linux-kernel - Re: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset) on s390

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Message-ID: <alpine.LSU.2.11.2010111321430.15963@eggly.anvils>
Date:   Sun, 11 Oct 2020 13:23:12 -0700 (PDT)
From:   Hugh Dickins <hughd@...gle.com>
To:     Qian Cai <cai@....pw>
cc:     Matthew Wilcox <willy@...radead.org>, linux-xfs@...r.kernel.org,
        linux-mm@...ck.org, akpm@...ux-foundation.org,
        linux-s390@...r.kernel.org, heiko.carstens@...ibm.com,
        borntraeger@...ibm.com, darrick.wong@...cle.com,
        kirill@...temov.name, peterx@...hat.com,
        yang.shi@...ux.alibaba.com, hch@....de,
        linux-kernel@...r.kernel.org, songliubraving@...com
Subject: Re: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset) on s390

Adding a note to update this thread: 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.