On 7/8/22 00:09, Yu Zhao wrote: > On Thu, Jul 7, 2022 at 3:58 PM Vlastimil Babka <vbabka@xxxxxxx> wrote: >> >> On 7/7/22 22:09, Andrew Morton wrote: >> > The patch titled >> > Subject: mm-page_alloc-protect-pcp-lists-with-a-spinlock-fix >> > has been added to the -mm mm-unstable branch. Its filename is >> > mm-page_alloc-protect-pcp-lists-with-a-spinlock-fix.patch >> > >> > This patch will shortly appear at >> > https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_alloc-protect-pcp-lists-with-a-spinlock-fix.patch >> > >> > This patch will later appear in the mm-unstable branch at >> > git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm >> > >> > Before you just go and hit "reply", please: >> > a) Consider who else should be cc'ed >> > b) Prefer to cc a suitable mailing list as well >> > c) Ideally: find the original patch on the mailing list and do a >> > reply-to-all to that, adding suitable additional cc's >> > >> > *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** >> > >> > The -mm tree is included into linux-next via the mm-everything >> > branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm >> > and is updated there every 2-3 working days >> > >> > ------------------------------------------------------ >> > From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> >> > Subject: mm-page_alloc-protect-pcp-lists-with-a-spinlock-fix >> > Date: Thu Jul 7 01:06:35 PM PDT 2022 >> > >> > add missing local_unlock_irqrestore() on contention path >> >> Doh, that's true and something to fix, although patch 7 did remove the bug >> later in the same series so that wouldn't explain the lkp report for patch >> 7. The reason lkp test robot complained was AFAICS that it was testing v4, >> as I just replied there. > > Sorry I didn't bother to reply until now: it did test v5, at this > commit, not the whole series. I meant this report that appears to be for v4 (full series including patch 7): https://lore.kernel.org/all/YsFk%2FqU+QtWun04h@xsang-OptiPlex-9020/ That reported a bug due to missing unpin that was previously reported for v4 and fixed in v5. I'm not aware of a lkp report for v5 (found only Dan's) but yeah, hitting the (similar but not identical) bug fixed by this -fix would indeed be possible in v5 if patch 7 was not applied.
