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Fri, 31 Jul 2026 23:58:19 -0700 (PDT) Date: Sat, 1 Aug 2026 02:58:18 -0400 From: Johannes Weiner To: Zi Yan Cc: Andrew Morton , Matthew Wilcox , William Kucharski , David Hildenbrand , Lorenzo Stoakes , Baolin Wang , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v2 2/2] xarray: honor XA_FLAGS_ACCOUNT in xas_split_alloc() Message-ID: References: <20260730-add-gfp_account-to-xas_split_alloc-v2-0-5a56c2361d85@nvidia.com> <20260730-add-gfp_account-to-xas_split_alloc-v2-2-5a56c2361d85@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260730-add-gfp_account-to-xas_split_alloc-v2-2-5a56c2361d85@nvidia.com> X-Rspam-User: X-Rspamd-Queue-Id: 1A30C180002 X-Rspamd-Server: rspam01 X-Stat-Signature: gr6net38bqdieyb9hw6zy5quuzssssmz X-HE-Tag: 1785567500-830709 X-HE-Meta: U2FsdGVkX1+t+7eRRwMyEnovhDp3MU3SBWkbXQ9ExPMgGT9gyE3ij7gbz65toOElYoBCQOhSpgbBh+AX5YaVOcirWtgaS+P5aPUcc6EMgN/cU1vFjaPUMrV0J+3Cott9dhEDg216EqMBl6RmlqRPtgYd3Uaj84ZjJTStzl6UmMVB+Gn8qs20rdV59jQrnrgBtJ9dvmqtC+9JY1YOypJUTWPaw7mv143AVYrIKmn2vPukUID1qscSfqEcL+eogfNv+qAfweBXErOarnoTEYvrzbaGvH0Mpz1FM+FtwHuY/lDJGZUCLCG2jefQq53VdmaaaL6e+AeDJeo7R1fwNVfNCk488FAvSO8dEvydwt+hlBsf8F6jD7i/SpA4uNmIt0qlAeW5KiWSMenxCW8/ZRXZNYSItk8J66Z46WgYKqg9oOueDwS5BjdTL+JovkvhYi1mr8c2oQTqAML07rNZK+XZhszt/E/9VflhXOlY5kx4DcjrAzX8nTfC6AiASKSbBE3gCKYfAMgw+o5XGfayOmT0FVTjwFmuloAQmz/0UhsCs4D9tNeRxUlhbr6sdvwt+nUj2n189aZf02s0L2V7OZoVrgtxBFcpoFN+scwxGkhGv6u/WiZFPrORhjZjpsmmU3GMGW27V3TEjKwLHrN4pvMyA4g4OsRSooR+VbDyV/8CycEs0r4RmqFqupVUY0aQjnr4d+Ngib6Oj+QBjaOlBJueBYuHr70iJDhvuocO83kPh/IVeMJ34AHvt1Y6XrYe7ttHJyvMiuCJRiaOPTcmUPM2vDq1AaGoMa7Nt+2OK7Hy5oX8QWe+WJVHDlyyhKilfzDLFoyOqiOxAs10ojxZEUStpUZwuKy+Y/ET/1kSdz2X9GqqjbkyN472TzMYE6SFnAmQwtAPz/tJckoKu2qWC46MoY0eXkYZnmGAFn1vFwphAqQH84dawJNvZlFx1KyntSMmECooQ3gb6k3l3ALa0mu JOfmnPvT 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Jul 30, 2026 at 10:18:01PM -0400, Zi Yan wrote: > XArray operations that allocate xa_nodes, such as xas_nomem() and > xas_alloc(), add __GFP_ACCOUNT when the array has XA_FLAGS_ACCOUNT set. > This charges the allocated memory and avoids the workingset convergence > issue described by commit 7b785645e8f13 ("mm: fix page cache convergence > regression"). > > xas_split_alloc() does not have that flag. Add it when necessary. > > Fixes: 6b24ca4a1a8d4 ("mm: Use multi-index entries in the page cache") > Signed-off-by: Zi Yan Acked-by: Johannes Weiner