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b=Q3By/iIl+wAWB6NlC2hxCvyxm5XSUpTLsrE928c+38kDsIt973GEHRqGftSTW6Ddr e7likP9QdpMWzP3a32sP5Ys9S3pTBCLNaE+uPpPM2M/6oy1/1YHSxqMCW77Ss38jU+ QqcSttsQE2TakfDeLZ75mcLnKYKfftys7qdNcKRJF9dO30fcfrbED40zQsKGOcM+hY SL9embAUhiKsPdhiut0AvYCKRP5c+mTIDkQ4VtrRbvps888kVvHlZMwEiDgqGEYTPR w+WppNHEK6Cps6GnRukkoPzlaewW6VQXMq9QBiBmb1Hcggc7ChDnHnKXjp5XYg3zHM J0gGzixokOomg== Date: Sat, 3 Oct 2026 17:23:53 +0100 From: "Lorenzo Stoakes (ARM)" To: Sasha Levin Cc: rppt@kernel.org, peterz@infradead.org, akpm@linux-foundation.org, david@kernel.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, linux-mm@kvack.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, regressions@lists.linux.dev, stable@vger.kernel.org, 4ncienth@gmail.com, alexander.motin@truenas.com, caleb.stjohn@truenas.com, ameer.hamza@truenas.com Subject: Re: [REGRESSION] secretmem: SIGBUS on memfd_secret() pages while perf record runs Message-ID: References: <20261002175651.811343-1-ameer.hamza@truenas.com> <2026-10-02-rc-reply-0003-re-secretmem-sigbus-perf@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 64394C0007 X-Rspam-User: X-Stat-Signature: 9rdpi4gqnfy85q3h6k41biq5j3idqptw X-HE-Tag: 1791044640-838411 X-HE-Meta: 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 ClBih+hh kwpZ04DII3yCw4lK4d80/IKidwQa375zDRjKeQ4NBxMseL0+UZLzS82fMcExOzkee9KRa0tHHckoQIQZuHHXCc/XNMukM+BGssXC97CzekdqpXl9IaEEkMAtgQVALyTBIOJeJDJenuXxHX840l9HlQZgeWCdhiEt2AtBeXQlUrqMEmFkkomahHlMKIHxg1477T/CWUAs//Mx1TSJTwyg6B+IXc/kRR7NviKbnZox08apnPVRoEZgaveSUmNDUMofGWlqD3CLwUPfOt6bzxzqp/vsE8YdyOCT/cQKjimraoJ12xFI= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sat, Oct 03, 2026 at 10:30:10AM -0400, Sasha Levin wrote: > On Sat, Oct 03, 2026 at 10:18:34AM +0100, Lorenzo Stoakes (ARM) wrote: > > It was sent late on Friday in a week that I was ill and it's Saturday > > pre-LPC, so that's hardly a timeframe that I could reasonably have replied. > > Keep in mind that our release cycles are fairly short, so this shouldn't be too > big of a deal? I mean the same argument could be made both ways :) > > We will generally go for the safe option of dropping a commit that introduces a > regression as it's fairly easy to queue it back up very soon after a > diagnosis/fix shows up. I think we'll have to agree to disagree about what was safe in this situation! Anyway, the commit is fine as-is, and fine to be queued. I am writing a patch for what seems to be the underlying issue which appears to be related to how perf accounts things. I guess I'm going to have to pack for LPC really late today :) -- Cheers, Lorenzo