[DRBD-user] lots of "drbd_md_sync_page_io" in kernel log since 3.15 kernel

Ross Anderson rosander at dsotm.net
Tue Jul 8 17:44:47 CEST 2014

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Greetings,

I will have to echo this issue. Upgraded to 3.15.4 and started seeing lots of these messages. System is Active/Active with external metadata. 10Gb link w/ HW SAS raid. Any help appreciated.


Thanks,
Ross
  


I am using DRBD active/active cluster as well and have LVM volumes on it.
But I do not have any error messages nor do I have any errors in my VMs which are using qemu/kvm as well.

I am not even sure what my messages are telling me. I am using and external metadata disk.

Thomas

On Monday 07 July 2014 11:46:24 Marcus Pereira wrote:
>
> I have the same problem. Yesterday I upgraded to kernel 3.15.3 and my
> kernel.log is filling with this messages:
>
> Jul  7 11:23:05 virtx kernel: [55267.193678] block drbd39: meta_data io:
> kworker/u65:1 [31208]:drbd_md_sync_page_io(,16s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:05 virtx kernel: [55267.199652] block drbd39: meta_data io:
> kworker/u65:1 [31208]:drbd_md_sync_page_io(,24s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:07 virtx kernel: [55269.757781] block drbd28: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,40s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:13 virtx kernel: [55275.193624] block drbd30: meta_data io:
> kworker/u66:4 [30295]:drbd_md_sync_page_io(,56s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:13 virtx kernel: [55275.401312] block drbd9: meta_data io:
> kworker/u66:4 [30295]:drbd_md_sync_page_io(,32s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:14 virtx kernel: [55276.329633] block drbd28: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,48s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:15 virtx kernel: [55277.168129] block drbd28: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,56s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:23 virtx kernel: [55285.399803] block drbd9: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,40s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:23 virtx kernel: [55285.503232] block drbd32: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,64s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:23 virtx kernel: [55285.503809] block drbd32: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,8s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:23 virtx kernel: [55286.086788] block drbd19: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,48s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:24 virtx kernel: [55286.128598] block drbd30: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,64s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
> Jul  7 11:23:25 virtx kernel: [55287.594011] block drbd28: meta_data io:
> kworker/u66:0 [31338]:drbd_md_sync_page_io(,64s,WRITE)
> _al_write_transaction+0x4f9/0xa00 [drbd]
>
> Seems to happen on all my drbd devices (currently 52 on this server) and
> is affecting functionality.
> I use external meta-disk. Disk and meta-disk are LVM volumes and blocks
> are used by VPSs running below kvm/libvirt/qemu.
>
> Some of my guest VPS show errors like this:
> Jul  7 09:09:51 webx kernel: [28863.199248] EXT4-fs warning (device
> vda1): ext4_end_bio:317: I/O error writing to inode 1050005 (offset 0
> size 0 starting block 4871811)
> Jul  7 09:09:51 webx kernel: [28863.199278] Buffer I/O error on device
> vda1, logical block 4871555
> Jul  7 09:09:51 webx kernel: [28863.199378] EXT4-fs warning (device
> vda1): ext4_end_bio:317: I/O error writing to inode 1050005 (offset 0
> size 0 starting block 4871814)
> Jul  7 09:09:51 webx kernel: [28863.199381] Buffer I/O error on device
> vda1, logical block 4871558
> Jul  7 09:09:51 webx kernel: [28863.199383] Buffer I/O error on device
> vda1, logical block 4871559
>
> And some times the guest remount the filesystem read-only due to the errors.
>
> Marcus
>
>




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