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* [linux-lvm] LVM RAID: task mdX_raid1:221 blocked for more than 120 seconds
@ 2018-11-24 23:30 Cesare Leonardi
  2018-11-26  7:25 ` Jack Wang
  2018-11-26  8:49 ` Zdenek Kabelac
  0 siblings, 2 replies; 7+ messages in thread
From: Cesare Leonardi @ 2018-11-24 23:30 UTC (permalink / raw)
  To: linux-lvm

Since my message did not reach the list, I'm resending, but first I've 
subscribed myself.

------------------
Hello, I'm writing here to have your opinion and possibly some advice 
about some Debian bugs related to LVM RAID that are still unresolved:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=913119
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=913138
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=904822

Bug #913119 was filed by me, so I can personally provide some more 
information and do tests.

Premises related di Debian unstable:
* Debian's kernel is currently 4.18.20.
* From kernel 4.17~rc7 Debian enabled SCSI_MQ_DEFAULT and DM_MQ_DEFAULT.
* Debian's LVM userland is 2.02.176

The above reports shows blocked I/O with different type of LVM RAID and 
with #913119 I've succesfully workarounded passing the following kernel 
parameters:
scsi_mod.use_blk_mq=0 dm_mod.use_blk_mq=0

I've read that RHEL will default to enabling SCSI_MQ_DEFAULT and 
DM_MQ_DEFAULT and will use kernel 4.18. Maybe you have already 
encountered this bug and it's already resolved. Or there are patches 
pending.

What do you think? Should I file a bug in Red Hat bug tracker?

Cesare.

^ permalink raw reply	[flat|nested] 7+ messages in thread
* [linux-lvm] LVM RAID: task mdX_raid1:221 blocked for more than 120 seconds
@ 2018-11-24 15:43 Cesare Leonardi
  0 siblings, 0 replies; 7+ messages in thread
From: Cesare Leonardi @ 2018-11-24 15:43 UTC (permalink / raw)
  To: linux-lvm

Hello, I'm writing here to have your opinion and possibly some advice 
about some Debian bugs related to LVM RAID that are still unresolved:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=913119
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=913138
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=904822

Bug #913119 was filed by me, so I can personally provide some more 
information and do tests.

Premises related di Debian unstable:
* Debian's kernel is currently 4.18.20.
* From kernel 4.17~rc7 Debian enabled SCSI_MQ_DEFAULT and DM_MQ_DEFAULT.
* Debian's LVM userland is 2.02.176

The above reports shows blocked I/O with different type of LVM RAID and 
with #913119 I've succesfully workarounded passing the following kernel 
parameters:
scsi_mod.use_blk_mq=0 dm_mod.use_blk_mq=0

I've read that RHEL will default to enabling SCSI_MQ_DEFAULT and 
DM_MQ_DEFAULT and will use kernel 4.18. Maybe you have already 
encountered this bug and it's already resolved. Or there are patches 
pending.

What do you think? Should I file a bug in Red Hat bug tracker?

Please, keep me in CC as I'm not subscribed to the list.

Cesare.

^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2018-11-26 12:43 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-11-24 23:30 [linux-lvm] LVM RAID: task mdX_raid1:221 blocked for more than 120 seconds Cesare Leonardi
2018-11-26  7:25 ` Jack Wang
2018-11-26  8:49 ` Zdenek Kabelac
2018-11-26 11:31   ` Cesare Leonardi
2018-11-26 11:40     ` Zdenek Kabelac
2018-11-26 12:43       ` Cesare Leonardi
  -- strict thread matches above, loose matches on Subject: below --
2018-11-24 15:43 Cesare Leonardi

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