From: Ilya Dryomov <idryomov@gmail.com>
To: linux-btrfs@vger.kernel.org
Cc: Chris Mason <chris.mason@oracle.com>,
Hugo Mills <hugo@carfax.org.uk>,
idryomov@gmail.com
Subject: [PATCH 10/21] Btrfs: usage filter
Date: Tue, 23 Aug 2011 23:01:51 +0300 [thread overview]
Message-ID: <1314129722-31601-11-git-send-email-idryomov@gmail.com> (raw)
In-Reply-To: <1314129722-31601-1-git-send-email-idryomov@gmail.com>
Select chunks that are less than X percent full.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
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
--
1.7.5.4
next prev parent reply other threads:[~2011-08-23 20:01 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-23 20:01 [PATCH 00/21] [RFC] Btrfs: restriper Ilya Dryomov
2011-08-23 20:01 ` [PATCH 01/21] Btrfs: get rid of *_alloc_profile fields Ilya Dryomov
2011-09-27 12:51 ` David Sterba
2011-08-23 20:01 ` [PATCH 02/21] Btrfs: introduce masks for chunk type and profile Ilya Dryomov
2011-08-23 20:01 ` [PATCH 03/21] Btrfs: add BTRFS_AVAIL_ALLOC_BIT_SINGLE bit Ilya Dryomov
2011-11-01 7:56 ` Arne Jansen
2011-08-23 20:01 ` [PATCH 04/21] Btrfs: make avail_*_alloc_bits fields dynamic Ilya Dryomov
2011-08-23 20:01 ` [PATCH 05/21] Btrfs: add basic restriper infrastructure Ilya Dryomov
2011-11-01 10:08 ` Arne Jansen
2011-11-01 11:07 ` David Sterba
2011-11-01 11:08 ` Arne Jansen
2011-08-23 20:01 ` [PATCH 06/21] Btrfs: implement online profile changing Ilya Dryomov
2011-08-23 20:01 ` [PATCH 07/21] Btrfs: add basic infrastructure for selective balancing Ilya Dryomov
2011-09-27 13:02 ` David Sterba
2011-09-27 17:28 ` Ilya Dryomov
2011-08-23 20:01 ` [PATCH 08/21] Btrfs: soft profile changing mode (aka soft convert) Ilya Dryomov
2011-08-23 20:01 ` [PATCH 09/21] Btrfs: profiles filter Ilya Dryomov
2011-08-23 20:01 ` Ilya Dryomov [this message]
2011-09-27 13:22 ` [PATCH 10/21] Btrfs: usage filter David Sterba
2011-11-01 10:18 ` Arne Jansen
2011-08-23 20:01 ` [PATCH 11/21] Btrfs: devid filter Ilya Dryomov
2011-08-23 20:01 ` [PATCH 12/21] Btrfs: devid subset filter Ilya Dryomov
2011-08-23 20:01 ` [PATCH 13/21] Btrfs: virtual address space " Ilya Dryomov
2011-08-23 20:01 ` [PATCH 14/21] Btrfs: save restripe parameters to disk Ilya Dryomov
2011-09-27 13:43 ` David Sterba
2011-11-01 10:29 ` Arne Jansen
2011-08-23 20:01 ` [PATCH 15/21] Btrfs: recover restripe on mount Ilya Dryomov
2011-11-01 10:57 ` Arne Jansen
2011-08-23 20:01 ` [PATCH 16/21] Btrfs: allow for cancelling restriper Ilya Dryomov
2011-08-23 20:01 ` [PATCH 17/21] Btrfs: allow for pausing restriper Ilya Dryomov
2011-11-01 11:46 ` Arne Jansen
2011-08-23 20:01 ` [PATCH 18/21] Btrfs: allow for resuming restriper after it was paused Ilya Dryomov
2011-08-23 20:02 ` [PATCH 19/21] Btrfs: add skip_restripe mount option Ilya Dryomov
2011-08-23 20:02 ` [PATCH 20/21] Btrfs: get rid of btrfs_balance() function Ilya Dryomov
2011-08-23 20:02 ` [PATCH 21/21] Btrfs: add restripe progress reporting Ilya Dryomov
2011-09-27 12:47 ` [PATCH 00/21] [RFC] Btrfs: restriper David Sterba
2011-11-14 23:59 ` Phillip Susi
2011-11-15 9:22 ` Ilya Dryomov
2011-11-15 14:33 ` Phillip Susi
2011-11-15 15:06 ` Ilya Dryomov
2011-11-17 3:13 ` Phillip Susi
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