Re: [PATCH 6.7 438/641] md: bypass block throttle for superblock update

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> For now, I'm going to keep both commits in the stable trees, as that
> matches what is in Linus's tree

Please consider reverting bed9e27baf52 in both Linus' tree and the
stable trees. That would keep them in sync while keeping this new
regression out of the kernel.

> as this seems to be hard to reproduce
> and I haven't seen any other reports of issues.

The change that caused the regression itself purports to fix a
two-year old regression. But since that alleged regression has been in
the kernel for two years, seemingly without much (if any) public
complaint, I'd say that the new regression caused by bed9e27baf52 is
definitely the easier one to reproduce (I hit it within hours after
upgrading to 6.7.1).

I've also reproduced this regression in a fresh Fedora 39 VM that I
just spun up to try to reproduce it in a different environment. I can
reproduce it both with the vanilla stable v6.6.13 sources as well as
with the distribution kernel (6.6.13-200-fc39.x86_64). Song, I'm happy
to provide the details of how I built this VM, or even the VM's
libvirt XML and disk images, if that would help with your efforts to
reproduce the problem.

-- Dan




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