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 X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF109C433FE for ; Mon, 13 Sep 2021 17:03:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C213F60F9F for ; Mon, 13 Sep 2021 17:03:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241730AbhIMREZ (ORCPT ); Mon, 13 Sep 2021 13:04:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53540 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238966AbhIMREY (ORCPT ); Mon, 13 Sep 2021 13:04:24 -0400 Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91A08C061574 for ; Mon, 13 Sep 2021 10:03:08 -0700 (PDT) Received: by mail-pf1-x432.google.com with SMTP id x7so9438666pfa.8 for ; Mon, 13 Sep 2021 10:03:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=frWu/JoUaXMXlQeR23mYrB0fgcNWVG++fwwYDmdHa4w=; b=jH+jgXCDCf41ZSHz9662zsAbn9A1ikMEcI08nO1dpYSf5byrUCpY/RJc1zQ2VRnhP0 KLfxCdTPr7HxtncsTRM8KQ3naXZQLEE5k+Y7KmzUQgvOuKzeOX835vyyN0C5P7WGyw2i /locR0780r8b+j5rC7AFi5z8A2GBqBjc68SHIiJb/+llBMWWfqhRY0wT7jY9yj7F/lwP weWo8pkeuspx6heUbeD/lKGAyoei41eziWUMagCF07noCIqpoUuggGHXgoQUKeOTh7wz NqATfzOjxmiFREK1+Egn1haEztdY1paD4feosxruwJ6dS2JKQLt9mgN/qWrqzia/aZ0b FTHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=frWu/JoUaXMXlQeR23mYrB0fgcNWVG++fwwYDmdHa4w=; b=3443JVdKCTHZc3D1uvX/aqf22vineKnrDkQl32z8DbrFRvsBTpfeAQA29igjOJJdLl byzFPOn70V+SR6HHaQBKhV5YV94hMYGyOh5HQlUShxBzgYHIynrEqZcb/vxVXmAnV1/P BVBYscEtoVjNeyIqVgzc4mcliAUtvkjemdTkXsi4dhlYCCk9kAH9wBS7aOg9rvMG8EFe Mci69JnPOuGpubVMZNJ+ZC0aMX3UJPaO5JpgKlaJ9sBCaYjqVGJLqKsVTeU5vAyJOVjV CNCCKBnHx9f8Z+JipnOUThj0Gj0SvS2Ecrg8MmSf2KikYPjG57bsW0ZIod0vvpW2cmyp TA6w== X-Gm-Message-State: AOAM533Vyt+4HdVt3y8gQs13ER7tMcZW3tYW3WA0S50xmMEl8ZUP65tw h43wuL0ftfOv/gM5DUFF8bgm6ONe7OM= X-Google-Smtp-Source: ABdhPJzoGTMD2m4u5bIjm2nE49ZiivfXqDpDL9bxyCZL+CR5IQWney1Q8cfjdX/g016Djkr0j5UTAA== X-Received: by 2002:a63:9a19:: with SMTP id o25mr12129014pge.61.1631552587899; Mon, 13 Sep 2021 10:03:07 -0700 (PDT) Received: from localhost (2603-800c-1a02-1bae-e24f-43ff-fee6-449f.res6.spectrum.com. [2603:800c:1a02:1bae:e24f:43ff:fee6:449f]) by smtp.gmail.com with ESMTPSA id q5sm4512106pjd.30.2021.09.13.10.03.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Sep 2021 10:03:07 -0700 (PDT) Sender: Tejun Heo Date: Mon, 13 Sep 2021 07:03:06 -1000 From: Tejun Heo To: Marco Elver Cc: Andrew Morton , Shuah Khan , Lai Jiangshan , Andrey Konovalov , Walter Wu , Sebastian Andrzej Siewior , Thomas Gleixner , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Vijayanand Jitta , Vinayak Menon , "Gustavo A. R. Silva" , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Aleksandr Nogikh , Taras Madan Subject: Re: [PATCH v2 6/6] workqueue, kasan: avoid alloc_pages() when recording stack Message-ID: References: <20210913112609.2651084-1-elver@google.com> <20210913112609.2651084-7-elver@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210913112609.2651084-7-elver@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 13, 2021 at 01:26:09PM +0200, Marco Elver wrote: > While there is an increased risk of failing to insert the stack trace, > this is typically unlikely, especially if the same insertion had already > succeeded previously (stack depot hit). For frequent calls from the same > location, it therefore becomes extremely unlikely that > kasan_record_aux_stack_noalloc() fails. > > Link: https://lkml.kernel.org/r/20210902200134.25603-1-skhan@linuxfoundation.org > Reported-by: Shuah Khan > Signed-off-by: Marco Elver > Tested-by: Shuah Khan > Acked-by: Sebastian Andrzej Siewior Acked-by: Tejun Heo Please feel free to route with the rest of series or if you want me to take these through the wq tree, please let me know. Thanks. -- tejun