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OpenZFS on Linux and FreeBSD
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BSOD when trying to edit registry variables - 2.2.3-RC1 #363

Closed JayanWarden closed 3 months ago

JayanWarden commented 3 months ago

System information

Type Version/Name
Distribution Name Windows 11 Pro
Distribution Version 23H2
Kernel Version 22631.3296
Architecture x64
OpenZFS Version zfswin-2.2.3rc1 + zfs-kmod-zfswin-2.2.3rc1

Describe the problem you're observing

I was experiencing a total filesystem hang during heavy write load. Zpool is a single SSD (Samsung 870 QVO) for testing ZFS. Load was a Steam Game install at gigabit speeds, though the IO Speed was capped by CPU power (Testing zstd-19 compression on my system right now.) Volume was able to be read (even file contents), but writing was impossible. For example, trying to create a new text document on the volume with Windows Explorer caused the Explorer to stop responding and crash.

I wanted to reduce the number of IO Workers by editing zio_taskq_batch_pct from 90 to 60 because I thought maybe that was the culprit for the filesystem hang, the System was too busy. System bluescreened as soon as I hit enter to save the new value. BugCheck Code 0x1000007e caused by ntoskrnl.exe+35367c I appended the MiniDump from the BSOD. 031724-18093-01.dmp

However, the filesystem hang is another problem, maybe related?

Describe how to reproduce the problem

lundman commented 3 months ago

so it is the regedit code - i thought it unlikely as there has been no changes. thanks

lundman commented 3 months ago

OK, turns out it was gcm_impl, in that it calls can_use_avx() which calls __cpuid() that ruined some registers. Corrected with ad3d9f7 and I rolled over to rc2 to avoid confusion.

JayanWarden commented 3 months ago

I can confirm RC2 lets me edit Registry without kernel panic. Thanks!

However before this, during further tests of RC1, I encountered another BSOD during heavy write load. Should I open a new Issue for this?

SYSTEM_THREAD_EXCEPTION_NOT_HANDLED 0x1000007e Caused by OpenZFS.sys+54de92 Parameters ffffffff80000003 fffff803964d0840 fffff00161aeee38 fffff00161aee650 031824-16859-01.dmp