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 5E5E6C4332F for ; Wed, 19 Oct 2022 00:14:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230076AbiJSAO0 (ORCPT ); Tue, 18 Oct 2022 20:14:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229882AbiJSANk (ORCPT ); Tue, 18 Oct 2022 20:13:40 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BC075D2CE4 for ; Tue, 18 Oct 2022 17:13:35 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id CE0D6B821AE for ; Wed, 19 Oct 2022 00:13:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F271C43143; Wed, 19 Oct 2022 00:13:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1666138412; bh=+4u+XHFnx9VTZYDm4OZZLOkSeV73RiOKluyAqxZ2I4c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OPVB1sLs6ZaCTMOqkm1Wuwic4nCru5ECQKGdRfUUOvGdmYguDa0Vl20neocxUQkdd +Q+7Ht/D6lUD0gBtzFiymJ2sohWUq9VhyEdt7dMbA9xDvK8zFcNOvf6yr3mQODgiKs 3ExD7afAltdCnh5EQLD1WI3IehGSsGuJjK9hfZ2YnIMvpOk4IhbxuqXYlETaHf4l/l WMqRJW6wjSftWFh6P/E50IthgAsOHdkFtV6xCrr2P209jGzEidcJO36EGs9RVPDTDu G5D3pG2HyMdPwTWZzX8QdA2EW0rYw/Vl0d4YzqwUcTsvUDQh+x7kcS6TQgGyzXS3ox vagpOwE0EaJ9g== From: SeongJae Park To: SeongJae Park , Andrew Morton Cc: damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 16/18] mm/damon/sysfs-schemes: implement DAMOS tried regions clear command Date: Wed, 19 Oct 2022 00:13:15 +0000 Message-Id: <20221019001317.104270-17-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221019001317.104270-1-sj@kernel.org> References: <20221019001317.104270-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When there are huge number of DAMON regions that specific scheme actions are tried to be applied, directories and files under 'tried_regions' scheme directory could waste some memory. Add another special input keyword for 'state' file of each kdamond sysfs directory that can be used for cleanup of the 'tried_regions' sub-directories. Signed-off-by: SeongJae Park --- mm/damon/sysfs-common.h | 4 ++++ mm/damon/sysfs-schemes.c | 17 +++++++++++++++++ mm/damon/sysfs.c | 18 ++++++++++++++++++ 3 files changed, 39 insertions(+) diff --git a/mm/damon/sysfs-common.h b/mm/damon/sysfs-common.h index 634a6e7fca78..604a6cbc3ede 100644 --- a/mm/damon/sysfs-common.h +++ b/mm/damon/sysfs-common.h @@ -50,3 +50,7 @@ int damon_sysfs_schemes_update_regions_start( struct damon_ctx *ctx); int damon_sysfs_schemes_update_regions_stop(struct damon_ctx *ctx); + +int damon_sysfs_schemes_clear_regions( + struct damon_sysfs_schemes *sysfs_schemes, + struct damon_ctx *ctx); diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 2cea58e49d8d..223de1d06740 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -1262,3 +1262,20 @@ int damon_sysfs_schemes_update_regions_stop(struct damon_ctx *ctx) damon_sysfs_schemes_region_idx = 0; return 0; } + +int damon_sysfs_schemes_clear_regions( + struct damon_sysfs_schemes *sysfs_schemes, + struct damon_ctx *ctx) +{ + struct damos *scheme; + int schemes_idx = 0; + + damon_for_each_scheme(scheme, ctx) { + struct damon_sysfs_scheme *sysfs_scheme; + + sysfs_scheme = sysfs_schemes->schemes_arr[schemes_idx++]; + damon_sysfs_scheme_regions_rm_dirs( + sysfs_scheme->tried_regions); + } + return 0; +} diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 6d26ae6052b6..acc16473f6fd 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -1001,6 +1001,9 @@ enum damon_sysfs_cmd { DAMON_SYSFS_CMD_UPDATE_SCHEMES_STATS, /* @DAMON_SYSFS_CMD_UPDATE_SCHEMES_REGIONS: Update scheme regions */ DAMON_SYSFS_CMD_UPDATE_SCHEMES_REGIONS, + /* @DAMON_SYSFS_CMD_CLEAR_SCHEMES_REGIONS: Clear scheme regions */ + DAMON_SYSFS_CMD_CLEAR_SCHEMES_REGIONS, + /* * @NR_DAMON_SYSFS_CMDS: Total number of DAMON sysfs commands. */ @@ -1014,6 +1017,7 @@ static const char * const damon_sysfs_cmd_strs[] = { "commit", "update_schemes_stats", "update_schemes_regions", + "clear_schemes_regions", }; /* @@ -1259,6 +1263,17 @@ static int damon_sysfs_upd_schemes_regions_stop( return damon_sysfs_schemes_update_regions_stop(ctx); } +static int damon_sysfs_clear_schemes_regions( + struct damon_sysfs_kdamond *kdamond) +{ + struct damon_ctx *ctx = kdamond->damon_ctx; + + if (!ctx) + return -EINVAL; + return damon_sysfs_schemes_clear_regions( + kdamond->contexts->contexts_arr[0]->schemes, ctx); +} + static inline bool damon_sysfs_kdamond_running( struct damon_sysfs_kdamond *kdamond) { @@ -1340,6 +1355,9 @@ static int damon_sysfs_cmd_request_callback(struct damon_ctx *c) damon_sysfs_schemes_regions_updating = false; } break; + case DAMON_SYSFS_CMD_CLEAR_SCHEMES_REGIONS: + err = damon_sysfs_clear_schemes_regions(kdamond); + break; default: break; } -- 2.25.1