From nobody Tue Apr 7 15:54:02 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7BAFBC433FE for ; Mon, 17 Oct 2022 16:03:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231186AbiJQQDH (ORCPT ); Mon, 17 Oct 2022 12:03:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38644 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230455AbiJQQCr (ORCPT ); Mon, 17 Oct 2022 12:02:47 -0400 Received: from mail-ed1-x533.google.com (mail-ed1-x533.google.com [IPv6:2a00:1450:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D17456DF98 for ; Mon, 17 Oct 2022 09:02:45 -0700 (PDT) Received: by mail-ed1-x533.google.com with SMTP id a67so16678499edf.12 for ; Mon, 17 Oct 2022 09:02:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=bk+KWgdlkiB+MWNzeR3WbAzUisj6JegHIR27QQQBgyQ=; b=omsUcwkM80T1HQfQByTwzQSSPIQo9VSPQ1minBRX8rzy6SbPGixUEBE2JXOujAa6uU /e/HMGViiP2taAM5sQo+EcgsE05mL14PgOfQja08E1ZZdNtuNlSWGCVBR2sHIy3q2nI1 mphMO3QpS5U7jQxSpW7nPoESPS14DMXTB7PM5ynBKRIohJMyKbYkXh8Zu53N8j1wdBLT cW/XTANXBAJ9V24Ds87XvC6xvHTgEu7+kwW0Ay3h1Iu/Vu0GstEKCWlkOr4X7rnBLNa2 WpLSDMa2+m+p3z846rzU4qw9mG4GOwP+XF5TrnV6HEeehFb/EWq17jyKIJHZm4aBU7wT 8S3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=bk+KWgdlkiB+MWNzeR3WbAzUisj6JegHIR27QQQBgyQ=; b=vj/duOie5V1q7wtF1Vrcr/kAQVrHvcjSEzcpNm9KAYQb2T1Hnsn8O1MiFR5OXQDDL7 iXSGTMWmLv+kPtR0pbxoh3ns+c+cBF2w/GwOQWBUvjp0M9ClibFPuVoe1tz/ZDhpZnQv Utzq/kQt72FcX03WxjEiUiM5Q8mAiNULRbegQ5mNTy+oXPGVAYZVItSX9XtlwOX++Hwg 4nIEmQ9Wfhkgeh7dsVGpMZ9stVKKmX6YC688ANC5s34kXJxb/PJowbxX1wawqVdXPa7Y YymFAoFv9kKP3We+pdJCKtLHP+7BZy8uvuQNz5libLxYTGadSZGdJItU7m1vw+DZBAUp 0/bw== X-Gm-Message-State: ACrzQf0ReoPRBBcAisBWY3KehlZSBirP5L+FWzGQuxRC7F0634dVjT+8 8b0DQdiSP/D8O11RWhjhZwo= X-Google-Smtp-Source: AMsMyM5N8ZQLeNkoN0ubApdyoZVPYzXh3UKtjk6V1dRHUvCK+wRZxfEtOygHvSJU00j5uoC42C8N3g== X-Received: by 2002:aa7:d454:0:b0:459:9ae7:725b with SMTP id q20-20020aa7d454000000b004599ae7725bmr10881077edr.165.1666022564305; Mon, 17 Oct 2022 09:02:44 -0700 (PDT) Received: from pc638.lan ([155.137.26.201]) by smtp.gmail.com with ESMTPSA id g16-20020a170906539000b0073d5948855asm6389629ejo.1.2022.10.17.09.02.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Oct 2022 09:02:43 -0700 (PDT) From: "Uladzislau Rezki (Sony)" To: Andrew Morton Cc: linux-mm@kvack.org, LKML , Christoph Hellwig , Matthew Wilcox , Nicholas Piggin , Uladzislau Rezki , Oleksiy Avramchenko , Steven Rostedt Subject: [PATCH 5/7] mm/vmalloc: Use a trace_purge_vmap_area_lazy event Date: Mon, 17 Oct 2022 18:02:31 +0200 Message-Id: <20221017160233.16582-8-urezki@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221017160233.16582-1-urezki@gmail.com> References: <20221017160233.16582-1-urezki@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This is for debug purpose and is called when all outstanding areas are removed back to the vmap space. It gives some extra information about: - a start:end range where set of vmap ares were freed; - a number of purged areas which were backed off. Cc: Steven Rostedt Signed-off-by: Uladzislau Rezki (Sony) --- mm/vmalloc.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index f4397817ccd7..912abcd6e8b4 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1731,6 +1731,7 @@ static void purge_fragmented_blocks_allcpus(void); static bool __purge_vmap_area_lazy(unsigned long start, unsigned long end) { unsigned long resched_threshold; + unsigned int num_purged_areas =3D 0; struct list_head local_purge_list; struct vmap_area *va, *n_va; =20 @@ -1742,7 +1743,7 @@ static bool __purge_vmap_area_lazy(unsigned long star= t, unsigned long end) spin_unlock(&purge_vmap_area_lock); =20 if (unlikely(list_empty(&local_purge_list))) - return false; + goto out; =20 start =3D min(start, list_first_entry(&local_purge_list, @@ -1777,12 +1778,16 @@ static bool __purge_vmap_area_lazy(unsigned long st= art, unsigned long end) va->va_start, va->va_end); =20 atomic_long_sub(nr, &vmap_lazy_nr); + num_purged_areas++; =20 if (atomic_long_read(&vmap_lazy_nr) < resched_threshold) cond_resched_lock(&free_vmap_area_lock); } spin_unlock(&free_vmap_area_lock); - return true; + +out: + trace_purge_vmap_area_lazy(start, end, num_purged_areas); + return num_purged_areas > 0 ? true:false; } =20 /* --=20 2.30.2