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[44.242.192.44]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a78e4f3911sm1184151a91.15.2026.10.02.20.31.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Oct 2026 20:31:14 -0700 (PDT) From: Ayush Ranjan To: Pedro Falcato Cc: Ayush Ranjan , Hugh Dickins , Matthew Wilcox , Andrew Morton , Jan Kara , Baolin Wang , David Hildenbrand , Gregory Price , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [BUG] shmem: FALLOC_FL_PUNCH_HOLE vs fault-around race corrupts page cache / rss counters Date: Sat, 3 Oct 2026 03:31:03 +0000 Message-ID: <20261003033107.1488699-1-ayushr@modal.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260925065013.3682431-1-ayushr@modal.com> References: <20260924061708.1645968-1-ayushr@modal.com> <20260925053027.1998394-1-ayushr@modal.com> <20260925065013.3682431-1-ayushr@modal.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi all, Gentle ping on this. The reproducer in my previous mail [1] triggers "Bad page cache ... still mapped when deleted" on 6.18.46 within a couple of minutes on a 128-CPU bare-metal box, with no fork() and no gVisor involved. We continue to hit this in production at low frequency, so I am happy to test patches or collect more data if that would help. Thanks, Ayush [1] https://lore.kernel.org/all/20260925065013.3682431-1-ayushr@modal.com/