From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 35DCAC61DD6 for ; Sun, 30 Aug 2026 00:42:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3D1B06B0088; Sat, 29 Aug 2026 20:42:24 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 382926B008A; Sat, 29 Aug 2026 20:42:24 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2984A6B008C; Sat, 29 Aug 2026 20:42:24 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 0B7426B0088 for ; Sat, 29 Aug 2026 20:42:24 -0400 (EDT) Received: from smtpin01.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 8F9F5A01FC for ; Sun, 30 Aug 2026 00:42:23 +0000 (UTC) X-FDA: 85156084566.01.E815E76 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf15.hostedemail.com (Postfix) with ESMTP id EA19AA0009 for ; Sun, 30 Aug 2026 00:42:21 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=SV0icf9X; spf=pass (imf15.hostedemail.com: domain of akpm@linux-foundation.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1788050542; b=jqsUJFr6ZD+XIrfhrK1BUlHO2TZbluQFz83WPPzBfxOhrdOv9FwfG24fNdwFPhtUBpxHN6 /fBC4NyOmQcGpvLFBV5CD3U+4dB9k4pjKTSRboVYI1Ne+tbVHB9/memxYDukD3goRo6V12 +5kRMT/JW0o9lIpotoA5rZ+R/2Jnhxo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1788050542; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Rb4xEC514rL8RB4hHk5hsrJ5d856ovaUy3Z49tjYAx0=; b=Dz3b3mu2PKZxa5Ljm9lG+1vconn2fn+QSsneCdKzcja3J5iGrVBkvF8r68JkNjW22b1KU9 DJ+oogv+JTI+1woyvoB7oGOlV2sEpKXYdoIDzLL2nUEI4CKZaGS79HhJuRVw8TBHskI+lD p05cokZjfYToVHIVsveivfEYGDcRtNc= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=SV0icf9X; spf=pass (imf15.hostedemail.com: domain of akpm@linux-foundation.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 6B8FB600AE; Sun, 30 Aug 2026 00:42:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B59161F000E9; Sun, 30 Aug 2026 00:42:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1788050541; bh=Rb4xEC514rL8RB4hHk5hsrJ5d856ovaUy3Z49tjYAx0=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=SV0icf9XNL8ZxbctcyAIM46gZXeJQW3d+vRCQ/i3WsiaRhzeYIDMCtbcdETuI5hc1 onYQb8AgOZwAjr25Im4ziTtdVk+0TNtQoGiWrY7tbadrZxIJOnimL9gbA8ksuCossx nViWZmlkCpuiiYK3QNwEou1JKddc/MCvEpYgrcu0= Date: Sat, 29 Aug 2026 17:42:20 -0700 From: Andrew Morton To: Michal Hocko Cc: Tao Cui , Shakeel Butt , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, hannes@cmpxchg.org, roman.gushchin@linux.dev, muchun.song@linux.dev, Tao Cui Subject: Re: [PATCH] mm: page_counter: reject empty string in page_counter_memparse() Message-Id: <20260829174220.204771edba7c52511dc08641@linux-foundation.org> In-Reply-To: References: <20260817042652.74136-1-cui.tao@linux.dev> <9bd74181-2ce4-4d69-a353-614685559ceb@linux.dev> 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-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: EA19AA0009 X-Stat-Signature: squmm4tzdyiezexi1nodeo6jatigaabq X-HE-Tag: 1788050541-951879 X-HE-Meta: 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 nnjaWph0 rxDsZVbae4iT71x67ZvmxoWngIP0KHdhSUase117veBYmzy59DxeIc5BnU6I0OWILlYu0aFObnmRrvT1Km9Ytk93T/tRDvNppcYW7iw3wOm3fB41PkL/D8Cpv6STOKe3n656t+coCE2bXTIXKxGgjyp3UB24Tn8/zQcqf13KPM6bKkvcawOfZI+LiqT/LAKLjvVIui/z9TikGKEgdx91CpxB2tzl13jW5+aLVBEVYBirP9XgyRQgI1qmZNWzu6O4pbZZZmRl8+UgnZ5qFgq6jH6RZIVJBpRVI+rkpwDUWHxC4KPvSHoyDuV2xcpG0JCMBSk/0YOR4AkJrjEBBntev/rMFmD9eE/NaHnvn8Mw9t/UGsR5CCf4hE7MaYJw6tyKDRgzR Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 19 Aug 2026 09:00:36 +0200 Michal Hocko wrote: > > Whether that benefit outweighs the compatibility risk is not mine to > > decide. > > And I am still not convinced. I do understand your frustration from the > debugging the issue. In any way, if other maintainers decide this change > is worth I will not stand in the way. Shakeel seems OK with it. Other other maintainers are being aloof ;) I'll queue it for now, along with a note that additional poking is needed. A v2 would be nice, please. Add details about that production incident and make the requested update to Documentation/admin-guide/cgroup-v2.rst.