Re: [next-20210827][ppc][multipathd] INFO: task hung in dm_table_add_target
From: Christoph Hellwig <hch@lst.de>
Date: 2021-09-29 06:52:08
Also in:
dm-devel, linux-next, linux-scsi, lkml
On Tue, Sep 28, 2021 at 03:53:47PM +0530, Abdul Haleem wrote:
On 9/1/21 7:06 PM, Christoph Hellwig wrote:quoted
On Wed, Sep 01, 2021 at 04:47:26PM +0530, Abdul Haleem wrote:quoted
Greeting's multiple task hung while adding the vfc disk back to the multipath on my powerpc box running linux-next kernelCan you retry to reproduce this with lockdep enabled to see if there is anything interesting holding this lock?LOCKDEP was earlier enabled by default # cat .config | grep LOCKDEP CONFIG_LOCKDEP_SUPPORT=y BTW, Recreated again on 5.15.0-rc2 mainline kernel and attaching the logs
It seems the reinstate is blocking on the close which is blocking on flushing dirty data. In other words it looks like the link blocking looks like the symptom and not the cause.