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[172.10.233.147]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-640d2d68bf0sm3436465d50.11.2025.11.10.20.07.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Nov 2025 20:07:49 -0800 (PST) Date: Mon, 10 Nov 2025 20:07:34 -0800 (PST) From: Hugh Dickins To: Lorenzo Stoakes , Andrew Morton cc: Hugh Dickins , Chris Li , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , David Hildenbrand , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Sven Schnelle , Peter Xu , Alexander Viro , Christian Brauner , Jan Kara , Arnd Bergmann , Zi Yan , Baolin Wang , "Liam R . Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Muchun Song , Oscar Salvador , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Axel Rasmussen , Yuanchu Xie , Wei Xu , Kemeng Shi , Kairui Song , Nhat Pham , Baoquan He , SeongJae Park , Matthew Wilcox , Jason Gunthorpe , Leon Romanovsky , Xu Xin , Chengming Zhou , Jann Horn , Miaohe Lin , Naoya Horiguchi , Pedro Falcato , Pasha Tatashin , Rik van Riel , Harry Yoo , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, damon@lists.linux.dev Subject: Re: [PATCH v2 00/16] mm: remove is_swap_[pte, pmd]() + non-swap entries, introduce leaf entries In-Reply-To: <20251110162313.baee36f4815b3aeb3f12921e@linux-foundation.org> Message-ID: References: <5b60f6e8-7eab-4518-808a-b34331662da5@lucifer.local> <3c0e9dd0-70ac-4588-813b-ffb24d40f067@lucifer.local> <20251110162313.baee36f4815b3aeb3f12921e@linux-foundation.org> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Mon, 10 Nov 2025, Andrew Morton wrote: > On Mon, 10 Nov 2025 15:38:55 -0800 (PST) Hugh Dickins wrote: > > > > I'm sorry but this is not a reasonable request. I am being as empathetic and > > > kind as I can be here, but this series is proceeding without arbitrary delay. > > > > > > I will do everything I can to accommodate any concerns or issues you may have > > > here _within reason_ :) > > > > But Lorenzo, have you even tested your series properly yet, with > > swapping and folio migration and huge pages and tmpfs under load? > > Please do. > > > > I haven't had time to bisect yet, maybe there's nothing more needed > > than a one-liner fix somewhere; but from my experience it is not yet > > ready for inclusion in mm and next - it stops testing other folks' work. > > > > I haven't tried today's v3, but from the cover letter of differences, > > it didn't look like much of importance is fixed since v2: which > > (after a profusion of "Bad swap offet entry 3ffffffffffff" messages, > > not seen with v1, and probably not really serious) soon hits an Oops > > or a BUG or something (as v1 did) - I don't have any logs or notes > > to give yet, just forewarning before pursuing later in the day. > > > > If you think v3 has fixed real crashes under load, please say so: > > otherwise, I doubt it's worth Andrew hurrying to replace v2 by v3. > > Oh. Thanks. I'll move the v3 series into mm-new for now. Lorenzo, I can happily apologize: the v3 series in mm-everything- 2025-11-11-01-20 is a big improvement over v2 and v1, it is showing none of the bad behaviours I saw with those. I've not searched or compared for what actually fixed those symptoms (though have now spotted mails from Shivank and Kairui regarding 3ffffffffffff), I'm content now to move on to unrelated work... Thanks, Hugh