From patchwork Tue Aug 23 20:01:51 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Dryomov X-Patchwork-Id: 1089662 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p7NK2VRU006922 for ; Tue, 23 Aug 2011 20:02:31 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756091Ab1HWUC2 (ORCPT ); Tue, 23 Aug 2011 16:02:28 -0400 Received: from mail-bw0-f46.google.com ([209.85.214.46]:56659 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755878Ab1HWUC1 (ORCPT ); Tue, 23 Aug 2011 16:02:27 -0400 Received: by mail-bw0-f46.google.com with SMTP id 11so372435bke.19 for ; Tue, 23 Aug 2011 13:02:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=PsV0PVww6YnEbggKUNr8geV9QiCrOTNvnXgbB9NfEIs=; b=r+EP35cl10Lho37VSD0FaDnQNcGV9PRaPtasoOjrsGx45287APAoMlFcGMKAgtDQFZ Q0BaQ6HrnKy7dvDwvK5/mbWvHqHMOdK7gq+1Ggelr2D545MYVOH1m2fmsuV/iHQT+kXF TRX2eTHyNYPNANkkmy8f8gZqhS0Nhfg+6Xub0= Received: by 10.204.135.140 with SMTP id n12mr1821316bkt.182.1314129746655; Tue, 23 Aug 2011 13:02:26 -0700 (PDT) Received: from localhost ([31.28.235.172]) by mx.google.com with ESMTPS id y7sm81060bkq.48.2011.08.23.13.02.24 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 23 Aug 2011 13:02:25 -0700 (PDT) From: Ilya Dryomov To: linux-btrfs@vger.kernel.org Cc: Chris Mason , Hugo Mills , idryomov@gmail.com Subject: [PATCH 10/21] Btrfs: usage filter Date: Tue, 23 Aug 2011 23:01:51 +0300 Message-Id: <1314129722-31601-11-git-send-email-idryomov@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1314129722-31601-1-git-send-email-idryomov@gmail.com> References: <1314129722-31601-1-git-send-email-idryomov@gmail.com> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Tue, 23 Aug 2011 20:02:31 +0000 (UTC) Select chunks that are less than X percent full. Signed-off-by: Ilya Dryomov --- fs/btrfs/volumes.c | 33 +++++++++++++++++++++++++++++++++ fs/btrfs/volumes.h | 1 + 2 files changed, 34 insertions(+), 0 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index f045615..b49ecfa 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -2193,6 +2193,33 @@ static int chunk_profiles_filter(u64 chunk_profile, return 1; } +static u64 div_factor_fine(u64 num, int factor) +{ + if (factor == 100) + return num; + num *= factor; + do_div(num, 100); + return num; +} + +static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset, + struct btrfs_restripe_args *rargs) +{ + struct btrfs_block_group_cache *cache; + u64 chunk_used, user_thresh; + int ret = 1; + + cache = btrfs_lookup_block_group(fs_info, chunk_offset); + chunk_used = btrfs_block_group_used(&cache->item); + + user_thresh = div_factor_fine(cache->key.offset, rargs->usage); + if (chunk_used < user_thresh) + ret = 0; + + btrfs_put_block_group(cache); + return ret; +} + static int chunk_soft_convert_filter(u64 chunk_profile, struct btrfs_restripe_args *rargs) { @@ -2236,6 +2263,12 @@ static int should_restripe_chunk(struct btrfs_root *root, return 0; } + /* usage filter */ + if ((rargs->flags & BTRFS_RESTRIPE_ARGS_USAGE) && + chunk_usage_filter(rctl->fs_info, chunk_offset, rargs)) { + return 0; + } + /* soft profile changing mode */ if ((rargs->flags & BTRFS_RESTRIPE_ARGS_SOFT) && chunk_soft_convert_filter(chunk_type, rargs)) { diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 9f96ad8..c6baf4b 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -186,6 +186,7 @@ struct map_lookup { * Restripe filters */ #define BTRFS_RESTRIPE_ARGS_PROFILES (1ULL << 0) +#define BTRFS_RESTRIPE_ARGS_USAGE (1ULL << 1) /* * Profile changing flags. When SOFT is set we won't relocate chunk if