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Date:      Thu, 29 Apr 2021 20:53:35 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 255499] Freebsd 13 freezes forever on disk activity
Message-ID:  <bug-255499-227-lBRezjyRuV@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-255499-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-255499-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D255499

--- Comment #8 from teodorsigaev@gmail.com <teodorsigaev@gmail.com> ---
Hello!

I faced with freezing my desktop. When I compiled new postgres and run test=
s by
'gmake -j8 check-world' that tests never finished and box after several min=
utes
become unresponsive if current application touches disk. Even
Ctrl+Alt+Backspace after Xorg exiting doesn't return me to console command
prompt. At this moment, systat shows writes to disk with 1.7Gb per second,
although after rebooting I don't see any unexpected files, postgresql direc=
tory
takes only 4Gb spaces.=20

Also, removing ports tree causes very close sympthoms, although after 10
minutes after rm finished OS came back to work. So, after rm finished, I see
1.7Gb writes per second on disks.

I made several tries to resolve:
  - I noticed, that root terminal lives longer than terminals of unprivileg=
ed=20
    user and found that only root has unlimited memorylocked limit. Changing
    this limit - no success.
  - Tried on/off IOMMU option in kerconf. No luck.
  - increase .sujournal - again
  - Update firmware on NVMe driver - the same
  - Suggested that somehow old data on disk wasn't trimmed (TRIM/BIO_DELETE
    command) and I wrote ~1.5 Tb file and erased it in hope that system wil=
l=20
    send trim command to drive. No result.

Note, Freebsd 12.2 worked well even with -j16 parallelization. And my second
box, laptop with Freebsd 13, works well with the same args.

Pls, help me to resolve issue.

--=20
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