Messages in this thread | | | Subject | Re: Regression 4.17-rc1: SSD doesn’t properly res ume causing system hang (NULL pointer dereference) | From | Paul Menzel <> | Date | Wed, 25 Apr 2018 14:34:50 +0200 |
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Dear Bart,
On 04/25/18 14:26, Bart Van Assche wrote: > On Wed, 2018-04-25 at 07:37 +0200, Paul Menzel wrote: >> Am 24.04.2018 um 23:17 schrieb Bart Van Assche: >>> On Tue, 2018-04-24 at 23:04 +0200, Paul Menzel wrote: >>>> I applied your change, and rebuilt the Linux kernel. Unfortunately, it >>>> looks like, it didn’t make a difference. >>> >>> In that case I don't know what is causing the failure. Can you run a bisect >>> to determine which commit introduced this regression? >> >> With `scsi_mod.use_blk_mq=n` the system resumes fine, so for to me >> unknown reasons, that Kconfig option get selected in my Linux kernel >> configuration. I remember having similar issues when this was enabled by >> default in Linux 4.13-rc?, so it was just a configuration problem and >> not a regression. Unfortunately, the Linux configuration files are not >> under version control, so I cannot check, but it is probably my fault. >> >> Sorry for the noise, and please tell me, what I can do to get the option >> working on this old device.
> Did the same system boot fine with a previous kernel with scsi-mq enabled?
No, as far as I know it never worked, see thread *[Regression 4.13-rc1] Resume does not work on Lenovo X60t* [1].
> Anyway, we would like to know what is the root cause such that this NULL > pointer dereference can be fixed. There are namely plans to remove the > legacy block layer in the not too distant future.
I’ll be happy to test proposed changes.
Kind regards,
Paul
PS: Your mailer also changed *doesn’t* to *doesn* in the subject line.
[1] https://www.spinics.net/lists/linux-scsi/msg111457.html
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