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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41B77C61D9C for ; Wed, 22 Nov 2023 23:25:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232953AbjKVXZb (ORCPT ); Wed, 22 Nov 2023 18:25:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229453AbjKVXZa (ORCPT ); Wed, 22 Nov 2023 18:25:30 -0500 Received: from out-178.mta0.migadu.com (out-178.mta0.migadu.com [IPv6:2001:41d0:1004:224b::b2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C70AC199 for ; Wed, 22 Nov 2023 15:25:25 -0800 (PST) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1700695524; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=dIP68Sfayd7Btc+B0Ey1P6bn1vCBpsnFEN+7f1RnHmY=; b=a+xYFgN1q5vbNFYogOWrJxLSQUs5HjfgpzE8YsBiaqKzWEpu679gb012GNy5KvmGxwMPh2 nDedlShTYQe6N2NuhmsVtN6HcMmZDU3EMYJrrbZTL3SXPOb6w3m/iG0T9k3jLDSI5ZHna9 Fm2PzoldoaOMxM8HbrfLwqsX9mb4lkQ= From: Kent Overstreet To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Kent Overstreet Subject: [PATCH 0/7] shrinker debugging improvements Date: Wed, 22 Nov 2023 18:25:05 -0500 Message-ID: <20231122232515.177833-1-kent.overstreet@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset does a few things to aid in OOM debugging, in particular when shrinkers are involved: - improves the show_mem OOM report: it now reports on shrinkers, and for both shrinkers and slab we only report the top 10 entries, sorted, not the full list - add shrinker_to_text(), for the show_mem report and debugfs, and a an optional shrinker.to_text() callback to report extra driver-specific information - add extra counters for the shrinker_to_text() report - implement shrinker.to_text() for bcachefs, giving an example of how to use the callbacks Daniel Hill (1): bcachefs: add counters for failed shrinker reclaim Kent Overstreet (6): seq_buf: seq_buf_human_readable_u64() mm: shrinker: Add a .to_text() method for shrinkers mm: shrinker: Add new stats for .to_text() mm: Centralize & improve oom reporting in show_mem.c mm: shrinker: Add shrinker_to_text() to debugfs interface bcachefs: shrinker.to_text() methods fs/bcachefs/btree_cache.c | 102 +++++++++++++++++++++++++++------- fs/bcachefs/btree_cache.h | 2 +- fs/bcachefs/btree_key_cache.c | 14 +++++ fs/bcachefs/btree_types.h | 10 ++++ fs/bcachefs/sysfs.c | 2 +- include/linux/seq_buf.h | 4 ++ include/linux/shrinker.h | 12 +++- lib/seq_buf.c | 10 ++++ mm/oom_kill.c | 23 -------- mm/show_mem.c | 20 +++++++ mm/shrinker.c | 89 ++++++++++++++++++++++++++++- mm/shrinker_debug.c | 18 ++++++ mm/slab.h | 6 +- mm/slab_common.c | 52 ++++++++++++++--- 14 files changed, 305 insertions(+), 59 deletions(-) -- 2.42.0