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Re: [xen-unstable test] 152067: regressions - trouble: fail/pass/starved

To: osstest service owner <osstest-admin@xxxxxxxxxxxxxx>, <jgross@xxxxxxxx>, <boris.ostrovsky@xxxxxxxxxx>

From: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Date: Wed, 22 Jul 2020 10:38:05 +0200

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List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On Wed, Jul 22, 2020 at 12:37:46AM +0000, osstest service owner wrote: > flight 152067 xen-unstable real [real] > http://logs.test-lab.xenproject.org/osstest/logs/152067/ > > Regressions :-( > > Tests which did not succeed and are blocking, > including tests which could not be run: > test-amd64-amd64-dom0pvh-xl-intel 18 guest-localmigrate/x10 fail REGR. vs. > 152045 Failure was caused by: Jul 21 16:20:58.985209 [ 530.412043] libxl-save-help: page allocation failure: order:4, mode:0x60c0c0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null) Jul 21 16:21:00.378548 [ 530.412261] libxl-save-help cpuset=/ mems_allowed=0 Jul 21 16:21:00.378622 [ 530.412318] CPU: 1 PID: 15485 Comm: libxl-save-help Not tainted 4.19.80+ #1 Jul 21 16:21:00.390740 [ 530.412377] Hardware name: Dell Inc. PowerEdge R420/0K29HN, BIOS 2.4.2 01/29/2015 Jul 21 16:21:00.390810 [ 530.412448] Call Trace: Jul 21 16:21:00.402721 [ 530.412499] dump_stack+0x72/0x8c Jul 21 16:21:00.402801 [ 530.412541] warn_alloc.cold.140+0x68/0xe8 Jul 21 16:21:00.402841 [ 530.412585] __alloc_pages_slowpath+0xc73/0xcb0 Jul 21 16:21:00.414737 [ 530.412640] ? __do_page_fault+0x249/0x4d0 Jul 21 16:21:00.414786 [ 530.412681] __alloc_pages_nodemask+0x235/0x250 Jul 21 16:21:00.426555 [ 530.412734] kmalloc_order+0x13/0x60 Jul 21 16:21:00.426619 [ 530.412774] kmalloc_order_trace+0x18/0xa0 Jul 21 16:21:00.426671 [ 530.412816] alloc_empty_pages.isra.15+0x24/0x60 Jul 21 16:21:00.438447 [ 530.412867] privcmd_ioctl_mmap_batch.isra.18+0x303/0x320 Jul 21 16:21:00.438507 [ 530.412918] ? vmacache_find+0xb0/0xb0 Jul 21 16:21:00.450475 [ 530.412957] privcmd_ioctl+0x253/0xa9b Jul 21 16:21:00.450540 [ 530.412996] ? mmap_region+0x226/0x630 Jul 21 16:21:00.450592 [ 530.413043] ? selinux_mmap_file+0xb0/0xb0 Jul 21 16:21:00.462757 [ 530.413084] ? selinux_file_ioctl+0x15c/0x200 Jul 21 16:21:00.462823 [ 530.413136] do_vfs_ioctl+0x9f/0x630 Jul 21 16:21:00.474698 [ 530.413177] ksys_ioctl+0x5b/0x90 Jul 21 16:21:00.474762 [ 530.413224] __x64_sys_ioctl+0x11/0x20 Jul 21 16:21:00.474813 [ 530.413264] do_syscall_64+0x57/0x130 Jul 21 16:21:00.486480 [ 530.413305] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Jul 21 16:21:00.486548 [ 530.413357] RIP: 0033:0x7f4f7ecde427 Jul 21 16:21:00.486600 [ 530.413395] Code: 00 00 90 48 8b 05 69 aa 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 39 aa 0c 00 f7 d8 64 89 01 48 Jul 21 16:21:00.510766 [ 530.413556] RSP: 002b:00007ffc1ef6eb38 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 Jul 21 16:21:00.522758 [ 530.413629] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4f7ecde427 Jul 21 16:21:00.534632 [ 530.413699] RDX: 00007ffc1ef6eb90 RSI: 0000000000205004 RDI: 0000000000000007 Jul 21 16:21:00.534702 [ 530.413810] RBP: 00007ffc1ef6ebe0 R08: 0000000000000007 R09: 0000000000000000 Jul 21 16:21:00.547013 [ 530.413881] R10: 0000000000000001 R11: 0000000000000213 R12: 000055d754136200 Jul 21 16:21:00.558751 [ 530.413951] R13: 00007ffc1ef6f340 R14: 0000000000000000 R15: 0000000000000000 Jul 21 16:21:00.558846 [ 530.414079] Mem-Info: Jul 21 16:21:00.558928 [ 530.414123] active_anon:1724 inactive_anon:3931 isolated_anon:0 Jul 21 16:21:00.570481 [ 530.414123] active_file:7862 inactive_file:86530 isolated_file:0 Jul 21 16:21:00.582599 [ 530.414123] unevictable:0 dirty:18 writeback:0 unstable:0 Jul 21 16:21:00.582668 [ 530.414123] slab_reclaimable:4704 slab_unreclaimable:4036 Jul 21 16:21:00.594782 [ 530.414123] mapped:3461 shmem:124 pagetables:372 bounce:0 Jul 21 16:21:00.594849 [ 530.414123] free:1863 free_pcp:16 free_cma:0 Jul 21 16:21:00.606733 [ 530.414579] Node 0 active_anon:6896kB inactive_anon:15724kB active_file:31448kB inactive_file:346120kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:13844kB dirty:72kB writeback:0kB shmem:496kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Jul 21 16:21:00.630626 [ 530.414870] DMA free:1816kB min:92kB low:112kB high:132kB active_anon:0kB inactive_anon:0kB active_file:76kB inactive_file:9988kB unevictable:0kB writepending:0kB present:15980kB managed:14328kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB Jul 21 16:21:00.658448 [ 530.415329] lowmem_reserve[]: 0 431 431 431 Jul 21 16:21:00.658513 [ 530.415404] DMA32 free:5512kB min:2608kB low:3260kB high:3912kB active_anon:6896kB inactive_anon:15724kB active_file:31372kB inactive_file:336132kB unevictable:0kB writepending:72kB present:508300kB managed:451760kB mlocked:0kB kernel_stack:2848kB pagetables:1488kB bounce:0kB free_pcp:184kB local_pcp:0kB free_cma:0kB Jul 21 16:21:00.694702 [ 530.415742] lowmem_reserve[]: 0 0 0 0 Jul 21 16:21:00.694778 [ 530.415806] DMA: 8*4kB (UM) 3*8kB (UM) 4*16kB (UM) 3*32kB (M) 5*64kB (UM) 2*128kB (UM) 4*256kB (UM) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1816kB Jul 21 16:21:00.706798 [ 530.416015] DMA32: 4*4kB (UH) 459*8kB (MH) 2*16kB (H) 6*32kB (H) 5*64kB (H) 4*128kB (H) 3*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 5512kB Jul 21 16:21:00.718789 [ 530.416287] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Jul 21 16:21:00.730785 [ 530.416413] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB Jul 21 16:21:00.742847 [ 530.416538] 94608 total pagecache pages Jul 21 16:21:00.742881 [ 530.416598] 79 pages in swap cache Jul 21 16:21:00.754859 [ 530.416670] Swap cache stats: add 702, delete 623, find 948/1025 Jul 21 16:21:00.754924 [ 530.416759] Free swap = 1947124kB Jul 21 16:21:00.766880 [ 530.416822] Total swap = 1949692kB Jul 21 16:21:00.766960 [ 530.416924] 131070 pages RAM Jul 21 16:21:00.767021 [ 530.416988] 0 pages HighMem/MovableOnly Jul 21 16:21:00.778697 [ 530.417051] 14548 pages reserved AFAICT from the kernel config used for the test [0] CONFIG_XEN_BALLOON_MEMORY_HOTPLUG is enabled, so I'm not sure where the memory exhaustion is coming from. Maybe 512M is too low for a PVH dom0, even when using hotplug balloon memory? Roger. [0] http://logs.test-lab.xenproject.org/osstest/logs/152067/build-amd64-pvops/godello0--kconfig

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