From nobody Tue Apr 7 15:53:43 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 678DCC43217 for ; Mon, 17 Oct 2022 16:03:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231340AbiJQQDN (ORCPT ); Mon, 17 Oct 2022 12:03:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230490AbiJQQCt (ORCPT ); Mon, 17 Oct 2022 12:02:49 -0400 Received: from mail-ej1-x62e.google.com (mail-ej1-x62e.google.com [IPv6:2a00:1450:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E3DA66D843 for ; Mon, 17 Oct 2022 09:02:46 -0700 (PDT) Received: by mail-ej1-x62e.google.com with SMTP id sc25so25944601ejc.12 for ; Mon, 17 Oct 2022 09:02:46 -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=AFb/7zwjqK5CQviz80hJ2NborTj9HM/1n8g5QJGdbSg=; b=YiYXWC+QyyMRmUFikBr8oB0Y1Dv5Ak0+JU9eRaISPncrUtmk74un588/6vLUW20FX2 lcsMHUj1ia8PYSlFC9HVKa8LYI5/Yh0TjGpkQyJZZ4YS0bm/QH6Rv2CFRjtHZBT3b3pT 0+BPG/BTVuhoW6zArG3Q9DVL9nBrJkcTvqqVQu/jOMiJKoe+vM3ZZ6pcDUDpv1pb0fcM 4tAtotDnjQBySPAXfmWgfyTTefQF78FTuW3MoxUtYOQjsfkM6atHxIjLRfvQcYVxkVuy ova4Mkw2DwcL0fxYGdC/Heno/OPCahBGre0elnEAC15yZWG8R1irKhQOqHbNR3mi0PHl r5gw== 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=AFb/7zwjqK5CQviz80hJ2NborTj9HM/1n8g5QJGdbSg=; b=45IK+4mZnM0bcNbIA45u7fict2h6lGLw88Cc9l6mDUkNbDOAv0Rx9R6it5kTF7NGWB zxg8kSwL/48nSJ5t/cS22kqhaQjWuSc0ERqwEWovVyWaWvYXyghrX/D9xdxRD/YdMXSd 3UbtmxLYFYvubbyVBzI3JZAQ+wu5vjgkFcQFZ8NLQOdJ5Q8FDjPOM6AWqNPNZlAjxvz+ IQZQo/dAO66y3o+iVXDcHLeFoWTesODTjWvWJqNmst2QR8VGPxXHImFKC2dirEIHOAm5 eZ3c+Ko7na7FqZ+kAsPBR375b6ZeujmD5dIliYN9q9tUzUFSoQEofxrzwxPwhHMH4hgT RFog== X-Gm-Message-State: ACrzQf0CYHkCjlLX5cDGcwWO+YIgnBbz925qEnns10IfqN0EtJ9NVIZT 9rjJqGk8OxLRBN4n8CnoTh8= X-Google-Smtp-Source: AMsMyM53rJaLhk4GwF6LlPSoomVfcARTFPfJm/NqfYLKgstdDAxVM5szNB2fF2xkAFkG5XJVLI5fRQ== X-Received: by 2002:a17:907:3f94:b0:78d:9d2f:3002 with SMTP id hr20-20020a1709073f9400b0078d9d2f3002mr9099892ejc.40.1666022565358; Mon, 17 Oct 2022 09:02:45 -0700 (PDT) Received: from pc638.lan ([155.137.26.201]) by smtp.gmail.com with ESMTPSA id g16-20020a170906539000b0073d5948855asm6389629ejo.1.2022.10.17.09.02.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Oct 2022 09:02:44 -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 6/7] mm/vmalloc: Use a trace_free_vmap_area_noflush event Date: Mon, 17 Oct 2022 18:02:32 +0200 Message-Id: <20221017160233.16582-9-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" It is for a debug purpose and is called when a vmap area gets freed. This event gives some indication about: - a start address of released area; - a current number of outstanding pages; - a maximum number of allowed outstanding pages. Cc: Steven Rostedt Signed-off-by: Uladzislau Rezki (Sony) --- mm/vmalloc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 912abcd6e8b4..df4fd6674ced 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1822,6 +1822,8 @@ static void drain_vmap_area_work(struct work_struct *= work) */ static void free_vmap_area_noflush(struct vmap_area *va) { + unsigned long nr_lazy_max =3D lazy_max_pages(); + unsigned long va_start =3D va->va_start; unsigned long nr_lazy; =20 spin_lock(&vmap_area_lock); @@ -1839,8 +1841,10 @@ static void free_vmap_area_noflush(struct vmap_area = *va) &purge_vmap_area_root, &purge_vmap_area_list); spin_unlock(&purge_vmap_area_lock); =20 + trace_free_vmap_area_noflush(va_start, nr_lazy, nr_lazy_max); + /* After this point, we may free va at any time */ - if (unlikely(nr_lazy > lazy_max_pages())) + if (unlikely(nr_lazy > nr_lazy_max)) schedule_work(&drain_vmap_work); } =20 --=20 2.30.2