On Fri, Jun 05, 2026 at 09:02:52AM -0700, Linus Torvalds wrote:

On Fri, 5 Jun 2026 at 04:02, Mark Brown [off-list ref] wrote:

quoted

| L4472tst_test.c:2050: TINFO: Tested kernel: 7.1.0-rc6-next-20260604 #1 SMP @1780589917 armv7l
| L4473tst_kconfig.c:71: TINFO: Couldn't locate kernel config!
| L4474tst_test.c:1875: TINFO: Overall timeout per run is 0h 00m 30s

I htink this is the same thing that Christian already noted (he said
"reported by David", but I don't know which David ;), where the
vmsplice() writev() emulation was done as a blocking write, even
though vmsplice only blocked at the beginning (ie waiting only for
_initial_ space to write, not then blocking afterwards).

Ah, yes it is - exactly the same issue that's mentioned in[1], I missed
it in the middle of the quite large thread and didn't directly find
David's report.  Sorry for the duplication there.

[1] https://lore.kernel.org/r/20260603-raumfahrt-unmerklich-ertrugen-c4ecae70d5f9@brauner (local)