Re: [PATCH blktests 0/3] blktests: tests for the direct I/O fallback, splice, and bio trimming fixes

[Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>]

On Sep 09, 2026 / 15:39, Tal Zussman wrote:
> Three regression tests for block device fixes under review [1],
> following block/048 for the first patch of that series.
> 
> block/049 races partial O_DIRECT writes, which finish through the
> direct I/O write fallback, against BLKBSZSET. block/050 does the same
> with splice(). Both need CONFIG_DEBUG_VM to report the folio order
> mismatch, and skip on kernels without a 64K block size or with 64K
> pages.
> 
> block/051 issues trimmed O_DIRECT writes from a hugetlb mapping to a
> device with a 64K logical block size and checks that no huge pages
> leak, covering both the dropped and the shrunk bvec.
> 
> [1] https://lore.kernel.org/linux-block/20260828-blkdev-fixes-v2-0-32f3f40cebed@columbia.edu/

Thanks for the series. The patches all look good to me.

I ran the new tests cases with and without the kernel side v3 patches [2] and
confirmed that the test cases trigger the expected failures and the kernel fix
patches avoid the failrues. Good.

[2] https://lore.kernel.org/linux-block/20260909-blkdev-fixes-v3-0-1a5222c6e8ad@columbia.edu/

I will wait for the kernel side patches get settled to Linus master branch
before I apply the blktests patches.