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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 1/2] mm/huge_memory: use folio's memcg inside __folio_split() Message-Id: <20260804142708.f002cf20a34420874b8dbb21@linux-foundation.org> In-Reply-To: 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> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: B0A1D40004 X-Stat-Signature: nyhq5b3g3key63ctk1qt6zzf8s9qw4f1 X-Rspam-User: X-HE-Tag: 1785878830-85455 X-HE-Meta: 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 eNLwYnYt omB/mQg2rkRYvKTSzo4tCXLeyX3kQHDVBDYJb0q+bnaO0KKddNHmi2RuY3E7cpfSGLXySGFi9kMpTGul3F0EjrMZpzx4SurgN2NGr1UvxAXZoLQJXtxNesKmz/CSNl3+B8JGz/jnzImDtc8dIXrTmtFAggETDLwPRKWhCFHoKcwIedD59NtG37TnFQViuhYSfAojlZlvKHdwXlSJdI9e8DcCmzJqyQoeDMWFnvjjEDxbmqsRgxJDvlL+RC/GK8qmpWTgmWsi5gm0xWVTMyXaVQCKO47NA9OWDjdDITgXM7g6GsYST3QWdNCodkNO+YLkAt9jy/dtJcFgAuh/DtVWzinmOR5pnXcptQG9QgA3Xsqr3i61W4yAsyrnEAVvIju46/vmcxzu8Wj+dFL7f0h/GMYZMIQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, 4 Aug 2026 16:47:52 -0400 Johannes Weiner wrote: > > Like you said above, only xas_split_alloc() is affected. And we have not > > seen related workingset regression report (like what Johannes reported > > in commit 7b785645e8f13 ("mm: fix page cache convergence regression")). > > It might be OK to not backport. > > > > Johannes, what is your take on this? > > Yeah, let's Cc stable. > > It would be a bear to debug if you ran into this at scale. Which I > think you could with certain workloads. > > The patches are straight-forward enough. It favors a backport. I've added cc:stable to both and updated the [2/2] changelog as suggested in https://lore.kernel.org/all/DKFELWPHSJNO.3GGVW270HENEG@nvidia.com// So afaik this series is good-to-go, thanks.