Re: [PATCH 2/3] vmsplice: make vmsplice a trivial wrapper for preadv2/pwritev2
"David Hildenbrand (Arm)" <[email protected]>
| Newsgroups | org.kernel.vger.linux-api,dev.linux.lists.patches,it.linux.lists.ltp,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel,org.kernel.vger.netdev,org.kvack.linux-mm |
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| Message-ID | <[email protected]> |
On 6/5/26 18:26, Mark Brown wrote: > On Fri, Jun 05, 2026 at 09:02:52AM -0700, Linus Torvalds wrote: >> On Fri, 5 Jun 2026 at 04:02, Mark Brown <[email protected]> wrote: > >>> | 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. Yeah, I quickly discussed this with Christian on a different channel and he ended up sharing the report with the analysis directly. -- Cheers, David