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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2C1AC433F5 for ; Tue, 5 Oct 2021 12:26:14 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7EC5B61425 for ; Tue, 5 Oct 2021 12:26:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 7EC5B61425 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arndb.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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:Cc:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Tue, 05 Oct 2021 05:23:46 -0700 (PDT) X-Gm-Message-State: AOAM530mzhY+ragDYiLMP0pRB1rcJbNrF1oh0YGHq5slVb80MF8llWMa OGEXuLOo0wTtMz/pmgXCX0++qcRbL5qpRAetNBQ= X-Google-Smtp-Source: ABdhPJwavsMyDEVLWX0ZO/9mHt6kWM8jwo1Y/2RyZXQNh24qeRSFjiphxwtcBtuGJe9f4GCP8G4Q7x5gqqVoskGOOM4= X-Received: by 2002:a7b:c24c:: with SMTP id b12mr3116129wmj.173.1633436626183; Tue, 05 Oct 2021 05:23:46 -0700 (PDT) MIME-Version: 1.0 References: <20211005071542.3127341-1-ardb@kernel.org> <20211005071542.3127341-10-ardb@kernel.org> In-Reply-To: <20211005071542.3127341-10-ardb@kernel.org> From: Arnd Bergmann Date: Tue, 5 Oct 2021 14:23:30 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 9/9] ARM: run softirqs on the per-CPU IRQ stack To: Ard Biesheuvel Cc: Linux ARM , Russell King - ARM Linux , Arnd Bergmann , Kees Cook , Keith Packard , Linus Walleij X-Provags-ID: V03:K1:UBMMzQDZmclefU60CSPEJFpFTsMmrqCyZgUdMpKwQUnJnntHGxE iLveJ9OJJN2e84ouYOcB2mdL/HjaEh6VQHGmOD+ICd+wsbbBwvodThZU2m2l56HPqL2TeE9 ZFnlRxRkRTZwZtG+jJp4bGRaXfealixEurZbJnVlMW171yAI93sQ1Y1HIvupP/yzkoUIRmL zm9hgUF5gNMyJ9QIHg0vQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:hleC4z6hAso=:CpDZh2mJugUJ73Ar65kIXV Mg+rgaTdxvrdotImvyTVs6kytSLj6FEClcOws1nSHSdGHnN0ynRyDIC3oMViLSAGsPWY9YHHH n4ZmtR+Wqgk8w7Eqkj6y0h/MBdbZzmt7eSjsHYHmsrWdzqsABr6q3EDWkW4MvhCML+cW7tLBU 4AodlP6fk+uuDkGOmpAh5TlqWmHpTiewKZeIF8r3/5R8uJ05ly66QH4ZmKTgi3IAOp8D6t53B XL2iOS0lb7wLl0LV88kWQzuzICMZkOZSY0No0/gw031EoP+hFLuiaByD7ZAqw9f7JF6xxLJed qY5Iz5+ibDwCTpWc8uAWmCx29TAmed58xCEqAHEoGXBR0JoKJX582SiYgoD5v5A5/prquB3LU xRzIMLHTAOPN4e/DaWMy//yRmb1+T0Dx27lwStNXlpZYyYVArhThqe4t1qOizEDqJHA3t/jP9 XaJsEnBIr9evtYuFcTg/HYek9DzykQurATMTuP3hKo+9HRxYLWx7E0fXjWBV/J1qSjcy9t3Kt YKmTrsQ9wZ14hHpQ5nPVBmnNSjc+KkkoiKiBfY8z2q4Rmkwb4lUa+P/RWYrQsn1yti9Kqg218 dOoji12GPjyxF32SRLVtuICJdlaGJioqUppDmdA31eaaik0IocH8tuPkMG/JtbXIT7WsCFBQz kSOBuDlM9142PRrIhx3q3ZWcQ1x3VOL6s67vQmdqZPGs0DR1NwWDT404W5gHRRH8rIuK8cUi/ 0k8SP9L+au1Z4myDUTeRXC+4zpdbehGTTGHhVtDquQmdKaA/GxgmL+PFbXoUbXCQBM3b4e7PU 8roawXp7jOO4Qql8s5mREOSw3vNyk7sOIxmzlJMX9+Lm0VhJFraoWMiqpnjByLC0BL3wO2w1v +JEqVKxaaKRbmlZBMC9w== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211005_052348_740305_43CE10DF X-CRM114-Status: GOOD ( 16.05 ) 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="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Oct 5, 2021 at 9:15 AM Ard Biesheuvel wrote: > > Now that we have enabled IRQ stacks, any softIRQs that are handled over > the back of a hard IRQ will run from the IRQ stack as well. However, any > synchronous softirq processing that happens when re-enabling softIRQs > from task context will still execute on that task's stack. > > So let's wire up the existing infrastructure to run these softIRQs from > the IRQ stack as well. > > Signed-off-by: Ard Biesheuvel The change looks reasonable, but maybe try to explain why it is a good idea to do this. Reviewed-by: Arnd Bergmann _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel