Messages in this thread | | | Date | Thu, 27 Dec 2018 17:52:08 -0500 | From | Sasha Levin <> | Subject | Re: 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384" |
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On Thu, Dec 27, 2018 at 10:06:09PM +0100, Christian Borntraeger wrote: > > >On 12/27/2018 10:01 PM, Sasha Levin wrote: >> On Thu, Dec 27, 2018 at 10:28:56AM +0100, Christian Borntraeger wrote: >>> >>> >>> On 27.12.2018 10:13, Christian Borntraeger wrote: >>>> Martin, >>>> >>>> Right now you get a message >>>> "BUG: non-zero pgtables_bytes on freeing mm: -16384" >>>> for EVERY process that exits in 4.19.5 and later. >>>> >>>> bisect points to >>>> commit 4136161d676a93fc8df6bdb80d720c15522d6c24 >>>> Author: Martin Schwidefsky <schwidefsky@de.ibm.com> >>>> Date: Mon Oct 15 11:09:16 2018 +0200 >>>> >>>> s390/mm: fix mis-accounting of pgtable_bytes >>>> >>>> [ Upstream commit e12e4044aede97974f2222eb7f0ed726a5179a32 ] >>>> >>>> Turns out that this patch requires several dependencies so the autoselection of this >>>> patch was missing that. >>>> >>>> Can we either revert this patch or add the dependencies? >>>> >>>> Christian >>>> >>> >>> It seems that adding >>> >>> commit 6d212db11947ae5464e4717536ed9faf61c01e86 ("mm: add mm_pxd_folded checks to pgtable_bytes accounting functions") >>> fixes the issue. >> >> I've queued 6d212db11947 for 4.19 for now, thank you. > >Not sure, but you might need >1071fc5779d98 mm: introduce mm_[p4d|pud|pmd]_folded >a8874e7e8a889 mm: make the __PAGETABLE_PxD_FOLDED defines non-empty > >to avoid compile errors on !s390.
Queued those for 4.19 as well, build looks clean.
-- Thanks, Sasha
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