From: "Zhikun Wang" <raidwang@gmail.com>
To: Neil Brown <neilb@suse.de>,
linux-raid <linux-raid@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>,
Eric Moore <Eric.Moore@lsil.com>
Subject: might_sleep warnings in gereric_make_request
Date: Thu, 20 Apr 2006 11:05:55 +0800 [thread overview]
Message-ID: <200604201105448287687@gmail.com> (raw)
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
next reply other threads:[~2006-04-20 3:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-20 3:05 Zhikun Wang [this message]
2006-04-20 3:31 ` might_sleep warnings in gereric_make_request Matthew Wilcox
[not found] ` <200604201142426250967@gmail.com>
2006-04-20 3:47 ` Matthew Wilcox
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