Bug#970503: linux-image-5.8.0-1-amd64: using swap makes the machine hang

From	Vincent Lefevre <vincent@vinc17.net>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#970503: linux-image-5.8.0-1-amd64: using swap makes the machine hang
Date	2020-09-18 14:10 +0200
Message-ID	<AQnnb-5Ut-1@gated-at.bofh.it> (permalink)
References	<AQ1cZ-114-1@gated-at.bofh.it> <AQjWh-3ND-1@gated-at.bofh.it> <AQ1cZ-114-1@gated-at.bofh.it> <AQjWh-3ND-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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On 2020-09-18 10:23:01 +0200, Vincent Lefevre wrote:
> https://github.com/openzfs/zfs/issues/8552 suggests a drive firmware
> bug (which could explain the absence of errors with smartctl and
> badblocks), but in this case the kernel might have a way to avoid it.
> 
> Also I'm wondering why this issue occurs *only* with swap. This could
> mean that the problem is on the kernel side (at least partly).

As suggested by the above URL and also by
http://www.howtoeverything.net/linux/hardware/ubuntu-freeze-issue-after-ssd-upgrade
(which also mentions freeze issues with swap) I've set
libata.force=noncq, which made the error disappear. The error
no longer occurs after reboot without this kernel parameter.

Still wondering whether this is a general issue with SSD and
something can be done in the kernel.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

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Bug#970503: linux-image-5.8.0-1-amd64: using swap makes the machine hang Vincent Lefevre <vincent@vinc17.net> - 2020-09-17 14:30 +0200
  Bug#970503: linux-image-5.8.0-1-amd64: using swap makes the machine hang Vincent Lefevre <vincent@vinc17.net> - 2020-09-18 10:30 +0200
    Bug#970503: linux-image-5.8.0-1-amd64: using swap makes the machine hang Vincent Lefevre <vincent@vinc17.net> - 2020-09-18 14:10 +0200

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