2008/11/17 Jens Axboe <jens.axboe@xxxxxxxxxx>: > On Mon, Nov 17 2008, Alexander Beregalov wrote: >> 2008/11/15 Alexander Beregalov <a.beregalov@xxxxxxxxx>: >> > 2008/11/15 Jens Axboe <jens.axboe@xxxxxxxxxx>: >> >> On Fri, Nov 14 2008, Alexander Beregalov wrote: >> >>> WARNING: at block/blk-barrier.c:246 blk_do_ordered+0x22b/0x26a() >> >>> Modules linked in: >> >>> Pid: 0, comm: swapper Not tainted 2.6.28-rc4-next-20081114 #3 >> >>> Call Trace: >> >>> <IRQ> [<ffffffff80236d63>] warn_on_slowpath+0x58/0x7d >> >>> [<ffffffff802570e3>] ? mark_lock+0x1c/0x37a >> >>> [<ffffffff803a69f9>] ? elv_rb_del+0x30/0x4b >> >>> [<ffffffff803b1092>] ? cfq_remove_request+0x180/0x1d8 >> >>> [<ffffffff803afd03>] ? __cfq_slice_expired+0xd6/0xeb >> >>> [<ffffffff803afd31>] ? cfq_slice_expired+0x19/0x1b >> >>> [<ffffffff803b1832>] ? cfq_dispatch_requests+0x2c1/0x37e >> >>> [<ffffffff803aa98c>] blk_do_ordered+0x22b/0x26a >> >>> [<ffffffff803a6560>] elv_next_request+0x1d0/0x210 >> >>> [<ffffffff80439c7c>] scsi_request_fn+0x9e/0x539 >> >>> [<ffffffff80255c66>] ? put_lock_stats+0xe/0x27 >> >>> [<ffffffff803a827e>] blk_invoke_request_fn+0x3b/0x6e >> >>> [<ffffffff803a87fd>] __blk_run_queue+0x25/0x29 >> >>> [<ffffffff803a8822>] blk_run_queue+0x21/0x35 >> >>> [<ffffffff80439509>] scsi_run_queue+0x2cf/0x379 >> >>> [<ffffffff8043a33e>] scsi_next_command+0x36/0x46 >> >>> [<ffffffff8043a509>] scsi_end_request+0x92/0xa4 >> >>> [<ffffffff8043aae7>] scsi_io_completion+0x1a7/0x3ad >> >>> [<ffffffff80434551>] scsi_finish_command+0xe9/0xf2 >> >>> [<ffffffff8043afd5>] scsi_softirq_done+0x10e/0x117 >> >>> [<ffffffff803ac393>] blk_done_softirq+0x7f/0x8f >> >>> [<ffffffff8023c173>] __do_softirq+0x70/0x101 >> >>> [<ffffffff8020cc0c>] call_softirq+0x1c/0x28 >> >>> [<ffffffff8020e229>] do_softirq+0x39/0x8a >> >>> [<ffffffff8023bd78>] irq_exit+0x45/0xa2 >> >>> [<ffffffff8020e53a>] do_IRQ+0x16a/0x19c >> >>> [<ffffffff8020bceb>] ret_from_intr+0x0/0xf >> >>> <EOI> [<ffffffff80212e09>] ? mwait_idle+0x3e/0x48 >> >>> [<ffffffff80212e00>] ? mwait_idle+0x35/0x48 >> >>> [<ffffffff8020a940>] ? cpu_idle+0x51/0xba >> >>> [<ffffffff80514f9c>] ? rest_init+0x70/0x72 >> >>> ---[ end trace 115cb4be7e150bb9 ]--- >> >> >> >> I'm assuming this is new with -next and doesn't happen with 2.6.28-rc4? >> > Yes. >> >> Is it reproducible in -next? >> > I have seen it only once yet. >> >> I have the same warning on 2.6.28-rc5-next-20081117, reproducible on dbench. Bisected down to 70bfe2de81b32969db1b4939bf171bbe55bcf1ef "elevator prevent flushing small requests to device" > > How big is the file system, how much ram do you have, what are your > mount options, how many dbench clients, and what dbench version? I tried > reproducing it today with no luck on -git + for-2.6.29. /dev/root on / type xfs (rw,noatime,noquota) /dev/root 145G RAM 2G, Swap 3.9G x86_64 SMP dbench 3.0.4; 25 clients -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
