* might_sleep warnings in gereric_make_request
@ 2006-04-20 3:05 Zhikun Wang
2006-04-20 3:31 ` Matthew Wilcox
0 siblings, 1 reply; 3+ messages in thread
From: Zhikun Wang @ 2006-04-20 3:05 UTC (permalink / raw)
To: Neil Brown, linux-raid, linux-scsi, Eric Moore
Hi:
I want to call genric_make_request in bio->bi_end_io function. But it incurs might_sleep warnings! I wonder this method is safe in the kernel? Thanks a lot!
cfq: depth 4 reached, tagging now on
Debug: sleeping function called from invalid context at drivers/block/ll_rw_blk.c:2878
in_atomic():1, irqs_disabled():0
[<c0279467>] generic_make_request+0x1e/0x23a
[<c011ad1a>] recalc_task_prio+0xc1/0x150
[<c011adff>] activate_task+0x56/0x65
[<e0a35dfb>] raid1_end_sync_read+0x245/0x364 [raid1]
[<c011be66>] __wake_up_common+0x39/0x59
[<e0a35bb6>] raid1_end_sync_read+0x0/0x364 [raid1]
[<c0181f29>] bio_endio+0x3d/0x68
[<c015576c>] mempool_free+0x67/0x1ca
[<c0279a25>] __end_that_request_first+0xc1/0x1f5
[<c0274a70>] elv_queue_empty+0x12/0x1b
[<e0821e45>] scsi_end_request+0x1e/0x210 [scsi_mod]
[<c015576c>] mempool_free+0x67/0x1ca
[<c02e5460>] ip_local_deliver+0x60/0x1a2
[<e082231b>] scsi_io_completion+0x16c/0x4c2 [scsi_mod]
[<c011ad1a>] recalc_task_prio+0xc1/0x150
[<c011ad1a>] recalc_task_prio+0xc1/0x150
[<e0869fe2>] sd_rw_intr+0x137/0x3b1 [sd_mod]
[<e081b3a9>] scsi_finish_command+0x8e/0xc1 [scsi_mod]
[<c0103c0e>] common_interrupt+0x1a/0x20
[<e081b2d0>] scsi_softirq+0x9e/0xc3 [scsi_mod]
[<c0127f1e>] __do_softirq+0x3e/0x8a
[<c0105c29>] do_softirq+0x3e/0x42
=======================
[<c0105b24>] do_IRQ+0x51/0x82
[<c0105b24>] do_IRQ+0x51/0x82
[<c0103c0e>] common_interrupt+0x1a/0x20
[<c010101a>] default_idle+0x0/0x29
[<c0101040>] default_idle+0x26/0x29
[<c01010a6>] cpu_idle+0x34/0x4c
[<c03be71f>] start_kernel+0x154/0x1ab
[<c03be2fe>] unknown_bootoption+0x0/0x1cd
cfq: depth 4 reached, tagging now on
Debug: sleeping function called from invalid context at drivers/block/ll_rw_blk.c:2878
in_atomic():1, irqs_disabled():0
[<c0279467>] generic_make_request+0x1e/0x23a
[<c015576c>] mempool_free+0x67/0x1ca
[<c0276e35>] __generic_unplug_device+0x31/0x33
[<c011be66>] __wake_up_common+0x39/0x59
[<e0a35dfb>] raid1_end_sync_read+0x245/0x364 [raid1]
[<e08f67a3>] raid_done_sync+0x2b/0x4a [raid]
[<c02cbae7>] skb_checksum+0x55/0x2cc
[<e0a35bb6>] raid1_end_sync_read+0x0/0x364 [raid1]
[<c0181f29>] bio_endio+0x3d/0x68
[<c015576c>] mempool_free+0x67/0x1ca
[<c0279a25>] __end_that_request_first+0xc1/0x1f5
[<c0274a70>] elv_queue_empty+0x12/0x1b
[<e0821e45>] scsi_end_request+0x1e/0x210 [scsi_mod]
[<c015576c>] mempool_free+0x67/0x1ca
[<c02e5460>] ip_local_deliver+0x60/0x1a2
[<e082231b>] scsi_io_completion+0x16c/0x4c2 [scsi_mod]
[<e0869fe2>] sd_rw_intr+0x137/0x3b1 [sd_mod]
[<c012c59e>] cascade+0x21/0x3b
[<e081b3a9>] scsi_finish_command+0x8e/0xc1 [scsi_mod]
[<c0103c0e>] common_interrupt+0x1a/0x20
[<e081b2d0>] scsi_softirq+0x9e/0xc3 [scsi_mod]
[<c0127f1e>] __do_softirq+0x3e/0x8a
[<c0105c29>] do_softirq+0x3e/0x42
=======================
[<c0105b24>] do_IRQ+0x51/0x82
[<c0105b24>] do_IRQ+0x51/0x82
[<c0103c0e>] common_interrupt+0x1a/0x20
[<c010101a>] default_idle+0x0/0x29
[<c0101040>] default_idle+0x26/0x29
[<c01010a6>] cpu_idle+0x34/0x4c
[<c03be71f>] start_kernel+0x154/0x1ab
[<c03be2fe>] unknown_bootoption+0x0/0x1cd
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: might_sleep warnings in gereric_make_request
2006-04-20 3:05 might_sleep warnings in gereric_make_request Zhikun Wang
@ 2006-04-20 3:31 ` Matthew Wilcox
[not found] ` <200604201142426250967@gmail.com>
0 siblings, 1 reply; 3+ messages in thread
From: Matthew Wilcox @ 2006-04-20 3:31 UTC (permalink / raw)
To: Zhikun Wang; +Cc: Neil Brown, linux-raid, linux-scsi, Eric Moore
On Thu, Apr 20, 2006 at 11:05:55AM +0800, Zhikun Wang wrote:
> Hi:
> I want to call genric_make_request in bio->bi_end_io function. But it incurs might_sleep warnings! I wonder this method is safe in the kernel? Thanks a lot!
>
>
> cfq: depth 4 reached, tagging now on
> Debug: sleeping function called from invalid context at drivers/block/ll_rw_blk.c:2878
> in_atomic():1, irqs_disabled():0
You can't call generic_make_request() from interrupt context. What are
you trying to do?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Re: might_sleep warnings in gereric_make_request
[not found] ` <200604201142426250967@gmail.com>
@ 2006-04-20 3:47 ` Matthew Wilcox
0 siblings, 0 replies; 3+ messages in thread
From: Matthew Wilcox @ 2006-04-20 3:47 UTC (permalink / raw)
To: Zhikun Wang; +Cc: linux-scsi, linux-raid
On Thu, Apr 20, 2006 at 11:42:45AM +0800, Zhikun Wang wrote:
> I want to write one disk data to another disk. So i call generic_make_request in first bio->bi_end_io!
> Would you please suggest another approach?
> Thanks!
Like raid-1? Maybe drivers/md/raid1.c would give you some useful hints.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2006-04-20 3:47 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-04-20 3:05 might_sleep warnings in gereric_make_request Zhikun Wang
2006-04-20 3:31 ` Matthew Wilcox
[not found] ` <200604201142426250967@gmail.com>
2006-04-20 3:47 ` Matthew Wilcox
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).