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From: Shakeel Butt To: Dave Chinner Cc: Usama Arif , brauner@kernel.org, qi.zheng@linux.dev, jack@suse.cz, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Al Viro , linux-mm@kvack.org, hughd@google.com, boris@bur.io, clm@fb.com, dsterba@suse.com, linux-btrfs@vger.kernel.org, cem@kernel.org, linux-xfs@vger.kernel.org, hannes@cmpxchg.org, riel@surriel.com, kernel-team@meta.com Subject: Re: [PATCH] fs: push nr_cached_objects memcg gating into individual filesystems Message-ID: References: <20260714101454.1202449-1-usama.arif@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT X-Stat-Signature: 7wrykfcujawoponh7f4s9xatcrbaebc8 X-Rspamd-Queue-Id: D6D4D40004 X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1784069695-104973 X-HE-Meta: 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 PNSG0m0B 68P2zPN79PxYXi3j5kop+SFPtjKLR+dKaAZLnHrZ9pGF7YqXt6MPWslULrCvGMUAhG6muHzmBWoMm0WEX0D41QXzSm64Y+A1K0Z1W3eNQN6SxkfVTrPV/oqvCM69O90nhKxofyWXVstYBej6Itxj4qLV1i443g5r0IiVj2jV71ErAFCsuPgdfl0NvNnDXV9lbGPmtG0f9gNbEpFat/EVYwqYPhx8b2ubDKEH8iVo56Oe/gnbA662PrWIEXk5r05Sm5D48qgwSlUgsyTwR9z64qlSPug== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Jul 15, 2026 at 08:22:36AM +1000, Dave Chinner wrote: > On Tue, Jul 14, 2026 at 03:14:54AM -0700, Usama Arif wrote: > > Commit 0baad6f9b997 ("fs/super: skip non-memcg-aware nr_cached_objects > > in memcg slab shrink") added a check in fs/super.c that skips the > > ->nr_cached_objects() hook whenever the shrinker is invoked for a > > non-root memcg, because none of the current implementations (btrfs, > > xfs, shmem huge) honour sc->memcg. > > I don't see that commit in an upstream tree. I'm guessing I wasn't > cc'd on it, either, because I don't recall seeing that as a patch, > either. https://lore.kernel.org/all/20260609123047.1948242-1-usama.arif@linux.dev/