From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valtteri Kiviniemi Subject: Re: Xen 4 snapshot problem Date: Fri, 11 Jun 2010 03:11:52 +0300 Message-ID: <4C117F48.6090800@dataproof.fi> References: <4C068C33.5030101@dataproof.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4C068C33.5030101@dataproof.fi> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Hi, Bump. Does anyone have any ideas what could be causing this? - Valtteri Kiviniemi Valtteri Kiviniemi kirjoitti: > Hi, > > I am having some problems with Xen 4 (2.6.31.13) and lvm-snapshots. I > have a snapshot-script running once a night. The snapshots are created > succesfully and all the data is accessible. However, some times the > snapshot creation gives errors in dmesg, but it still finishes > succesfully. I had problems previously on Xen 3.4's 2.6.18.8 kernel > where the lvcreate command just stuck. I was instructed to test Xen 4 > and the latest pv_ops kernel to see if it works better. Is there still > some bug related to creating lvm snapshots? > > Server is running latest Xen downloaded from xen.org and manually > compiled. Distro is debian lenny. > > Log: > > attempt to access beyond end of device > dm-0: rw=0, want=209715144, limit=41943040 > Buffer I/O error on device dm-0, logical block 26214392 > EXT4-fs (dm-0): barriers enabled > kjournald2 starting: pid 2572, dev dm-0:8, commit interval 5 seconds > EXT4-fs (dm-0): internal journal on dm-0:8 > EXT4-fs (dm-0): delayed allocation enabled > EXT4-fs: file extents enabled > EXT4-fs: mballoc enabled > EXT4-fs (dm-0): ext4_orphan_cleanup: deleting unreferenced inode 265279 > EXT4-fs (dm-0): 1 orphan inode deleted > EXT4-fs (dm-0): recovery complete > EXT4-fs (dm-0): mounted filesystem with ordered data mode > mount: page allocation failure. order:5, mode:0xc0d0 > Pid: 3178, comm: mount Not tainted 2.6.31.13-dom0 #1 > Call Trace: > [] ? __alloc_pages_nodemask+0x507/0x54e > [] ? __get_free_pages+0x12/0x4f > [] ? ext4_mb_init+0x34c/0x425 > [] ? ext4_fill_super+0x1b4c/0x1fe4 > [] ? snprintf+0x44/0x4c > [] ? __down_write_nested+0x34/0xa9 > [] ? xen_restore_fl_direct_end+0x0/0x1 > [] ? xen_force_evtchn_callback+0x9/0xa > [] ? check_events+0x12/0x20 > [] ? get_sb_bdev+0x111/0x159 > [] ? ext4_fill_super+0x0/0x1fe4 > [] ? vfs_kern_mount+0x4f/0x95 > [] ? do_kern_mount+0x43/0xe1 > [] ? check_events+0x12/0x20 > [] ? do_mount+0x716/0x782 > [] ? sys_mount+0x85/0xcf > [] ? system_call_fastpath+0x16/0x1b > Mem-Info: > DMA per-cpu: > CPU 0: hi: 0, btch: 1 usd: 0 > CPU 1: hi: 0, btch: 1 usd: 0 > CPU 2: hi: 0, btch: 1 usd: 0 > CPU 3: hi: 0, btch: 1 usd: 0 > DMA32 per-cpu: > CPU 0: hi: 186, btch: 31 usd: 0 > CPU 1: hi: 186, btch: 31 usd: 0 > CPU 2: hi: 186, btch: 31 usd: 0 > CPU 3: hi: 186, btch: 31 usd: 0 > Active_anon:12622 active_file:75787 inactive_anon:12687 > inactive_file:51082 unevictable:5 dirty:7507 writeback:17 unstable:0 > free:3836 slab:76527 mapped:1129 pagetables:843 bounce:0 > DMA free:4000kB min:52kB low:64kB high:76kB active_anon:0kB > inactive_anon:84kB a > ctive_file:5440kB inactive_file:2832kB unevictable:0kB present:13756kB > pages_sca > nned:0 all_unreclaimable? no > lowmem_reserve[]: 0 994 994 994 > DMA32 free:11344kB min:4004kB low:5004kB high:6004kB active_anon:50488kB > inactiv e_anon:50664kB > active_file:297708kB inactive_file:201496kB unevictable:20kB pres > ent:1018080kB pages_scanned:0 all_unreclaimable? no > lowmem_reserve[]: 0 0 0 0 > DMA: 254*4kB 1*8kB 2*16kB 0*32kB 8*64kB 5*128kB 5*256kB 1*512kB 0*1024kB > 0*2048k B 0*4096kB = 4000kB > DMA32: 1510*4kB 149*8kB 217*16kB 10*32kB 1*64kB 2*128kB 0*256kB 0*512kB > 0*1024kB 0*2048kB 0*4096kB = 11344kB > 127182 total pagecache pages > 0 pages in swap cache > Swap cache stats: add 0, delete 0, find 0/0 > Free swap = 0kB > Total swap = 0kB > 262144 pages RAM > 23192 pages reserved > 127122 pages shared > 111804 pages non-shared > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel