From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=160.30.148.34 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794227615; b=Mez3QZb/xpwWhXkFBaokqY1qkPKi0svWORb0Ihu8WCyuEdgcgTXX93+e2vKMuo6NdfbC hDpkq1Noq6SJuUZ8cKhXZ4Rjoi+XpEqhsTH4HVl876FPG81kvZWYMALVaz6LniDil4UIr sbrr/0ACMsviBFCSKHus76aGfy1GA43eCe6iycVRK87c3fynCLheqpqmqkiGJ/hEELkmi k5GRoQtdTbLfZ1bW82TbAKXArRgFk121sYkuzeTXR0V7UAJh2hX2xcdPi34V6tiZm8lbJ Fb1bDYZLWBTwmOve2dr527MUoornpzU6MfM3kEwETpe9I3J4u+o/p3OYRpwbgfgUz5w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794227615; h=DMARC-Filter:Received:DKIM-Signature:Received:Received: X-Zmail-TransId:X-Mailer:Message-ID:In-Reply-To:References:Date: Mime-Version:From:To:Cc:Subject:Content-Type:X-MAIL:X-TLS: X-ENVELOPE-SENDER:X-SOURCE-IP:X-CLEAN:X-Fangmail-Anti-Spam-Filtered: X-Fangmail-MID-QID; bh=4M5v/hY+kOczd+ysevcmCc3bFFIgJbCT2vaUCNfx0mo=; b=wRGT5MacQyq0pHxXi9t0McCbWi6biqqCxAQ39r1Zr/UIy1MNgXzUnHAEC4cnPlkRSGt4 E8yKj4EP4tzEQtQWtyLOOdRKXSVcOpc8RbQ7gUd0VEbEcewqwLm0C1oQhPCx78PTT6zmd vY+yXwgoUX7SLWeFefLT23bloEa+sqgNoMIHP4wDDFJ5SaI8h9Ap+eGUHOIy/n/lTpedo EO34DzL4540KgJBG14YUym8HCuzb1JzBkIOtY+j+AFVbGwDuXYVRxr8zPGcT7ksFtojDR HR7WhRpDKP9z2WiMgZTXtnroP177IBIRE91res4X3ljygpAXos+RAc3l8y7qxa1HK4w== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=zte.com.cn; spf=pass smtp.mailfrom=zte.com.cn; dkim=pass header.d=zte.com.cn header.i=@zte.com.cn header.a=rsa-sha256 header.s=z202610 header.b=D9q8JT8D; arc=none smtp.remote-ip=160.30.148.34 Received: from mxhk.zte.com.cn (mxhk.zte.com.cn [160.30.148.34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D95A606A323; Mon, 9 Nov 2026 12:33:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 8D95A606A323 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zte.com.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zte.com.cn Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=zte.com.cn header.i=@zte.com.cn header.a=rsa-sha256 header.s=z202610 header.b=D9q8JT8D Received: from mse-fl1.zte.com.cn (unknown [10.5.228.132]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mxhk.zte.com.cn (FangMail) with ESMTPS id 4jNTj029Snz4yjSd; Mon, 09 Nov 2026 20:33:24 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=zte.com.cn; s=z202610; t=1794227604; bh=7kW5/iwLHrpMe+gbCylgUW1piFSCHLbOCGCPJrQrg5g=; h=In-Reply-To:References:Date:From:To:Cc:Subject; b=D9q8JT8DuAWXDjWcC89uERCcCfC+MLDCWmvj71QmjpRLv8dZb0umVfFZjHUrfh5bT TJfZsrjNGsl9pd+hLzYKoHyvHcSpegVOgdtrkoTkfWwFM2CXJZ4sT7NkKModcfr//1 kwVQTi7mazZ3rIqojeWm5EdKAHzfcEtgSARI3RxOMpiFg/wrPVvH/qoAGkt2zqjQHz U9GgykQy01Xd9wumDQUwg2vA2yTEu8HQdCIt4swMF0yTrM19BPCVj5cmCuxJZ8Czvj KWi3b4vX5YlC8xcvrebKPLhL4kPWektgRsIPxZDjUa2j3VWvAHkcQLSnvlcJ8zfSQy ugm17/iscIeLg== Received: from xaxapp05.zte.com.cn ([10.99.98.109]) by mse-fl1.zte.com.cn with SMTP id 6A9CXHx7000110; Mon, 9 Nov 2026 20:33:17 +0800 (+08) (envelope-from shao.mingyin@zte.com.cn) Received: from mapi (xaxapp04[null]) by mapi (Zmail) with MAPI id mid32; Mon, 9 Nov 2026 20:33:20 +0800 (CST) X-Zmail-TransId: 2afb6af1bd90e10-bac93 X-Mailer: Zmail v1.0 Message-ID: <20261109203320542JEYrsjSWEO22mMpmG7U_n@zte.com.cn> In-Reply-To: <3b00799f-2fef-44bc-b798-79273c5c0ca7@kernel.org> References: 20261108142831046W_fbNCAFfuY0BjHPCCHgi@zte.com.cn,3b00799f-2fef-44bc-b798-79273c5c0ca7@kernel.org Date: Mon, 9 Nov 2026 20:33:20 +0800 (CST) X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Mime-Version: 1.0 From: To: , Cc: , , , , , , , , , Subject: =?UTF-8?B?UmU6IFtQQVRDSCB2Ml0gbW0vbWlncmF0ZTogZml4IHNvZnRsb2NrdXAgaW4gZG9fcGFnZXNfbW92ZSgpIHdpdGggaHVnZSBwYWdlIGFycmF5cw==?= Content-Type: text/plain; charset="UTF-8" X-MAIL:mse-fl1.zte.com.cn 6A9CXHx7000110 X-TLS: YES X-ENVELOPE-SENDER: shao.mingyin@zte.com.cn X-SOURCE-IP: 10.5.228.132 unknown Mon, 09 Nov 2026 20:33:24 +0800 X-CLEAN: YES X-Fangmail-Anti-Spam-Filtered: true X-Fangmail-MID-QID: 6AF1BD94.000/4jNTj029Snz4yjSd Hi David, fair enough -- and your reading is correct: preempt=none is unselectable under PREEMPT_DYNAMIC, and the arches that can still pick PREEMPT_NONE have no NUMA, so mainline cannot reach this path. I was aiming at the 6.6 LTS configs that shipped PREEMPT_NONE + NUMA: two lines of cond_resched(), no behaviour change, same as do_pages_stat() got in 8e934ab44389. If you and Andrew would rather not carry a stable-only fix, just say so and I will withdraw it. Thanks, Shao