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Thu, 11 Dec 2025 03:12:28 -0800 (PST) MIME-Version: 1.0 References: <20251203212918.82f1c9d3947940aeae263878@linux-foundation.org> In-Reply-To: <20251203212918.82f1c9d3947940aeae263878@linux-foundation.org> From: Daniel Palmer Date: Thu, 11 Dec 2025 20:12:18 +0900 X-Gm-Features: AQt7F2pjiWEZyxvl20iOM4iIJeABt_nySwUNutYZyMkhTNqx4SiZjDgYKztpZuI Message-ID: Subject: Re: [GIT PULL] MM updates for 6.19-rc1 To: Andrew Morton Cc: Linus Torvalds , linux-mm@kvack.org, linux-kernel@vger.kernel.org, mm-commits@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 09DFC40008 X-Stat-Signature: e5ti6zdi9khyipquj7k1i978nhutiuer X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1765451549-764868 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Andrew, On Thu, 4 Dec 2025 at 14:29, Andrew Morton wrote: > mm/page_alloc: prevent reporting pcp->batch = 0 I think, maybe, the following part of this patch broke nommu. - new_batch = max(1, zone_batchsize(zone)); + new_batch = zone_batchsize(zone); Before this change on nommu zone_batchsize() returns 0 but the max() changes it to 1. Now it'll stay as 0 and anywhere that depends on it not being 0 won't work? I'm seeing a deadlock on nommu: https://lore.kernel.org/lkml/20251211102607.2538595-1-daniel@thingy.jp/ Thanks, Daniel