On Mon, 7 Nov 2005 10:52:57 -0800, Andrew Morton <akpm@xxxxxxxx> wrote: > Reuben Farrelly <reuben-lkml@xxxxxxxx> wrote: > > > > Debug: sleeping function called from invalid context at include/asm/semaphore.h:99 > > in_atomic():1, irqs_disabled():1 > > [<c0103c46>] dump_stack+0x17/0x19 > > [<c011a173>] __might_sleep+0x9c/0xae > > [<c028f82b>] scsi_disk_get_from_dev+0x15/0x48 > > [<c029006e>] sd_prepare_flush+0x17/0x5a > > [<c027f8ff>] scsi_prepare_flush_fn+0x30/0x33 > > [<c0259da0>] blk_start_pre_flush+0xd5/0x13f > > [<c025936b>] elv_next_request+0x113/0x170 > > [<c027fd45>] scsi_request_fn+0x4b/0x2fd > > [<c025b393>] blk_run_queue+0x2b/0x3c > > [<c027f0b3>] scsi_run_queue+0xa4/0xb6 > > [<c027f11f>] scsi_next_command+0x16/0x19 > > [<c027f1db>] scsi_end_request+0x93/0xc5 > > [<c027f494>] scsi_io_completion+0x141/0x46b > > [<c02901e9>] sd_rw_intr+0x117/0x22b > > [<c027ae5f>] scsi_finish_command+0x7f/0x93 > > [<c027ad43>] scsi_softirq+0xa8/0x11a > > [<c0121eb8>] __do_softirq+0x88/0x141 > > [<c0104fd9>] do_softirq+0x77/0x81 > > ======================= > > [<c012205a>] irq_exit+0x48/0x4a > > [<c0104e84>] do_IRQ+0x74/0xa7 > > [<c010374e>] common_interrupt+0x1a/0x20 > > [<f8918c04>] acpi_processor_idle+0x11f/0x2c7 [processor] > > [<c0100d71>] cpu_idle+0x49/0xa0 > > [<c01002d7>] rest_init+0x37/0x39 > > [<c03fd8c5>] start_kernel+0x166/0x179 > > [<c0100210>] 0xc0100210 > > ah-hah, that's a different trace. > > sd_issue_flush() has been altered to run scsi_disk_get_from_dev(), which > takes a semaphore. It does this from within spinlock and, as we see here, > from within softirq. > fwiw, I get this on a RADI5 SATA setup: Nov 7 15:57:35 nada kernel: scheduling while atomic: swapper/0x00000200/0 Nov 7 15:57:35 nada kernel: [schedule+1599/2032] schedule+0x63f/0x7f0 Nov 7 15:57:35 nada kernel: [<b037e00f>] schedule+0x63f/0x7f0 Nov 7 15:57:35 nada kernel: [ata_qc_issue+83/144] ata_qc_issue+0x53/0x90 Nov 7 15:57:35 nada kernel: [<b02d9ce3>] ata_qc_issue+0x53/0x90 Nov 7 15:57:35 nada kernel: [ata_scsi_translate+93/272] ata_scsi_translate+0x5d/0x110 Nov 7 15:57:35 nada kernel: [<b02dc9bd>] ata_scsi_translate+0x5d/0x110 Nov 7 15:57:35 nada kernel: [scsi_done+0/32] scsi_done+0x0/0x20 Nov 7 15:57:35 nada kernel: [<b02c3250>] scsi_done+0x0/0x20 Nov 7 15:57:35 nada kernel: [__down+235/304] __down+0xeb/0x130 Nov 7 15:57:35 nada kernel: [<b037f52b>] __down+0xeb/0x130 Nov 7 15:57:35 nada kernel: [default_wake_function+0/16] default_wake_function+0x0/0x10 Nov 7 15:57:35 nada kernel: [<b0118350>] default_wake_function+0x0/0x10 Nov 7 15:57:35 nada kernel: [__sched_text_start+7/12] __down_failed+0x7/0xc Nov 7 15:57:35 nada kernel: [<b037d96f>] __down_failed+0x7/0xc Nov 7 15:57:35 nada kernel: [sd_prepare_flush+0/112] sd_prepare_flush+0x0/0x70 Nov 7 15:57:35 nada kernel: [<b02df230>] sd_prepare_flush+0x0/0x70 Nov 7 15:57:35 nada kernel: [.text.lock.sd+43/129] .text.lock.sd+0x2b/0x81 Nov 7 15:57:35 nada kernel: [<b02e06ca>] .text.lock.sd+0x2b/0x81 Nov 7 15:57:35 nada kernel: [sd_prepare_flush+30/112] sd_prepare_flush+0x1e/0x70 Nov 7 15:57:35 nada kernel: [<b02df24e>] sd_prepare_flush+0x1e/0x70 Nov 7 15:57:35 nada kernel: [scsi_prepare_flush_fn+44/48] scsi_prepare_flush_fn+0x2c/0x30 Nov 7 15:57:35 nada kernel: [<b02c85dc>] scsi_prepare_flush_fn+0x2c/0x30 Nov 7 15:57:35 nada kernel: [blk_start_post_flush+183/272] blk_start_post_flush+0xb7/0x110 Nov 7 15:57:35 nada kernel: [<b02965e7>] blk_start_post_flush+0xb7/0x110 Nov 7 15:57:35 nada kernel: [__blk_complete_barrier_rq+108/160] __blk_complete_barrier_rq+0x6c/0xa0 Nov 7 15:57:35 nada kernel: [<b02966ac>] __blk_complete_barrier_rq+0x6c/0xa0 Nov 7 15:57:35 nada kernel: [blk_complete_barrier_rq+15/32] blk_complete_barrier_rq+0xf/0x20 Nov 7 15:57:35 nada kernel: [<b02966ef>] blk_complete_barrier_rq+0xf/0x20 Nov 7 15:57:35 nada kernel: [scsi_io_completion+77/1168] scsi_io_completion+0x4d/0x490 Nov 7 15:57:35 nada kernel: [<b02c803d>] scsi_io_completion+0x4d/0x490 Nov 7 15:57:35 nada kernel: [sd_rw_intr+85/608] sd_rw_intr+0x55/0x260 Nov 7 15:57:35 nada kernel: [<b02df325>] sd_rw_intr+0x55/0x260 Nov 7 15:57:35 nada kernel: [__wake_up+56/80] __wake_up+0x38/0x50 Nov 7 15:57:35 nada kernel: [<b0118408>] __wake_up+0x38/0x50 Nov 7 15:57:35 nada kernel: [scsi_finish_command+121/160] scsi_finish_command+0x79/0xa0 Nov 7 15:57:35 nada kernel: [<b02c34c9>] scsi_finish_command+0x79/0xa0 Nov 7 15:57:35 nada kernel: [scsi_softirq+183/304] scsi_softirq+0xb7/0x130 Nov 7 15:57:35 nada kernel: [<b02c3397>] scsi_softirq+0xb7/0x130 Nov 7 15:57:35 nada kernel: [__rcu_process_callbacks+86/208] __rcu_process_callbacks+0x56/0xd0 Nov 7 15:57:35 nada kernel: [<b012e5f6>] __rcu_process_callbacks+0x56/0xd0 Nov 7 15:57:35 nada kernel: [__do_softirq+114/224] __do_softirq+0x72/0xe0 Nov 7 15:57:35 nada kernel: [<b01220e2>] __do_softirq+0x72/0xe0 Nov 7 15:57:35 nada kernel: [do_softirq+91/96] do_softirq+0x5b/0x60 Nov 7 15:57:35 nada kernel: [<b01051fb>] do_softirq+0x5b/0x60 Nov 7 15:57:35 nada kernel: ======================= Nov 7 15:57:35 nada kernel: [do_IRQ+73/112] do_IRQ+0x49/0x70 Nov 7 15:57:35 nada kernel: [<b01050c9>] do_IRQ+0x49/0x70 Nov 7 15:57:35 nada kernel: [common_interrupt+26/32] common_interrupt+0x1a/0x20 Nov 7 15:57:35 nada kernel: [<b0103892>] common_interrupt+0x1a/0x20 Nov 7 15:57:35 nada kernel: [default_idle+0/96] default_idle+0x0/0x60 Nov 7 15:57:35 nada kernel: [<b0100d30>] default_idle+0x0/0x60 Nov 7 15:57:35 nada kernel: [default_idle+44/96] default_idle+0x2c/0x60 Nov 7 15:57:35 nada kernel: [<b0100d5c>] default_idle+0x2c/0x60 Nov 7 15:57:35 nada kernel: [cpu_idle+94/128] cpu_idle+0x5e/0x80 Nov 7 15:57:35 nada kernel: [<b0100e0e>] cpu_idle+0x5e/0x80 -- J.A. Magallon <jamagallon()able!es> \ Software is like sex: werewolf!able!es \ It's better when it's free Mandriva Linux release 2006.1 (Cooker) for i586 Linux 2.6.14-jam1 (gcc 4.0.2 (4.0.2-1mdk for Mandriva Linux release 2006.1))
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