c036fc8b>] scsi_softirq+0xab/0xd0
Aug  9 10:33:43 elm3b81 kernel:  [<c012427c>] __do_softirq+0xbc/0xd0
Aug  9 10:33:43 elm3b81 kernel:  [<c01242c5>] do_softirq+0x35/0x40
Aug  9 10:33:43 elm3b81 kernel:  [<c0107b47>] do_IRQ+0x107/0x130
Aug  9 10:33:43 elm3b81 kernel:  [<c0105a90>] common_interrupt+0x18/0x20

Thanks,
-Janet


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Re: 2.6.8-rc3-mm2: Debug: sleeping function called from invalid context at mm/mempool.c:197

[Janet Morgan]

Andrew Vasquez wrote:

>On Monday, August 09, 2004 6:42 AM, linux-kernel-owner@vger.kernel.org
>wrote: 
>  
>
>>I see the msg below while running on 2.6.8-rc3-mm2, but not
>>on the plain
>>rc3 tree;
>>ditto for rc1-mm1 vs rc1, which is as far back as I've gone so far.
>>
>>    
>>
>
>This allocation should be done with GFP_ATOMIC flags.  The attached 
>patch should apply cleanly to any recent kernel
>
>  
>

and seems to work fine.

Thanks,
-Janet

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RE: 2.6.8-rc3-mm2: Debug: sleeping function called from invalid context at mm/mempool.c:197

[Andrew Vasquez]

[-- Attachment #1: Type: text/plain, Size: 397 bytes --]

On Monday, August 09, 2004 6:42 AM, linux-kernel-owner@vger.kernel.org
wrote: 
> I see the msg below while running on 2.6.8-rc3-mm2, but not
> on the plain
> rc3 tree;
> ditto for rc1-mm1 vs rc1, which is as far back as I've gone so far.
>

This allocation should be done with GFP_ATOMIC flags.  The attached 
patch should apply cleanly to any recent kernel.

Regards,
Andrew Vasquez

[-- Attachment #2: mpool_alloc.diff --]
[-- Type: application/octet-stream, Size: 392 bytes --]

===== drivers/scsi/qla2xxx/qla_os.c 1.39 vs edited =====
--- 1.39/drivers/scsi/qla2xxx/qla_os.c	2004-07-12 09:54:49 -07:00
+++ edited/drivers/scsi/qla2xxx/qla_os.c	2004-08-09 16:48:29 -07:00
@@ -3590,7 +3590,7 @@
 {
 	srb_t *sp;
 
-	sp = mempool_alloc(ha->srb_mempool, GFP_KERNEL);
+	sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
 	if (sp)
 		atomic_set(&sp->ref_count, 1);
 	return (sp);