From nobody Tue Apr 7 19:04:13 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 512BFC433FE for ; Tue, 18 Oct 2022 18:11:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230198AbiJRSLU (ORCPT ); Tue, 18 Oct 2022 14:11:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230084AbiJRSLF (ORCPT ); Tue, 18 Oct 2022 14:11:05 -0400 Received: from mail-ed1-x536.google.com (mail-ed1-x536.google.com [IPv6:2a00:1450:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C23FD733DA for ; Tue, 18 Oct 2022 11:11:03 -0700 (PDT) Received: by mail-ed1-x536.google.com with SMTP id m16so21757116edc.4 for ; Tue, 18 Oct 2022 11:11:03 -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=n8kMXp9BQAd3vgxARQi9NOKOPWDC+b4eB+IRpUUVrl4=; b=WfSPJEGUoF2C9KAvUYS570nptYgLA/TuWUM/Ysm9180aXj8gEJL6TR3123vRXv72s7 XFX+/7g1IMk6mf/h5jeA+hPg0nl725MnZQc7Q38P9jvAXr75fkC63/p0h5UmM5KUegTY D2z9K80d7tlDUECwTADSfkpPpF9Dk4ZY74npnitOV4oqWqarha84ZLQLT3Xz04BFACCB 8PwzK8coREdFHo8Pb8ZxRj4TRiqxAxYTK5AbtLBq81L/WTL8EF+6MFdsPxvosGw0b3DG dZSKqSkKwHzfCv+UALd5/k+1QbABrGTotVu4KWiVPzobmZURCQdTLLx2WkGmS1A3adcB T3Qg== 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=n8kMXp9BQAd3vgxARQi9NOKOPWDC+b4eB+IRpUUVrl4=; b=LXHjCm/Oseoks6qiYtHzMhBXcK7u2NpAGT1O0oRBan+EsC7hG2R8ayM1owcBKOqM76 +dQNDwz8t2/2mHo3qMgoaZQ641QRbdx29Pdy4S0p1FITz4X+pOlULNZPc9UPMZKwWRnc dpaiRtIswTIHf4sE1MAjBLfikKsLbZ1fyoIXnsTTojRkoSSj40eeg9GJBJjv61fsHr0i Z2aKxbMMvaKGIRyL/iSOmKGSXIy5v25i7Uv+h0RRnTFRxfT0vIq4vPHoODQG2l3t4RvT HtHF3oxBFisM00Ny1VC06qkgasSjLnsMX5mMyrUMMmAzV5/w9EyiWlUb5itrUNH6fou5 Slcg== X-Gm-Message-State: ACrzQf1fUk1QgbNr8ILYvRbQWcivHrA0+qGE4lukq4CisDdaM/DEG1Fc RPDHb9Kbu3NHQRv4hAw9Ogk= X-Google-Smtp-Source: AMsMyM7ijjHus1bRUjHQvJYBGDCBkNK0BwtjzEw9/bAky47EzLnOn5lKf4DXyLK+rkXid4XZJwz9xA== X-Received: by 2002:a05:6402:f96:b0:459:4180:6cf4 with SMTP id eh22-20020a0564020f9600b0045941806cf4mr3805343edb.64.1666116661749; Tue, 18 Oct 2022 11:11:01 -0700 (PDT) Received: from pc638.lan ([155.137.26.201]) by smtp.gmail.com with ESMTPSA id c1-20020a17090618a100b007877ad05b32sm7739302ejf.208.2022.10.18.11.11.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Oct 2022 11:11:01 -0700 (PDT) From: "Uladzislau Rezki (Sony)" To: Andrew Morton Cc: linux-mm@kvack.org, LKML , Christoph Hellwig , Matthew Wilcox , Nicholas Piggin , Steven Rostedt , Uladzislau Rezki , Oleksiy Avramchenko Subject: [PATCH v2 5/7] mm: vmalloc: Use trace_purge_vmap_area_lazy event Date: Tue, 18 Oct 2022 20:10:51 +0200 Message-Id: <20221018181053.434508-6-urezki@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221018181053.434508-1-urezki@gmail.com> References: <20221018181053.434508-1-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. Signed-off-by: Uladzislau Rezki (Sony) Reviewed-by: Christoph Hellwig --- mm/vmalloc.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index aa86f21bfad0..4292f44ae670 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