[Gluster-users] [Gluster-devel] glusterfsd crash due to page allocation failure

Tue Dec 22 17:15:57 UTC 2015

Niels,

 > 1. how is infiniband involved/configured in this environment?

gfsib01bkp and gfs02bkp are connected via infiniband. We are using tcp 
transport as I never was able to get RDMA to work.

Volume Name: gfsbackup
Type: Distribute
Volume ID: e78d5123-d9bc-4d88-9c73-61d28abf0b41
Status: Started
Number of Bricks: 7
Transport-type: tcp
Bricks:
Brick1: gfsib01bkp.corvidtec.com:/data/brick01bkp/gfsbackup
Brick2: gfsib01bkp.corvidtec.com:/data/brick02bkp/gfsbackup
Brick3: gfsib02bkp.corvidtec.com:/data/brick01bkp/gfsbackup
Brick4: gfsib02bkp.corvidtec.com:/data/brick02bkp/gfsbackup
Brick5: gfsib02bkp.corvidtec.com:/data/brick03bkp/gfsbackup
Brick6: gfsib02bkp.corvidtec.com:/data/brick04bkp/gfsbackup
Brick7: gfsib02bkp.corvidtec.com:/data/brick05bkp/gfsbackup

 > 2. was there a change/update of the driver (kernel update maybe?)
Before upgrading these servers from gluster 3.6.6 to 3.7.6, I did a 'yum 
update' which did upgrade the kernel.
Current kernel is 2.6.32-573.12.1.el6.x86_64

 > 3. do you get a coredump of the glusterfsd process when this happens?
There are a series of core files in / around the same time that this 
happens.
-rw-------    1 root root  168865792 Dec 22 10:45 core.3700
-rw-------    1 root root  168861696 Dec 22 10:45 core.3661
-rw-------    1 root root  168861696 Dec 22 10:45 core.3706
-rw-------    1 root root  168861696 Dec 22 10:45 core.3677
-rw-------    1 root root  168861696 Dec 22 10:45 core.3669
-rw-------    1 root root  168857600 Dec 22 10:45 core.3654
-rw-------    1 root root  254345216 Dec 22 10:45 core.3693
-rw-------    1 root root  254341120 Dec 22 10:45 core.3685

 > 4. is this a fuse mount process, or a brick process? (check by PID?)
I have rebooted the machine as it was in a bad state and I could no 
longer write to the gluster volume.
When it does it again, I will check the PID.

This machine has both brick processses and fuse mounts.  The storage 
servers mount the volume through a fuse mount and then I use rsync to 
backup my primary storage system.

David

>>  Hello,
>>
>>  We've recently upgraded from gluster 3.6.6 to 3.7.6 and have started
>>  encountering dmesg page allocation errors (stack trace is appended).
>>
>>  It appears that glusterfsd now sometimes fills up the cache 
>>completely and
>>  crashes with a page allocation failure. I *believe* it mainly happens 
>>when
>>  copying lots of new data to the system, running a 'find', or similar. 
>>Hosts
>>  are all Scientific Linux 6.6 and these errors occur consistently on 
>>two
>>  separate gluster pools.
>>
>>  Has anyone else seen this issue and are there any known fixes for it 
>>via
>>  sysctl kernel parameters or other means?
>>
>>  Please let me know of any other diagnostic information that would 
>>help.
>
>Could you explain a little more about this? The below is a message from
>the kernel telling you that the mlx4_ib (Mellanox Infiniband?) driver 
>is
>requesting more continuous memory than is immediately available.
>
>So, the questions I have regarding this:
>
>1. how is infiniband involved/configured in this environment?
>2. was there a change/update of the driver (kernel update maybe?)
>3. do you get a coredump of the glusterfsd process when this happens?
>4. is this a fuse mount process, or a brick process? (check by PID?)
>
>Thanks,
>Niels
>
>
>>
>>  Thanks,
>>  Patrick
>>
>>
>>  [1458118.134697] glusterfsd: page allocation failure. order:5, 
>>mode:0x20
>>  > [1458118.134701] Pid: 6010, comm: glusterfsd Not tainted
>>  > 2.6.32-573.3.1.el6.x86_64 #1
>>  > [1458118.134702] Call Trace:
>>  > [1458118.134714]  [<ffffffff8113770c>] ? 
>>__alloc_pages_nodemask+0x7dc/0x950
>>  > [1458118.134728]  [<ffffffffa0321800>] ? 
>>mlx4_ib_post_send+0x680/0x1f90
>>  > [mlx4_ib]
>>  > [1458118.134733]  [<ffffffff81176e92>] ? kmem_getpages+0x62/0x170
>>  > [1458118.134735]  [<ffffffff81177aaa>] ? fallback_alloc+0x1ba/0x270
>>  > [1458118.134736]  [<ffffffff811774ff>] ? cache_grow+0x2cf/0x320
>>  > [1458118.134738]  [<ffffffff81177829>] ? 
>>____cache_alloc_node+0x99/0x160
>>  > [1458118.134743]  [<ffffffff8145f732>] ? 
>>pskb_expand_head+0x62/0x280
>>  > [1458118.134744]  [<ffffffff81178479>] ? __kmalloc+0x199/0x230
>>  > [1458118.134746]  [<ffffffff8145f732>] ? 
>>pskb_expand_head+0x62/0x280
>>  > [1458118.134748]  [<ffffffff8146001a>] ? 
>>__pskb_pull_tail+0x2aa/0x360
>>  > [1458118.134751]  [<ffffffff8146f389>] ? 
>>harmonize_features+0x29/0x70
>>  > [1458118.134753]  [<ffffffff8146f9f4>] ? 
>>dev_hard_start_xmit+0x1c4/0x490
>>  > [1458118.134758]  [<ffffffff8148cf8a>] ? 
>>sch_direct_xmit+0x15a/0x1c0
>>  > [1458118.134759]  [<ffffffff8146ff68>] ? dev_queue_xmit+0x228/0x320
>>  > [1458118.134762]  [<ffffffff8147665d>] ? 
>>neigh_connected_output+0xbd/0x100
>>  > [1458118.134766]  [<ffffffff814abc67>] ? 
>>ip_finish_output+0x287/0x360
>>  > [1458118.134767]  [<ffffffff814abdf8>] ? ip_output+0xb8/0xc0
>>  > [1458118.134769]  [<ffffffff814ab04f>] ? __ip_local_out+0x9f/0xb0
>>  > [1458118.134770]  [<ffffffff814ab085>] ? ip_local_out+0x25/0x30
>>  > [1458118.134772]  [<ffffffff814ab580>] ? ip_queue_xmit+0x190/0x420
>>  > [1458118.134773]  [<ffffffff81137059>] ? 
>>__alloc_pages_nodemask+0x129/0x950
>>  > [1458118.134776]  [<ffffffff814c0c54>] ? 
>>tcp_transmit_skb+0x4b4/0x8b0
>>  > [1458118.134778]  [<ffffffff814c319a>] ? tcp_write_xmit+0x1da/0xa90
>>  > [1458118.134779]  [<ffffffff81178cbd>] ? __kmalloc_node+0x4d/0x60
>>  > [1458118.134780]  [<ffffffff814c3a80>] ? tcp_push_one+0x30/0x40
>>  > [1458118.134782]  [<ffffffff814b410c>] ? tcp_sendmsg+0x9cc/0xa20
>>  > [1458118.134786]  [<ffffffff8145836b>] ? sock_aio_write+0x19b/0x1c0
>>  > [1458118.134788]  [<ffffffff814581d0>] ? sock_aio_write+0x0/0x1c0
>>  > [1458118.134791]  [<ffffffff8119169b>] ? 
>>do_sync_readv_writev+0xfb/0x140
>>  > [1458118.134797]  [<ffffffff810a14b0>] ? 
>>autoremove_wake_function+0x0/0x40
>>  > [1458118.134801]  [<ffffffff8123e92f>] ? 
>>selinux_file_permission+0xbf/0x150
>>  > [1458118.134804]  [<ffffffff812316d6>] ? 
>>security_file_permission+0x16/0x20
>>  > [1458118.134806]  [<ffffffff81192746>] ? do_readv_writev+0xd6/0x1f0
>>  > [1458118.134807]  [<ffffffff811928a6>] ? vfs_writev+0x46/0x60
>>  > [1458118.134809]  [<ffffffff811929d1>] ? sys_writev+0x51/0xd0
>>  > [1458118.134812]  [<ffffffff810e88ae>] ? 
>>__audit_syscall_exit+0x25e/0x290
>>  > [1458118.134816]  [<ffffffff8100b0d2>] ? 
>>system_call_fastpath+0x16/0x1b
>>  >
>
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>