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Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org References: <20260730-add-gfp_account-to-xas_split_alloc-v2-0-5a56c2361d85@nvidia.com> <20260730-add-gfp_account-to-xas_split_alloc-v2-1-5a56c2361d85@nvidia.com> From: Baolin Wang In-Reply-To: <20260730-add-gfp_account-to-xas_split_alloc-v2-1-5a56c2361d85@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 4C12D160003 X-Stat-Signature: 5p1ony384su85tsmmfxmpaed15d8xsxk X-HE-Tag: 1785724794-377736 X-HE-Meta: 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 4qOVFHUx lajr5cKGky8dblcmY+EnjqKnxwMCpQTDdSNDtQSq1QuJjTq7/8YgOq/78ZVM5yd7osHSH/jBeewa6wrbcpPQ5ApkelEuB0L2PgyntVSq7+gpugjve3J/hxLwAfORdzeOsC0j/D/CoyeABtf5JM7dguRCvjiXvaLjunuTy/LBWyzYJiR7vUmh1MifVQLA5hWP/BmZoZTujAXwiM7iFc0Ww2+oZQUutuLRi/oxY2yFypVlA2SiAIeHLywHzxaxQpl2kN67qKQQQwzFYMmBZAk0JsL96EJi3fBmRI/qh4Ffq3fXTsItBatOnBqW39JeGNloizGPVauaGQFVZSCJjpOJI0zM7S2PjSKJXRSsip5ynrIGHBbN/IymP4AZNq2tJBT3MBdV0m1cREMPtb6fBYQX5fNzMkdeOWNkJKsd7fgiqchPolof44oy6vLvWKQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/31/26 10:18 AM, Zi Yan wrote: > During a pagecache folio split, an xarray node allocation can happen and > needs to charge at folio's memcg instead of folio split invoker's memcg, > because for example folio split can happen during reclaim and reclaim's > active memcg might not be folio's memcg. Switch to folio's memcg at the > beginning and switch back afterwards. > > Suggested-by: Johannes Weiner > Fixes: 6b24ca4a1a8d4 ("mm: Use multi-index entries in the page cache") > Signed-off-by: Zi Yan > --- LGTM. Reviewed-by: Baolin Wang