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Fri, 18 Sep 2026 10:18:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789726733; bh=w5fb2OONy/GtAEA2nh09Nc6VmArU5Yo8QzF94WDuj7Q=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=lj1qm4nuzvY02T7ZQm88v8594RzQxLp2GRkXbWgVVtVBvfJ+6goLRgyhIpzhTJXQZ 2pCDF8LvVM9fJ6fKY4+uc/wQedLYCLDrjQbRopgkTtwyv4NIZXDsJsBsWAeToGhILW qd7/SMXEZaj32E8uUi5oBjPfqyGM9+5tnt3G7yuecWX/qsPGerXYb2JIpM5s946iF7 yX0r6HiqXBjOBn9Vf8OIhbAyKlBkfCZ5xjd2UdjefGRfUDGraENXigs62wTGvXo/Nl LkzE83NwKAHUJdQRZdZ5u09Z6Rm8qLlOmfxoay4Us/G2o7l2JK4cU7+i/D/m+wP5MR vk5oADV1Jc8tA== From: sashiko-bot@kernel.org Subject: Re: [PATCH v5 03/17] kexec: Extract kexec_free_segment_cma() from kimage_free_cma() Reply-To: sashiko-reviews@lists.linux.dev To: x86@kernel.org, me@linux.beauty, vishal.l.verma@intel.com, npiggin@gmail.com, sourabhjain@linux.ibm.com, lizhengyu3@huawei.com, dakr@kernel.org, blum@kernel.org, linux-mm@kvack.org, dave.hansen@linux.intel.com, eric.devolder@oracle.com, adityag@linux.ibm.com, akpm@linux-foundation.org, will@kernel.org, takahiro.akashi@linaro.org, bgwin@google.com, catalin.marinas@arm.com, coxu@redhat.com, zhangtianyang@loongson.cn, driver-core@lists.linux.dev, kernel@xen0n.name, kees@kernel.org, hpa@zytor.com, kas@kernel.org, seanjc@google.com, linux-kernel@vger.kernel.org, mingo@redhat.com, ritesh.list@gmail.com, sshegde@linux.ibm.com, ruirui.yang@linux.dev, jbouron@amazon.com, leitao@debian.org, tglx@kernel.org, chenhuacai@kernel.org, hbathini@linux.ibm.com, james.morse@arm.com, mclapinski@google.com, palmer@rivosinc.com, ruanjinjie@huawei.com, linux-arm-kernel@lists.infradead.org, robh@kernel.org, linux-fsdevel@vger.kernel.org, maqianga@uniontech.com, gshan@redhat.com, chleroy@kernel.org, liuk@kvack.org, exin@kylinos.cn, "Jinjie Ruan" , mpe@ellerman.id.au, pratyush@kernel.org, ardb@kernel.org, piliu@redhat.com, maddy@linux.ibm.com, yeoreum.yun@arm.com, loongarch@lists.linux.dev, baoquan.he@linux.dev, mark.rutland@arm.com, rppt@kernel.org, linuxppc-dev@lists.ozlabs.org, gregkh@linuxfoundation.org, rafael@kernel.org, chao.gao@intel.com, graf@amazon.com, thuth@redhat.com, guodongtai@kylinos.cn, bp@alien8.de, pasha.tatashin@soleen.com, tangyouling@kylinos.cn Cc: kexec@lists.infradead.org In-Reply-To: <20260918100442.3841135-4-ruanjinjie@huawei.com> References: <20260918100442.3841135-1-ruanjinjie@huawei.com> <20260918100442.3841135-4-ruanjinjie@huawei.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 18 Sep 2026 10:18:49 +0000 Message-Id: <20260918101850.7E1441F000FF@smtp.kernel.org> X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: B0E7C140008 X-Stat-Signature: n6myuf4b76y4ea8bkf4mzjfbgxf5ujje X-Rspam-User: X-HE-Tag: 1789726734-487996 X-HE-Meta: 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 jV8h7n3V 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > kimage_free_cma() relies on image->nr_segments to iterate over segments. > When an architecture loader (e.g., arm64) truncates nr_segments on a > mid-way failure, CMA pages allocated beyond the new boundary become > unreachable, causing silent memory leaks. >=20 > Extract the per-segment freeing logic into the exported helper > kexec_free_segment_cma(), so that architecture loaders can release > individual segments before nr_segments is truncated. Refactor > kimage_free_cma() to loop over the new helper, preserving existing > behavior. >=20 > Cc: Andrew Morton > Cc: Baoquan He > Cc: Mike Rapoport > Cc: Pasha Tatashin > Cc: Pratyush Yadav > Signed-off-by: Jinjie Ruan Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260918100442.3841= 135-1-ruanjinjie@huawei.com?part=3D3