Re: fstrim on raid1 LV with writemostly PV leads to system freeze

Hi folks,

Thanks for the report. I will try to reproduce this issue next week.

Song

On Fri, Sep 22, 2023 at 9:25 AM Kirill Kirilenko [off-list ref] wrote:

On 22.09.2023 00:45 +0300, Mike Snitzer wrote:

quoted

Given your use of 'writemostly' I'm inferring you're using lvm2's
raid1 that uses MD raid1 code in terms of the dm-raid target.

Yes, exactly.

On 22.09.2023 00:45 +0300, Mike Snitzer wrote:

quoted

All said: hopefully someone more MD oriented can review your report
and help you further.

Thank you. I don't need to send a new report to MD maintainers, do I?

On 22.09.2023 01:03 +0300, Roman Mamedov wrote:

quoted

Maybe your system hasn't frozen too, just taking its time in processing all
the tiny split requests.

I don't think so, because the disk activity light is off. Let me clarify:
if music was playing when the system froze, the last sound buffer begins
to play cyclically.