Well, that's the problem! I'm assuming the iommu kernel module is leaking memory. But I don't know why and how.
Do you have any idea about it? Or any further information is needed? Robin Murphy <[email protected]> 于 2020年4月24日周五 19:20写道： > On 2020-04-24 1:40 am, Bin wrote: > > Hello? anyone there? > > > > Bin <[email protected]> 于2020年4月23日周四 下午5:14写道： > > > >> Forget to mention, I've already disabled the slab merge, so this is what > >> it is. > >> > >> Bin <[email protected]> 于2020年4月23日周四 下午5:11写道： > >> > >>> Hey, guys: > >>> > >>> I'm running a batch of CoreOS boxes, the lsb_release is: > >>> > >>> ``` > >>> # cat /etc/lsb-release > >>> DISTRIB_ID="Container Linux by CoreOS" > >>> DISTRIB_RELEASE=2303.3.0 > >>> DISTRIB_CODENAME="Rhyolite" > >>> DISTRIB_DESCRIPTION="Container Linux by CoreOS 2303.3.0 (Rhyolite)" > >>> ``` > >>> > >>> ``` > >>> # uname -a > >>> Linux cloud-worker-25 4.19.86-coreos #1 SMP Mon Dec 2 20:13:38 -00 2019 > >>> x86_64 Intel(R) Xeon(R) CPU E5-2640 v2 @ 2.00GHz GenuineIntel GNU/Linux > >>> ``` > >>> Recently, I found my vms constently being killed due to OOM, and after > >>> digging into the problem, I finally realized that the kernel is leaking > >>> memory. > >>> > >>> Here's my slabinfo: > >>> > >>> Active / Total Objects (% used) : 83818306 / 84191607 (99.6%) > >>> Active / Total Slabs (% used) : 1336293 / 1336293 (100.0%) > >>> Active / Total Caches (% used) : 152 / 217 (70.0%) > >>> Active / Total Size (% used) : 5828768.08K / 5996848.72K > (97.2%) > >>> Minimum / Average / Maximum Object : 0.01K / 0.07K / 23.25K > >>> > >>> OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME > >>> > >>> 80253888 80253888 100% 0.06K 1253967 64 5015868K iommu_iova > > Do you really have a peak demand of ~80 million simultaneous DMA > buffers, or is some driver leaking DMA mappings? > > Robin. > > >>> 489472 489123 99% 0.03K 3824 128 15296K kmalloc-32 > >>> > >>> 297444 271112 91% 0.19K 7082 42 56656K dentry > >>> > >>> 254400 252784 99% 0.06K 3975 64 15900K anon_vma_chain > >>> > >>> 222528 39255 17% 0.50K 6954 32 111264K kmalloc-512 > >>> > >>> 202482 201814 99% 0.19K 4821 42 38568K vm_area_struct > >>> > >>> 200192 200192 100% 0.01K 391 512 1564K kmalloc-8 > >>> > >>> 170528 169359 99% 0.25K 5329 32 42632K filp > >>> > >>> 158144 153508 97% 0.06K 2471 64 9884K kmalloc-64 > >>> > >>> 149914 149365 99% 0.09K 3259 46 13036K anon_vma > >>> > >>> 146640 143123 97% 0.10K 3760 39 15040K buffer_head > >>> > >>> 130368 32791 25% 0.09K 3104 42 12416K kmalloc-96 > >>> > >>> 129752 129752 100% 0.07K 2317 56 9268K Acpi-Operand > >>> > >>> 105468 105106 99% 0.04K 1034 102 4136K > >>> selinux_inode_security > >>> 73080 73080 100% 0.13K 2436 30 9744K > kernfs_node_cache > >>> > >>> 72360 70261 97% 0.59K 1340 54 42880K inode_cache > >>> > >>> 71040 71040 100% 0.12K 2220 32 8880K eventpoll_epi > >>> > >>> 68096 59262 87% 0.02K 266 256 1064K kmalloc-16 > >>> > >>> 53652 53652 100% 0.04K 526 102 2104K pde_opener > >>> > >>> 50496 31654 62% 2.00K 3156 16 100992K kmalloc-2048 > >>> > >>> 46242 46242 100% 0.19K 1101 42 8808K cred_jar > >>> > >>> 44496 43013 96% 0.66K 927 48 29664K > proc_inode_cache > >>> > >>> 44352 44352 100% 0.06K 693 64 2772K task_delay_info > >>> > >>> 43516 43471 99% 0.69K 946 46 30272K > sock_inode_cache > >>> > >>> 37856 27626 72% 1.00K 1183 32 37856K kmalloc-1024 > >>> > >>> 36736 36736 100% 0.07K 656 56 2624K eventpoll_pwq > >>> > >>> 34076 31282 91% 0.57K 1217 28 19472K radix_tree_node > >>> > >>> 33660 30528 90% 1.05K 1122 30 35904K > ext4_inode_cache > >>> > >>> 32760 30959 94% 0.19K 780 42 6240K kmalloc-192 > >>> > >>> 32028 32028 100% 0.04K 314 102 1256K > ext4_extent_status > >>> > >>> 30048 30048 100% 0.25K 939 32 7512K > skbuff_head_cache > >>> > >>> 28736 28736 100% 0.06K 449 64 1796K fs_cache > >>> > >>> 24702 24702 100% 0.69K 537 46 17184K files_cache > >>> > >>> 23808 23808 100% 0.66K 496 48 15872K ovl_inode > >>> > >>> 23104 22945 99% 0.12K 722 32 2888K kmalloc-128 > >>> > >>> 22724 21307 93% 0.69K 494 46 15808K > shmem_inode_cache > >>> > >>> 21472 21472 100% 0.12K 671 32 2684K seq_file > >>> > >>> 19904 19904 100% 1.00K 622 32 19904K UNIX > >>> > >>> 17340 17340 100% 1.06K 578 30 18496K mm_struct > >>> > >>> 15980 15980 100% 0.02K 94 170 376K avtab_node > >>> > >>> 14070 14070 100% 1.06K 469 30 15008K signal_cache > >>> > >>> 13248 13248 100% 0.12K 414 32 1656K pid > >>> > >>> 12128 11777 97% 0.25K 379 32 3032K kmalloc-256 > >>> > >>> 11008 11008 100% 0.02K 43 256 172K > >>> selinux_file_security > >>> 10812 10812 100% 0.04K 106 102 424K Acpi-Namespace > >>> > >>> These information shows that the 'iommu_iova' is the top memory > consumer. > >>> In order to optimize the network performence of Openstack virtual > machines, > >>> I enabled the vt-d feature in bios and sriov feature of Intel 82599 10G > >>> NIC. I'm assuming this is the root cause of this issue. > >>> > >>> Is there anything I can do to fix it? > >>> > >> > > > > > > _______________________________________________ > > iommu mailing list > > [email protected] > > https://lists.linuxfoundation.org/mailman/listinfo/iommu > > >
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