On Mon, Apr 23, 2018 at 03:19:22PM +0200, Andrea del Monaco wrote:
> Hi all,
>
> Since a couple of days, my storage server keeps reporting the
> following messages:
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
>
> I am not quite sure about where's the issue from, as there's still
> some free memory left.
> The only way to make it disappear (temporary) would be by using:
> echo 2 > /proc/sys/vm/drop_caches
>
This tends to occur with the older in-core extent list mechanism as it
relied on higher order allocations such as these for inodes with large
extent counts. Over time, memory fragmentation makes these data
structures difficult to impossible to allocate. This has been addressed
upstream as of v4.15 by using a new data structure for extent lists that
doesn't rely on high order allocations.
If you aren't getting any stack traces with the associated error output,
you can try to confirm by turning up the error level in XFS ('echo 5 >
/proc/sys/fs/xfs/error_level') and report the resulting stack the next
time the problem occurs. It also might be useful to check out the extent
counts of the inode(s) that are being accessed (i.e., 'xfs_io -c fiemap
<path>').
Brian
> Please find below the details about the machine:
> [root@storage02 ~]# cat /etc/redhat-release
> CentOS Linux release 7.3.1611 (Core)
> [root@storage02 ~]# uname -r
> 3.10.0-514.26.2.el7.x86_64
> [root@storage02 ~]# lsblk
> NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
> sda 8:0 0 893.8G 0 disk
> sdb 8:16 0 58.2T 0 disk
> sdc 8:32 0 58.2T 0 disk
> sdd 8:48 0 893.8G 0 disk /beegfs/j4-meta1
> sde 8:64 0 58.2T 0 disk /beegfs/j4-stor1
> sdf 8:80 0 58.2T 0 disk /beegfs/j4-stor2
> sdg 8:96 0 893.8G 0 disk /beegfs/j2-meta1
> sdh 8:112 0 58.2T 0 disk /beegfs/j2-stor1
> sdi 8:128 0 58.2T 0 disk /beegfs/j2-stor2
> sdj 8:144 0 893.8G 0 disk
> sdk 8:160 0 58.2T 0 disk
> sdl 8:176 0 58.2T 0 disk
> sdm 8:192 0 110.8G 0 disk
> ├─sdm1 8:193 0 256M 0 part /boot
> ├─sdm2 8:194 0 11.1G 0 part [SWAP]
> └─sdm3 8:195 0 99.5G 0 part
> └─system-root 253:0 0 99.5G 0 lvm /
>
> [root@storage02 ~]# uname -r
> 3.10.0-514.26.2.el7.x86_64
> [root@storage02 ~]# rpm -qa | grep kernel
> kernel-devel-3.10.0-514.26.2.el7.x86_64
> kernel-tools-libs-3.10.0-514.26.2.el7.x86_64
> kernel-3.10.0-514.26.2.el7.x86_64
> kernel-3.10.0-327.36.3.el7.x86_64
> kernel-tools-3.10.0-514.26.2.el7.x86_64
> kmod-ifs-kernel-updates-3.10.0_514.26.2.el7.x86_64-535.x86_64
> ifs-kernel-updates-devel-3.10.0_514.26.2.el7.x86_64-535.x86_64
> kernel-devel-3.10.0-327.36.3.el7.x86_64
> kernel-headers-3.10.0-514.26.2.el7.x86_64
> [root@storage02 ~]# rpm -qa | grep xfs
> xfsprogs-4.5.0-10.el7_3.x86_64
>
> [root@storage02 ~]# cat /proc/sys/vm/dirty_background_ratio
> 1
> [root@storage02 ~]# cat /proc/sys/vm/dirty_ratio
> 75
> [root@storage02 ~]# cat /proc/sys/vm/vfs_cache_pressure
> 50
>
> rc.local:
> #BeeGFS tuning - storage targets
> for i in sdb sdc sde sdf sdh sdi sdk sdl; do
> echo deadline > /sys/block/$i/queue/scheduler
> echo 4096 > /sys/block/$i/queue/nr_requests
> echo 4096 > /sys/block/$i/queue/read_ahead_kb
> done
>
> #BeeGFS tuning - meta targets
> for i in sda sdd sdg sdj; do
> echo deadline > /sys/block/$i/queue/scheduler
> echo 128 > /sys/block/$i/queue/nr_requests
> done
>
> echo always > /sys/kernel/mm/transparent_hugepage/enabled
> echo always > /sys/kernel/mm/transparent_hugepage/defrag
>
>
> The error
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:1(21677) possible memory allocation deadlock size
> 33568 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33056 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33072 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33072 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:2(4526) possible memory allocation deadlock size
> 33584 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33072 in kmem_alloc (mode:0x250)
> XFS: kworker/u16:0(27932) possible memory allocation deadlock size
> 33072 in kmem_alloc (mode:0x250)
>
> Fix:
> echo 2 > /proc/sys/vm/drop_caches
>
>
> Info about the FSs using XFS:
> [root@storage02 ~]# xfs_info /dev/sde
> meta-data=/dev/sde isize=512 agcount=59, agsize=268435328 blks
> = sectsz=512 attr=2, projid32bit=1
> = crc=0 finobt=0 spinodes=0
> data = bsize=4096 blocks=15625879552, imaxpct=1
> = sunit=128 swidth=2048 blks
> naming =version 2 bsize=4096 ascii-ci=0 ftype=0
> log =internal bsize=4096 blocks=521728, version=2
> = sectsz=512 sunit=64 blks, lazy-count=1
> realtime =none extsz=4096 blocks=0, rtextents=0
> [root@storage02 ~]# xfs_info /dev/sdf
> meta-data=/dev/sdf isize=512 agcount=59, agsize=268435328 blks
> = sectsz=512 attr=2, projid32bit=1
> = crc=0 finobt=0 spinodes=0
> data = bsize=4096 blocks=15625879552, imaxpct=1
> = sunit=128 swidth=2048 blks
> naming =version 2 bsize=4096 ascii-ci=0 ftype=0
> log =internal bsize=4096 blocks=521728, version=2
> = sectsz=512 sunit=64 blks, lazy-count=1
> realtime =none extsz=4096 blocks=0, rtextents=0
> [root@storage02 ~]# xfs_info /dev/sdi
> meta-data=/dev/sdi isize=512 agcount=59, agsize=268435392 blks
> = sectsz=512 attr=2, projid32bit=1
> = crc=0 finobt=0 spinodes=0
> data = bsize=4096 blocks=15625879552, imaxpct=1
> = sunit=64 swidth=1024 blks
> naming =version 2 bsize=4096 ascii-ci=0 ftype=0
> log =internal bsize=4096 blocks=521728, version=2
> = sectsz=512 sunit=64 blks, lazy-count=1
> realtime =none extsz=4096 blocks=0, rtextents=0
> [root@storage02 ~]# xfs_info /dev/sdh
> meta-data=/dev/sdh isize=512 agcount=59, agsize=268435392 blks
> = sectsz=512 attr=2, projid32bit=1
> = crc=0 finobt=0 spinodes=0
> data = bsize=4096 blocks=15625879552, imaxpct=1
> = sunit=64 swidth=1024 blks
> naming =version 2 bsize=4096 ascii-ci=0 ftype=0
> log =internal bsize=4096 blocks=521728, version=2
> = sectsz=512 sunit=64 blks, lazy-count=1
> realtime =none extsz=4096 blocks=0, rtextents=0
>
> [root@storage02 ~]# mount | grep beegfs
> /dev/sdd on /beegfs/j4-meta1 type ext4
> (rw,noatime,nodiratime,nobarrier,data=ordered)
> /dev/sdg on /beegfs/j2-meta1 type ext4
> (rw,noatime,nodiratime,nobarrier,data=ordered)
> /dev/sde on /beegfs/j4-stor1 type xfs
> (rw,noatime,nodiratime,swalloc,attr2,largeio,nobarrier,inode64,logbufs=8,logbsize=256k,sunit=1024,swidth=16384,usrquota,gqnoenforce)
> /dev/sdf on /beegfs/j4-stor2 type xfs
> (rw,noatime,nodiratime,swalloc,attr2,largeio,nobarrier,inode64,logbufs=8,logbsize=256k,sunit=1024,swidth=16384,usrquota,gqnoenforce)
> /dev/sdi on /beegfs/j2-stor2 type xfs
> (rw,noatime,nodiratime,swalloc,attr2,largeio,nobarrier,inode64,logbufs=8,logbsize=256k,sunit=512,swidth=8192,usrquota,gqnoenforce)
> /dev/sdh on /beegfs/j2-stor1 type xfs
> (rw,noatime,nodiratime,swalloc,attr2,largeio,nobarrier,inode64,logbufs=8,logbsize=256k,sunit=512,swidth=8192,usrquota,gqnoenforce)
>
>
> While the issue was present, i've tried to gather some data:
> [root@storage02 ~]# dmesg
> [18038038.420617] XFS: kworker/u16:4(14255) possible memory allocation
> deadlock size 33712 in kmem_alloc (mode:0x250)
> [18038039.884236] XFS: kworker/u16:4(14255) possible memory allocation
> deadlock size 33712 in kmem_alloc (mode:0x250)
> [18038041.894279] XFS: kworker/u16:4(14255) possible memory allocation
> deadlock size 33712 in kmem_alloc (mode:0x250)
> [root@storage02 ~]# free -mh
> total used free shared buff/cache available
> Mem: 62G 4.3G 979M 19M 57G 56G
> Swap: 11G 211M 10G
>
> [root@storage02 ~]# cat /proc/buddyinfo
> Node 0, zone DMA 1 0 0 1 1 0 0
> 0 0 1 2
> Node 0, zone DMA32 2311 4049 12054 1094 3 0 0
> 0 0 0 0
> Node 0, zone Normal 100457 23750 5087 1342 1 0 0
> 0 0 0 0
>
> [root@storage02 ~]# ps aux | grep " D "
> root 14255 0.2 0.0 0 0 ? D 10:22 0:01 [kworker/u16:4]
> root 15729 0.0 0.0 0 0 ? D 10:28 0:00 [kworker/2:42]
> root 15732 0.0 0.0 0 0 ? D 10:28 0:00 [kworker/2:43]
> root 15734 0.0 0.0 0 0 ? D 10:28 0:00 [kworker/2:44]
> root 15735 0.0 0.0 0 0 ? D 10:28 0:00 [kworker/2:45]
> root 16508 0.0 0.0 112648 968 pts/1 S+ 10:31 0:00 grep
> --color=auto D
>
> [root@storage02 ~]# vmstat
> procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
> r b swpd free buff cache si so bi bo in cs us sy id wa st
> 58 1 216804 1000156 5714032 54494696 0 0 1228 3505 0 0
> 2 4 93 1 0
> [root@storage02 ~]# vmstat
> procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
> r b swpd free buff cache si so bi bo in cs us sy id wa st
> 1 1 216804 986720 5714132 54506996 0 0 1228 3505 0 0
> 2 4 93 1 0
> [root@storage02 ~]# vmstat
> procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
> r b swpd free buff cache si so bi bo in cs us sy id wa st
> 63 1 216804 1016120 5714176 54478188 0 0 1228 3505 0 0
> 2 4 93 1 0
> [root@storage02 ~]# vmstat
> procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
> r b swpd free buff cache si so bi bo in cs us sy id wa st
> 1 1 216804 1012572 5714196 54482276 0 0 1228 3505 0 0
> 2 4 93 1 0
>
> [root@storage02 ~]# vmstat 1
> procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
> r b swpd free buff cache si so bi bo in cs us sy id wa st
> 1 0 216804 884428 5714688 54606884 0 0 1228 3505 0 0
> 2 4 93 1 0
> 0 0 216804 869488 5714744 54621520 0 0 4 2248 90864
> 280824 7 16 76 0 0
> 0 0 216804 854532 5714828 54636236 0 0 4 7188 68939
> 215948 6 13 81 1 0
> 0 0 216804 839072 5714900 54651260 0 0 12 66796 121773
> 390372 10 23 67 0 0
> 0 0 216804 824832 5714948 54665660 0 0 0 0 65629
> 182502 4 11 85 0 0
> 1 0 216804 806356 5715004 54679580 0 0 8 10296 108415
> 337787 9 20 71 0 0
> 0 0 216804 792212 5715088 54694268 0 0 0 2340 129698
> 400597 10 24 67 0 0
> 0 0 216804 777452 5715144 54708688 0 0 0 3252 92331
> 282641 8 16 76 0 0
> 39 0 216804 763512 5715700 54722608 0 0 540 5408 84641
> 265557 7 15 78 0 0
> 0 0 216804 749560 5715748 54737136 0 0 0 0 117451
> 385523 10 23 67 0 0
> 0 0 216804 734860 5715792 54751596 0 0 0 0 125409
> 391832 9 24 67 0 0
> 0 0 216804 720656 5715852 54766136 0 0 0 2476 78634
> 234247 6 14 80 0 0
> 0 0 216804 706948 5715920 54779868 0 0 24 10756 85675
> 270733 7 16 77 0 0
> 0 0 216804 693056 5715956 54793888 0 0 4 6844 122175
> 389915 10 23 67 0 0
> 41 0 216804 678724 5716012 54808844 0 0 0 0 100977
> 312065 8 18 74 0 0
> 0 0 216804 664360 5716088 54822964 0 0 0 0 79725
> 250138 6 14 79 0 0
> 0 0 216804 649820 5716144 54837296 0 0 0 2288 114461
> 378085 11 22 68 0 0
> 42 0 216804 635924 5716204 54851240 0 0 0 10652 97495
> 298287 7 18 75 0 0
> 0 0 216804 621596 5716240 54865476 0 0 8 12432 86449
> 261807 7 15 78 0 0
>
> [Mon Apr 23 10:41:11 2018] XFS: kworker/u16:4(14255) possible memory
> allocation deadlock size 33200 in kmem_alloc (mode:0x250)
> [Mon Apr 23 10:41:13 2018] XFS: kworker/u16:4(14255) possible memory
> allocation deadlock size 33200 in kmem_alloc (mode:0x250)
> [root@storage02 ~]# date
> Mon Apr 23 10:35:17 UTC 2018
> [root@storage02 ~]# vmstat
> procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
> r b swpd free buff cache si so bi bo in cs us sy id wa st
> 1 1 216804 1010596 5727768 54464024 0 0 1228 3505 0 0
> 2 4 93 1 0
> [root@storage02 ~]# vmstat 1
> procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
> r b swpd free buff cache si so bi bo in cs us sy id wa st
> 1 1 216804 990480 5727912 54483820 0 0 1228 3505 0 0
> 2 4 93 1 0
> 1 1 216804 1018588 5727944 54456272 0 0 0 4 65812
> 181488 5 10 75 11 0
> 0 1 216804 1010200 5728004 54464252 0 0 0 2276 95495
> 323022 8 20 63 9 0
> 0 1 216804 1002040 5728076 54472092 0 0 0 20 126184
> 395655 10 23 59 8 0
> 0 1 216804 993956 5728164 54480232 0 0 0 7500 83897
> 236594 6 13 71 10 0
> 0 1 216804 985940 5728212 54488112 0 0 0 0 81325
> 268329 7 16 67 10 0
> 0 1 216804 1001508 5728248 54472076 0 0 0 8 125449
> 395975 10 23 59 8 0
> 1 1 216804 993664 5728324 54479908 0 0 0 2344 113745
> 346333 9 20 62 9 0
> 0 1 216804 985376 5728384 54488012 0 0 0 0 56207
> 172372 5 10 75 11 0
> 0 1 216804 1014060 5728456 54460392 0 0 0 3216 121451
> 388402 10 22 59 9 0
> 1 1 216804 1005640 5728508 54468004 0 0 24 23228 97042
> 281593 7 17 67 9 0
> 0 1 216804 996884 5728560 54476676 0 0 0 0 70147
> 222651 6 13 71 10 0
> 20 1 216804 988500 5728632 54484516 0 0 36 5872 129464
> 406727 10 24 58 8 0
> 36 1 216804 1016252 5728688 54457816 0 0 4 276 112221
> 350346 9 21 62 9 0
> 0 1 216804 1008208 5728752 54465104 0 0 0 3076 75175
> 222589 5 12 72 10 0
> 1 0 216804 1000872 5728804 54473236 0 0 16 203248 120988
> 376914 10 22 60 8 0
> 3 1 216804 1672876 5728852 53799244 0 0 4 4 135322
> 404492 10 25 57 8 0
> 0 1 216804 8276484 5728892 47196952 0 0 28 2320 15461
> 20558 1 11 76 12 0
> 0 1 216804 8278968 5728912 47197548 0 0 0 0 3449 4218
> 0 0 87 13 0
> 0 1 216804 8278316 5728940 47198152 0 0 0 7220 4725 4765
> 0 0 87 13 0
> 0 1 216804 8277780 5728960 47198788 0 0 0 4112 4895 5154
> 0 0 87 12 0
> 0 1 216804 8276972 5728972 47199444 0 0 0 4560 4198 5250
> 0 1 87 12 0
> 0 1 216804 8277036 5729000 47199360 0 0 96 6868 4027 4939
> 0 0 87 12 0
> 0 1 216804 8276372 5729016 47199876 0 0 0 4 3148 3896
> 0 0 87 12 0
> 1 1 216804 8276004 5729028 47200336 0 0 0 0 3020 3803
> 0 0 87 12 0
> 0 1 216804 8276344 5729036 47199936 0 0 52 7916 2695 3601
> 0 0 87 12 0
> 0 1 216804 8276200 5729040 47200076 0 0 0 0 1381 1782
> 0 0 87 12 0
> 0 1 216804 8276084 5729064 47200136 0 0 0 1136 6262 6581
> 0 0 87 12 0
> 0 1 216804 8276076 5729068 47200140 0 0 0 0 999 1366
> 0 0 87 13 0
> 0 1 216804 8276076 5729068 47200140 0 0 0 0 687 900
> 0 0 87 12 0
> 0 1 216804 8276076 5729068 47200140 0 0 0 0 440 660
> 0 0 88 13 0
> 0 1 216804 8276108 5729068 47200108 0 0 0 0 426 644
> 0 0 87 12 0
> 0 1 216804 8276136 5729068 47200076 0 0 0 0 1303 1256
> 0 0 87 12 0
> 0 1 216804 8276132 5729076 47200076 0 0 0 192 516 702
> 0 0 87 12 0
> 0 1 216804 8276164 5729076 47200044 0 0 0 2764 1065 919
> 0 0 88 12 0
> 0 1 216804 8276164 5729076 47200044 0 0 0 0 491 683
> 0 0 87 12 0
> ^C
> [root@storage02 ~]# ps aux | grep " D "
> root 14255 0.5 0.0 0 0 ? D 10:22 0:04 [kworker/u16:4]
> root 15649 0.0 0.0 0 0 ? D 10:28 0:00 [kworker/3:1]
> root 15686 0.0 0.0 0 0 ? D 10:28 0:00 [kworker/3:3]
> root 15717 0.0 0.0 0 0 ? D 10:28 0:00 [kworker/3:5]
> root 16627 0.0 0.0 0 0 ? D 10:32 0:00 [kworker/3:9]
> root 17614 0.0 0.0 112648 964 pts/1 S+ 10:36 0:00 grep
> --color=auto D
> [root@storage02 ~]# cat /proc/buddyinfo
> Node 0, zone DMA 1 0 0 1 1 0 0
> 0 0 1 2
> Node 0, zone DMA32 2964 4379 13405 954 4 0 0
> 0 0 0 0
> Node 0, zone Normal 490525 563348 71048 11427 49 0 0
> 0 0 0 0
> [root@storage02 ~]# free -mh
> total used free shared buff/cache available
> Mem: 62G 4.3G 7.9G 19M 50G 56G
> Swap: 11G 211M 10G
>
> Does anybody have any idea about what might be wrong here?
> I would suspect a kernel bug. We couldn't try another version yet.
>
> Regards,
> --
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