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[209.85.208.41]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b79f4498d2fsm1000740166b.21.2025.12.07.20.09.11 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 07 Dec 2025 20:09:11 -0800 (PST) Received: by mail-ed1-f41.google.com with SMTP id 4fb4d7f45d1cf-640aaa89697so5247616a12.3 for ; Sun, 07 Dec 2025 20:09:11 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCWTilbj1LZ4fQg9rk6UXLCpejLVoIROMIa7f0Dsxm9xLt4jg6LhqhuIkORY45AmWyzkKdVEG+87DQ==@kvack.org X-Received: by 2002:a05:6402:144a:b0:647:72a2:771 with SMTP id 4fb4d7f45d1cf-6491adf5cb1mr5006982a12.22.1765166951064; Sun, 07 Dec 2025 20:09:11 -0800 (PST) MIME-Version: 1.0 References: <20251206111533.f1b18ce84d0854b5f6d86a8f@linux-foundation.org> <5e5e24eb-6af9-464c-ab1e-f9ee55a05a24@linux.alibaba.com> In-Reply-To: From: Linus Torvalds Date: Mon, 8 Dec 2025 13:08:54 +0900 X-Gmail-Original-Message-ID: X-Gm-Features: AQt7F2qwZ98ba2_lKzAT1Sk2bdcZpr0oj3bTXTVca09vBhmN_TYgXCKX_2Zkd3Y Message-ID: Subject: Re: [GIT PULL] non-MM updates for 6.19-rc1 To: Joseph Qi Cc: Heming Zhao , Andrew Morton , Dmitry Antipov , Mark Fasheh , linux-kernel@vger.kernel.org, linux-mm@kvack.org, mm-commits@vger.kernel.org, Pasha Tatashin Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 2ADE3180008 X-Rspam-User: X-Rspamd-Server: rspam12 X-Stat-Signature: cd4et5bnsssh89oxcnuct9cw5jees5ce X-HE-Tag: 1765166954-586487 X-HE-Meta: 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 cljp2n/3 TN3XMTviwKFI+2CYuG1ce2CmLSvOA1EpSq3GJuwG0XcSWPtUpBz5SEhtrgpw3Wbz7zbDuo+G+mNULd+uz78uDzW0BNXFl3NUg59TbXcU0NCjoJr5UQ8CzKB5Rovo1DGttSd4eIpoxvMIhP/KYUrSicSgG2pEWO82Xp17HQJmUiOX8SLD0UouYz+dEJJpoCY48svj312smNP+ZkTtkZpx7verzQPqBVAF6By72bU/I4u7pQR+nfHrDUZhHQmfyVVY1mkSQIsHFSTtZ7VDdKiVbedpeR9uLaMPUL83xiTiBDO524oKsOX37eLt0Op2IM2Ktn63Zo0WI0dJKavCz6VmUSeUo3YX5JpRZLC3VkeTKLlOP7uvL44nn2MEAHWw8L74yFoQXyCrLWXtkAd1SlR0gPp6YuBNchVG11CxkVEqQ0o09bv3fHQrKYQkRirC1ZvqfgPGty/qfCjebnl6WwZbqcO2slTFULLAmDhvp 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 Mon, 8 Dec 2025 at 13:01, Joseph Qi wrote: > > It seems now new_xh->xh_count is 0. That's means, it is trying to add a > new entry and here 'last' is pointing the next free entry. No. If new_xh->xh_count is 0, nothing ever happens, because it checks for that case: if (new_xh->xh_count) { and that's the only place where 'last' is ever used. Linus