Hi, I've been suffering from s2disk hangs again. This time, the hangs were always before the hibernation image was written out. They're still frustratingly random. I just started trying to work out whether doubling PAGES_FOR_IO makes them go away, but they went away on their own again. I did manage to capture a backtrace with debug info though. Here it is for 2.6.33-rc2. (It has also happened on rc1). I was able to get the line numbers (using gdb, e.g. "info line *stop_machine_create+0x27"), having built the kernel with debug info. [top of trace lost due to screen height] ? sync_page (filemap.c:183) ? wait_on_page_bit (filemap.c:506) ? wake_bit_function (wait.c:174) ? shrink_page_list (vmscan.c:696) ? __delayacct_blkio_end (delayacct.c:94) ? finish_wait (list.h:142) ? congestion_wait (backing-dev.c:761) ? shrink_inactive_list (vmscan.c:1193) ? scsi_request_fn (spinlock.h:306) ? blk_run_queue (blk-core.c:434) ? shrink_zone (vmscan.c:1484) ? do_try_to_free_pages (vmscan.c:1684) ? try_to_free_pages (vmscan.c:1848) ? isolate_pages_global (vmscan.c:980) ? __alloc_pages_nodemask (page_alloc.c:1702) ? __get_free_pages (page_alloc.c:1990) ? copy_process (fork.c:237) ? do_fork (fork.c:1443) ? rb_erase ? __switch_to ? kthread ? kernel_thread ? kthread ? kernel_thread_helper ? kthreadd ? kthreadd ? kernel_thread_helper INFO: task s2disk:2174 blocked for more than 120 seconds ... Call Trace: ? __switch_to ? schedule_timeout ? check_preempt_wakeup ? wait_for_common ? default_wake_function ? kthread_create:133 ? worker_thread ? schedule ? create_workqueue_thread ? worker_thread ? __create_workqueue_key (workqueue.c:1006) ? stop_machine_create (stop_machine.c:121) ? disable_nonboot_cpus (cpu.c:370) ? hibernation_snapshot ? snapshot_ioctl ... ? sys_ioctl Thanks for everything Alan -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
