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Howlett" Cc: Bert Karwatzki , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-next@vger.kernel.org Subject: Re: commit 1c29a32ce65f4cd0f1c causes Bad rss-counter state and firefox-esr crash in linux-next-20240613 Message-Id: <20240614102149.f752c1609106b97ea302ccf0@linux-foundation.org> In-Reply-To: References: <20240613170351.cc3e7ccfa1bb198b57f31352@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: tb36519diqz7rcxzmgmcaq8se1wyte43 X-Rspamd-Queue-Id: E77CC20008 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1718385711-863395 X-HE-Meta: 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 ZsiCien9 38mPGvvR3fvuX4MljmJNck3/q07pHERtJVKSjqmu25HuIuorTb1zsPQC0WbwRbK52vTgl5rdhl3vp3I0nM9shqNesX51+PhGZg2u4e0AgEWUE0OdSrgLk6iTm0CVe7K7R59HOABIW2WVg2QIY+1E01+QzE1BOiO8XRABLMFtA/8+AaHzYjaupxjlrSNusOHEmRbD/GxO94vBah4RSzc5BBfVtOECVA/qdH3vgP6UCTV1fx7y8zjxNyoyTjA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, 14 Jun 2024 08:30:20 -0400 "Liam R. Howlett" wrote: > > > > > (these are the error messages of several crashes and the error seems to affect > > > other processes, too (T1)) > > > > > > The crash can be provoked to appear in ~1min by opening large numbers of tabs in > > > firefox-esr (by holding pressing ctrl+t for some time). With this I bisected the > > > error to commit "1c29a32ce65f mm/mmap: use split munmap calls for MAP_FIXED" and > > > reverting this commit in linux-next-20240613 fixes the issue for me. > > > > Thanks, that must have taken a lot of time. > > Yes, thank you for all that work and apologies in creating this > frustrating situation. > > Andrew, please drop the set from your branch. I need to write some more > tests, but I suspect I will need to do some work around the vma_merge() > function, which is never a fun endeavor. Dropped, thanks.