On Wed, Jul 22, 2020 at 11:23:20AM +0200, Jürgen Groß wrote: > On 22.07.20 11:02, Roger Pau Monné wrote: > > On Wed, Jul 22, 2020 at 10:59:48AM +0200, Jürgen Groß wrote: > > > On 22.07.20 10:38, Roger Pau Monné wrote: > > > > 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? > > > > > > I don't see how CONFIG_XEN_BALLOON_MEMORY_HOTPLUG would help here, as it > > > will be used for real memory hotplug only. Well, you _can_ use it for > > > mapping of foreign pages, but you'd have to: > > > > > > echo 1 > /proc/sys/xen/balloon/hotplug_unpopulated > > > > Uh, I've completely missed the point then. I assume there's some > > reason for not doing it by default then? (using empty hotplug ranges > > to map foreign memory) > > This dates back to 2015. See commit 1cf6a6c82918c9aad. > > I guess we could initialize xen_hotplug_unpopulated with 1 for PVH > dom0.
Would you like me to enabled it in osstest first and then we can see about enabling it by default? Roger.
