Package: kernel-image-2.6.8-1-686 Version: 2.6.8-3 My gateway/fileserver machine running Debian Unstable was unresponsive this morning. When I plugged in a monitor and keyboard, I saw: possible deadlock in kmem_alloc (mode 0x50) on the screen. I was unable to get the machine to reboot, so I hit the reset button. After a reboot, I looked at /var/log/syslog and found thousands of messages (see below). I'm not a kernel hacker by any means, so I'm submitting this in hopes that someone else can make sense of it and forward it upstream, if appropriate. Just briefly, the machine is a Pentium III 1.0 Ghz, ASUS TUSI-M motherboard, 384MB SDRAM. I have XFS on /dev/md0 mounted at /raid is a RAID1 array over two parallel ATA drives (/dev/hde and /dev/hdg); Debian is installed on an EXT3 partition on /dev/hda, also a parallel ATA drive. Here is the first message in syslog. I have the entire relevant portion of syslog saved (size is ~690k), as well as the machine's dmesg, if necessary. Please let me know if I can help in any other way. kernel: kswapd0: page allocation failure. order:4, mode:0x50 kernel: [__alloc_pages+760/880] __alloc_pages+0x2f8/0x370 kernel: [__get_free_pages+37/64] __get_free_pages+0x25/0x40 kernel: [kmem_getpages+34/192] kmem_getpages+0x22/0xc0 kernel: [cache_grow+186/384] cache_grow+0xba/0x180 kernel: [cache_alloc_refill+362/544] cache_alloc_refill+0x16a/0x220 kernel: [__kmalloc+116/128] __kmalloc+0x74/0x80 kernel: [__crc_dq_data_lock+456637/3868974] kmem_alloc+0x59/0xc0 [xfs] kernel: [__crc_dq_data_lock+456927/3868974] kmem_realloc+0x2b/0x80 [xfs] kernel: [__crc_dq_data_lock+315547/3868974] xfs_iext_realloc+0xf7/0x150 [xfs] kernel: [__crc_dq_data_lock+136029/3868974] xfs_bmap_insert_exlist +0x39/0x90 [xfs] kernel: [__crc_dq_data_lock+111221/3868974] xfs_bmap_add_extent_delay_real+0x7b1/0x16b0 [xfs] kernel: [__crc_dq_data_lock+470791/3868974] _pagebuf_ioapply +0x243/0x2f0 [xfs] kernel: [scheduler_tick+364/1104] scheduler_tick+0x16c/0x450 kernel: [__crc_dq_data_lock+108936/3868974] xfs_bmap_add_extent +0x3a4/0x4e0 [xfs] kernel: [__crc_dq_data_lock+144882/3868974] xfs_bmapi+0x73e/0x1610 [xfs] kernel: [__crc_dq_data_lock+468880/3868974] pagebuf_rele+0x2c/0x120 [xfs] kernel: [__crc_dq_data_lock+174467/3868974] xfs_bmbt_get_state +0x2f/0x40 [xfs] kernel: [__crc_dq_data_lock+137200/3868974] xfs_bmap_do_search_extents +0xbc/0x3f0 [xfs] kernel: [__crc_dq_data_lock+341475/3868974] xfs_log_reserve+0xbf/0xd0 [xfs] kernel: [__crc_dq_data_lock+330222/3868974] xfs_iomap_write_allocate +0x2aa/0x4d0 [xfs] kernel: [__crc_dq_data_lock+326131/3868974] xfs_iomap+0x3ff/0x560 [xfs] kernel: [__crc_dq_data_lock+457788/3868974] xfs_map_blocks+0x58/0xa0 [xfs] kernel: [__crc_dq_data_lock+462167/3868974] xfs_page_state_convert +0x513/0x680 [xfs] kernel: [free_buffer_head+57/112] free_buffer_head+0x39/0x70 kernel: [__crc_dq_data_lock+464592/3868974] linvfs_release_page +0xbc/0xe0 [xfs] kernel: [try_to_release_page+81/128] try_to_release_page+0x51/0x80 kernel: [shrink_list+998/1248] shrink_list+0x3e6/0x4e0 kernel: [shrink_cache+335/832] shrink_cache+0x14f/0x340 kernel: [shrink_slab+120/416] shrink_slab+0x78/0x1a0 kernel: [shrink_zone+170/224] shrink_zone+0xaa/0xe0 kernel: [balance_pgdat+469/576] balance_pgdat+0x1d5/0x240 kernel: [kswapd+210/240] kswapd+0xd2/0xf0 kernel: [autoremove_wake_function+0/96] autoremove_wake_function +0x0/0x60 kernel: [ret_from_fork+6/20] ret_from_fork+0x6/0x14 kernel: [autoremove_wake_function+0/96] autoremove_wake_function +0x0/0x60 kernel: [kswapd+0/240] kswapd+0x0/0xf0 kernel: [kernel_thread_helper+5/24] kernel_thread_helper+0x5/0x18 -- jon@tgpsolutions.com Administrator, tgpsolutions http://www.tgpsolutions.com
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