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]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FF99C433EF for ; Tue, 5 Apr 2022 15:10:44 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 972546B0073; Tue, 5 Apr 2022 11:10:25 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8F9608D0002; Tue, 5 Apr 2022 11:10:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 577CA8D0001; Tue, 5 Apr 2022 11:10:25 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.a.hostedemail.com [64.99.140.24]) by kanga.kvack.org (Postfix) with ESMTP id 381646B0073 for ; Tue, 5 Apr 2022 11:10:25 -0400 (EDT) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id F1C6561CFE for ; Tue, 5 Apr 2022 15:10:14 +0000 (UTC) X-FDA: 79323161148.11.9E48AE4 Received: from mail-io1-f52.google.com (mail-io1-f52.google.com [209.85.166.52]) by imf27.hostedemail.com (Postfix) with ESMTP id EF42A4003E for ; Tue, 5 Apr 2022 15:10:13 +0000 (UTC) Received: by mail-io1-f52.google.com with SMTP id x4so15486942iop.7 for ; Tue, 05 Apr 2022 08:10:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=i90PF/DM5gs1nc9riW1XFzxllCg/ID7Hqq31+vtTsic=; b=qtUTFJ/g1RvmtICeCTpIrCa5NnK+IhQBj7uH6TfjiHX7mchfUAZyJvvq2CX4JqMIdc HomyNsm3ZT7/ZlBHsHgqWzrh1bZEohlKLXpmwqxP/eLMQuphAwwtWhy2EWZ2NqabF/gA 8OOStkLcAkIVWggAWhbJ8vHVlMC4vuiOmO2XdlkQUbUtZBmnmWEIJaTmhmDF+q4F1sil TXYnJZ/8ZEChtBOY+WwBw9LGc5fDokN+eRUt2EnMX/FPP5yQtzIMzwwiAtfVUx440ZcM cWoURbq+sfF+SaaDBn6LUPmMUdkWS3/tL6CHUNxuR5SDfsJMi55XaLW0AcrzuZFK9Z4m YTiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=i90PF/DM5gs1nc9riW1XFzxllCg/ID7Hqq31+vtTsic=; b=kK5CMygHpbtoDfZq21LhvEVjRW0G49yB24Z1gSgqMIOhgVLWGWrZCozCDEPJqWYfAu 1KPwUkXFcY/smaG/QybM5V5/HQUVJPlw0/A2z1YjDN25rczkR5hfSyQ70wQlCl1MAEZb QOi+po/0XaQC2Y1EBryVN0G13saC4qli/pgJbuNh03zyDJew4DK4wtb3EQePw9zZGYlm nRpRFU+WprsLHwxuQ+AEfmNzfpD9GdjF4gqiBd/Y1tousaYuLPoquT3rlHbqzUUh8t1t ku6x7zF8nYV1miPoflyt6k+XfuI9Uf802k6PQTZ+a5+vCGuy0grJoHzlq2EAfDu/XCBq sZRA== X-Gm-Message-State: AOAM532Orxk/TnfCmU99g/uZDy5ppiEOb5ZXbl3Pc5EnMQq+A+Pq3vMJ ZZrd+oUWhocdjQtncrw+XaLPlGKqXHrC34LDXJ8= X-Google-Smtp-Source: ABdhPJzIKrOtKmaLTKqabP7XApYwn2502ZOO1zM0uFsNHRK+7ykTO0k2b9zuboHEdp/4b0O+oDEu/2B2zO5NDwQ/XZI= X-Received: by 2002:a05:6602:2b8e:b0:5e9:74e7:6b01 with SMTP id r14-20020a0566022b8e00b005e974e76b01mr2000131iov.127.1649171413078; Tue, 05 Apr 2022 08:10:13 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Andrey Konovalov Date: Tue, 5 Apr 2022 17:10:02 +0200 Message-ID: Subject: Re: [PATCH v2 0/4] kasan, arm64, scs, stacktrace: collect stack traces from Shadow Call Stack To: Mark Rutland Cc: andrey.konovalov@linux.dev, Marco Elver , Alexander Potapenko , Catalin Marinas , Will Deacon , Andrew Morton , Dmitry Vyukov , Andrey Ryabinin , kasan-dev , Vincenzo Frascino , Sami Tolvanen , Peter Collingbourne , Evgenii Stepanov , Florian Mayer , Linux Memory Management List , LKML , Andrey Konovalov Content-Type: multipart/mixed; boundary="00000000000040470005dbe9a484" Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b="qtUTFJ/g"; spf=pass (imf27.hostedemail.com: domain of andreyknvl@gmail.com designates 209.85.166.52 as permitted sender) smtp.mailfrom=andreyknvl@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Stat-Signature: ozkkq5wp959j5oz378337y6ztoka6iqc X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: EF42A4003E X-HE-Tag: 1649171413-948179 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --00000000000040470005dbe9a484 Content-Type: text/plain; charset="UTF-8" On Thu, Mar 31, 2022 at 2:39 PM Mark Rutland wrote: > > I've had a quick look into this, to see what we could do to improve the regular > unwinder, but I can't reproduce that 30% number. > > In local testing the worst can I could get to was 6-13% (with both the > stacktrace *and* stackdepot logic hacked out entirely). > > I'm testing with clang 13.0.0 from the llvm.org binary releases, with defconfig > + SHADOW_CALL_STACK + KASAN_