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h=Date:From:To:Cc:Subject:In-Reply-To:References; b=lYtE7NpReDeqKVQNw/98ReJ6SxlDMOQ/EcHsikRsCshszDuVl14Mr6Dbg+F3d2Juh PpAR/zm/AEq+CpbMqaoiVt0iwDCwGb4v7MTXNtEEpGiGCKtdWNqr0sImp6J93F747s OhAMWvV3FlxawJoxTSRnhyW9yyLFsFcKYM3sMAlM= Date: Wed, 16 Sep 2026 15:34:26 -0700 From: Andrew Morton To: Johannes Weiner Cc: "Vlastimil Babka (SUSE)" , Salvatore Dipietro , abuehaze@amazon.com, alisaidi@amazon.com, blakgeof@amazon.com, brauner@kernel.org, brendan.jackman@linux.dev, david@redhat.com, dgc@kernel.org, dipietro.salvatore@gmail.com, djwong@kernel.org, hch@infradead.org, hch@lst.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, mhocko@suse.com, ritesh.list@gmail.com, rvvandan@amazon.com, stable@vger.kernel.org, surenb@google.com, willy@infradead.org, ziy@nvidia.com Subject: Re: [PATCH v4] mm/page_alloc: avoid direct compaction for costly __GFP_NORETRY allocations Message-Id: <20260916153426.3265e2e152cebb6a8d66373d@linux-foundation.org> In-Reply-To: References: <20260905174239.99e31515fabe220aa7d8e6fa@linux-foundation.org> <20260910114602.926944-1-dipiets@amazon.it> <8d6a8a63-4adc-458a-b548-a47bf5ff8eb7@kernel.org> 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: rspam12 X-Rspamd-Queue-Id: D7A8F40007 X-Rspam-User: X-Stat-Signature: rkifyefp4a1gxkwjft67q4uct8tboz9j X-HE-Tag: 1789598068-842968 X-HE-Meta: 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 9UryxPb8 xbkN+UhI+9hvACDl4TIrE692NmBySxaspK9A2dp7XH9aJ84zhK9OWDxPeWsVyGkpEdTRKGauuhjcTLqTGFZY+vk0fIJLv8XPNthMMt4kEP2e2ooM5pP1NNJ7AxwYgnAa9vZKH3pavmEEw8cg8j7M/VHLO1m657xXV3NCqXNc6J5Q2FS1R2HOi0A4IIm5/eRXkg+9qYxxq2YgMmsruPQ25lSXHZEOWaEj3oY4uB/dZ8cp8KTLebeWQFznsPsyfRX12ILOKfDzU7v3968EpMMgO+zxNsT3y7dG8+OsxiONYQuxCkrTu1FEOwjBiXRWBfvwydEdutMeyCnJusalZTE2tzuszpMsIhx2u45cuQFtnsJBEQh6wOf3Efd9Z3b38Iv1nUBYSO0cg2V/7Kyb5EG5MKrSsioEpNpn/bCFb1a3DVUn/OwLNlrK7+7E9IA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 16 Sep 2026 11:58:29 -0400 Johannes Weiner wrote: > > Unless I'm mistaken about that MIGRATE_HIGHATOMIC part, it seems all sashiko > > concerns can be dismissed and then indeed v4 is the better version. > > It looks like a real issue to me, but one that already exists > independent of Salvatore's change. So I'm hearing that I should drop v5 and revert to v4?