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Bug#913119: linux-image-4.18.0-2-amd64: Hangs on lvm raid1

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Bug still present with the new 4.18.0-3-amd64 (4.18.20-1).

This morning I've tryed to boot this new kernel version, removing the 
workaround given by the following kernel parameters:
scsi_mod.use_blk_mq=0 dm_mod.use_blk_mq=0

The system showed disk hangs in less than 5 hours, and, as in previous 
4.17 and 4.18, normal disk activities was restored after some minutes, 
without apparent data loss. I experienced two hangs before rebooting, 
but one of them didn't produce an oops in dmesg. It was not the first 
time I saw an hang without oops: maybe those that can recover in less 
than 120 seconds, doesn't produce oopses in dmesg?

And just to be clear, it doesn't seem a bug related to LVM but more 
precisely to various types (all?) of LVM RAID. In fact my notebook disk 
uses LVM linear volumes and never showed those hangs and oopses.

Cesare.

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Bug#913119: linux-image-4.18.0-2-amd64: Hangs on lvm raid1 Cesare Leonardi <celeonar@gmail.com> - 2018-11-22 16:10 +0100
  Bug#913119: linux-image-4.18.0-2-amd64: Hangs on lvm raid1 Cesare Leonardi <celeonar@gmail.com> - 2018-11-24 00:50 +0100
    Bug#913119: linux-image-4.18.0-2-amd64: Hangs on lvm raid1 Cesare Leonardi <celeonar@gmail.com> - 2018-11-24 02:30 +0100

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