Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)

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To: Denis Lisov <dennis.lissov@xxxxxxxxx>
Subject: Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)
From: Hugh Dickins <hughd@xxxxxxxxxx>
Date: Sun, 11 Oct 2020 13:21:12 -0700 (PDT)
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>, Song Liu <songliubraving@xxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "bugzilla-daemon@xxxxxxxxxxxxxxxxxxx" <bugzilla-daemon@xxxxxxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>
In-reply-to: <20200501180513.GB29705@bombadil.infradead.org>
References: <bug-206569-27@https.bugzilla.kernel.org/> <bug-206569-27-Tvdf5Wtr8t@https.bugzilla.kernel.org/> <20200219144635.3b7417145de19b65f258c943@linux-foundation.org> <20200220002520.GT24185@bombadil.infradead.org> <CAB3rFOtneJXg_bjf1aqZZR7ffWWq4Y81durLg7u9YvSV7nEH5Q@mail.gmail.com> <367AD482-11D3-44D6-94DC-ED4D395084C8@fb.com> <CAB3rFOvmdWV7EozxKRBt-RR1ytROgc7qH1pP86vQZWE+LcY9ug@mail.gmail.com> <C593D994-7DAC-440B-B558-80D955A17AA2@fb.com> <20200501180513.GB29705@bombadil.infradead.org>
User-agent: Alpine 2.11 (LSU 23 2013-08-11)

Adding a note to help update bugzilla 206569: the v5.9 tree now has
033b5d775511 ("mm/khugepaged: fix filemap page_to_pgoff(page) != offset")
which fixes this VM_BUG_ON_PAGE (or data corruption) when CONFIG_NUMA
is not set: we are hoping that may have have been the problem here.

References:
- Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)
  - From: Andrew Morton
- Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)
  - From: Matthew Wilcox
- Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)
  - From: Denis Lisov
- Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)
  - From: Song Liu
- Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)
  - From: Denis Lisov
- Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)
  - From: Song Liu
- Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset)
  - From: Matthew Wilcox

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