BTW, this problem occurred with the 3.11 kernel shipping by default in Ubuntu Saucy as well as this 3.13rc7 daily kernel I'm using currently.
On 01/13/2014 10:44 AM, Wang Shilong wrote: > Just double check, what is your kernel version to trigger this problem… > I suppose this should be an older kernel? If yes, can you have a try at the > latest > upstream kernel and see if problem still exist? > > Thanks, > Wang > >> 在 2014-1-13，下午11:20，Jim Salter <j...@jrs-s.net> 写道： >> >>> Er... I can't use incremental send if I can't get one full send to go >>> through first. =) >> sory, i mean one approach is use '-p' option, you can use: >> >> # btrfs sub create subv >> # btrfs sub snapshot -r subv snap >> # btrfs sub snapshot -r sub snap1 >> # btrfs send snap -p snap1 -f 1 >> # btrfs receive -f 1 backup >> # btrfs sub delete snap1 -<-- now you can delete snap1 safely >> >> The above approach is much faster, i think you can try it! >> >> Thanks, >> Wang >>> I'm hoping the problem will go away for long enough to get a full send >>> completed once I reboot the box, but I can't do that until (much) later in >>> the day. >>> >>> On 01/13/2014 10:17 AM, Wang Shilong wrote: >>>> Hello, >>>> >>>> I took a careful think about your problems below, i think this is because >>>> btrfs *ulist* implement use >>>> krealloc which might cause memory allocation fails especial you use full >>>> send. >>>> >>>> Before we kicked off now stupid *ulist* implements, i think you can use >>>> incremental send to solve >>>> this issue. >>>> >>>> Thanks, >>>> Wang >>>> >>>>> Hi list - >>>>> >>>>> Getting sporadic page allocation failures in btrfs send. This happened >>>>> once several weeks ago but was fine after a reboot; yesterday I did not >>>>> reboot, but had the failure back-to-back trying to send two different >>>>> snapshots. These are full sends, not incremental, of a bit over 600G of >>>>> data. Test machine has 32G of RAM, with 21G of it free (not including >>>>> cache): >>>>> >>>>> root@gwa-virt1:/data/images/.snapshots# free -m >>>>> total used free shared buffers cached >>>>> Mem: 32159 31789 369 0 0 21276 >>>>> -/+ buffers/cache: 10513 21646 >>>>> Swap: 0 0 0 >>>>> >>>>> In both cases (all three, really) the btrfs send failed a bit more than >>>>> half of the way through the send (somewhere around the 380GB mark). >>>>> >>>>> Kern log snippets follow: >>>>> >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.627611] btrfs: page allocation >>>>> failure: order:6, mode:0x104050 >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.627622] CPU: 6 PID: 9642 Comm: >>>>> btrfs Not tainted 3.13.0-031300rc7-generic #201401041835 >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.627773] [<ffffffffa0142214>] ? >>>>> btrfs_get_token_64+0x64/0xf0 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.627818] [<ffffffffa01876dd>] ? >>>>> ulist_add_merge+0xcd/0x270 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.627860] [<ffffffffa01876dd>] >>>>> ulist_add_merge+0xcd/0x270 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.627894] [<ffffffffa018615c>] >>>>> find_parent_nodes+0x50c/0x6f0 [btrf ] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.627930] [<ffffffffa018e550>] ? >>>>> compare_refs.isra.23+0x130/0x130 btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.627965] [<ffffffffa0187019>] >>>>> iterate_extent_inodes+0xf9/0x270 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628003] [<ffffffffa014b7a5>] ? >>>>> free_extent_buffer+0x35/0x40 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628037] [<ffffffffa018dc9d>] >>>>> find_extent_clone.isra.26+0x26d/0x340 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628072] [<ffffffffa0191207>] >>>>> process_extent+0xd7/0x180 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628107] [<ffffffffa01918ff>] >>>>> changed_cb+0xdf/0x170 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628141] [<ffffffffa0191ad2>] >>>>> full_send_tree+0x142/0x280 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628174] [<ffffffffa0191ccc>] ? >>>>> send_subvol_begin+0xbc/0x2b0 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628209] [<ffffffffa0191fa0>] >>>>> send_subvol+0xe0/0xf0 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628244] [<ffffffffa01922f1>] >>>>> btrfs_ioctl_send+0x341/0x520 [btrfs] >>>>> Jan 12 14:05:36 gwa-virt1 kernel: [535523.628279] [<ffffffffa01606d3>] >>>>> btrfs_ioctl+0x953/0xac0 [btrfs] >>>>> >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016512] btrfs: page allocation >>>>> failure: order:5, mode:0x104050 >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016518] CPU: 4 PID: 18689 Comm: >>>>> btrfs Not tainted 3.13.0-031300rc7-generic #201401041835 >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016597] [<ffffffffa0142214>] ? >>>>> btrfs_get_token_64+0x64/0xf0 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016617] [<ffffffffa01876dd>] ? >>>>> ulist_add_merge+0xcd/0x270 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016637] [<ffffffffa01876dd>] >>>>> ulist_add_merge+0xcd/0x270 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016653] [<ffffffffa018615c>] >>>>> find_parent_nodes+0x50c/0x6f0 [btrf ] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016669] [<ffffffffa018e550>] ? >>>>> compare_refs.isra.23+0x130/0x130 btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016684] [<ffffffffa0187019>] >>>>> iterate_extent_inodes+0xf9/0x270 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016700] [<ffffffffa014b7a5>] ? >>>>> free_extent_buffer+0x35/0x40 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016716] [<ffffffffa018dc9d>] >>>>> find_extent_clone.isra.26+0x26d/0x340 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016732] [<ffffffffa0191207>] >>>>> process_extent+0xd7/0x180 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016747] [<ffffffffa01918ff>] >>>>> changed_cb+0xdf/0x170 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016763] [<ffffffffa0191ad2>] >>>>> full_send_tree+0x142/0x280 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016778] [<ffffffffa0191ccc>] ? >>>>> send_subvol_begin+0xbc/0x2b0 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016794] [<ffffffffa0191fa0>] >>>>> send_subvol+0xe0/0xf0 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016810] [<ffffffffa01922f1>] >>>>> btrfs_ioctl_send+0x341/0x520 [btrfs] >>>>> Jan 12 21:34:00 gwa-virt1 kernel: [562448.016826] [<ffffffffa01606d3>] >>>>> btrfs_ioctl+0x953/0xac0 [btrfs] >>>>> >>>>> -- >>>>> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in >>>>> the body of a message to majord...@vger.kernel.org >>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in >>>> the body of a message to majord...@vger.kernel.org >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
