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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7BBEEC38145 for ; Wed, 7 Sep 2022 13:35:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+Q33Df2EProConFDdz2CSeTGrWmO7cY22vfydhUlqus=; b=31S8zVwWxAKvrO RPQ5X+/vLkWlVKMU7zGm4A2WPZMrH4dW+2JsiW9piPki95Zh+rmu/xB93ll9qo3YgvbZjSjz3TeMs p38kEC+oDq++xsewHy/WbemWRgIUF+z/jocL8cBqbjXeLcwq167QBxNdC27UpKRAbE/4rBT7Q/ZXJ a+XHCL2AHS87KSM7RB8koRm2+fZhjM4tfe3+Cf3zXBwgiVztsC9pqsB4xhhnMhXzlHIZBVI+rsreH GflzdAkABCufWKeZceHo0Dpi1CZLMzPKTq6dVH7EstJ2xeYwfgZI7eV/yyS02gQY2GjjJFbPaynBu zcfWef1Sx2UIbr9ckIIQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oVvCN-006WzP-Q5; Wed, 07 Sep 2022 13:34:35 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oVvCL-006WyM-1b for linux-arm-kernel@lists.infradead.org; Wed, 07 Sep 2022 13:34:34 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 65F6861909; Wed, 7 Sep 2022 13:34:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFE82C433B5; Wed, 7 Sep 2022 13:34:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1662557672; bh=I4sl+EP6EIr8KxXfMp4uQHC2C2OBmBWs+1rAMJRX4M4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=I6Ng9SiTXBsmpoMT1p29Q9PdH7X2rGPAsj8DaZdXub8ywy3lDyJ1zVck3fTvlDq+s OYZj3eU1YHKGHSC+tG0k77AuIX5Oakm5S+7qFInW0ojwsmJuEYzQONYKZ0TpGM3XQ1 vs+2faJTof39ncVPaDz61SXslO4/Wls3PNLN+MvUb5j8Z/05sOSXxduQymE7pSiRkW V40tWlfCxLOHqhUG1Qj6Hku3h2X0JtYbzNPKV+xcCu9zdXQLcQNzMKingSgMfloPIX JVkSW+nAovCasfmXUFfaNqZXA6YUB2UBS0H3We6imCrgvrEO/mar5Zp6gf8DHvcwhy 6yIQCzvL5fRkQ== Date: Wed, 7 Sep 2022 14:34:27 +0100 From: Will Deacon To: Qi Zheng Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Arnd Bergmann , Catalin Marinas , Mark Rutland Subject: Re: [PATCH v3] arm64: run softirqs on the per-CPU IRQ stack Message-ID: <20220907133426.GA30248@willie-the-truck> References: <20220815124739.15948-1-zhengqi.arch@bytedance.com> <595c912a-1503-d420-f32f-297b824decae@bytedance.com> <430e3e5f-d446-6307-cba0-6f859bce560f@bytedance.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <430e3e5f-d446-6307-cba0-6f859bce560f@bytedance.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220907_063433_151465_B208F2FA X-CRM114-Status: GOOD ( 19.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Sep 07, 2022 at 03:04:48PM +0800, Qi Zheng wrote: > = > = > On 2022/8/26 12:16, Qi Zheng wrote: > > = > > = > > On 2022/8/15 20:47, Qi Zheng wrote: > > > Currently arm64 supports per-CPU IRQ stack, but softirqs > > > are still handled in the task context. > > > = > > > Since any call to local_bh_enable() at any level in the task's > > > call stack may trigger a softirq processing run, which could > > > potentially cause a task stack overflow if the combined stack > > > footprints exceed the stack's size, let's run these softirqs > > > on the IRQ stack as well. > > > = > > > Signed-off-by: Qi Zheng > > > Reviewed-by: Arnd Bergmann > > > Acked-by: Will Deacon > > > --- > > > v2: https://lore.kernel.org/lkml/20220802065325.39740-1-zhengqi.arch@= bytedance.com/ > > > v1: https://lore.kernel.org/lkml/20220708094950.41944-1-zhengqi.arch@= bytedance.com/ > > > RFC: https://lore.kernel.org/lkml/20220707110511.52129-1-zhengqi.arch= @bytedance.com/ > > > = > > > Changelog in v2 -> v3: > > > =A0 - rebase onto the v6.0-rc1 > = > Hi Will, > = > Are we good to merge this patch? Or if there is anything else I need to > do, please let me know. :) I'm expecting Catalin to pick this one up for 6.1. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel