From: Ilya Dryomov <idryomov@gmail.com>
To: linux-btrfs@vger.kernel.org
Cc: Chris Mason <chris.mason@oracle.com>, idryomov@gmail.com
Subject: [PATCH 08/21] Btrfs: usage filter
Date: Fri, 6 Jan 2012 16:30:56 +0200 [thread overview]
Message-ID: <1325860269-15013-9-git-send-email-idryomov@gmail.com> (raw)
In-Reply-To: <1325860269-15013-1-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 | 36 ++++++++++++++++++++++++++++++++++++
fs/btrfs/volumes.h | 1 +
2 files changed, 37 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 315a6c2..e252cf2 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2120,6 +2120,36 @@ static int chunk_profiles_filter(u64 chunk_profile,
return 1;
}
+static u64 div_factor_fine(u64 num, int factor)
+{
+ if (factor <= 0)
+ return 0;
+ 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_balance_args *bargs)
+{
+ 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, bargs->usage);
+ if (chunk_used < user_thresh)
+ ret = 0;
+
+ btrfs_put_block_group(cache);
+ return ret;
+}
+
static int should_balance_chunk(struct btrfs_root *root,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 chunk_offset)
@@ -2147,6 +2177,12 @@ static int should_balance_chunk(struct btrfs_root *root,
return 0;
}
+ /* usage filter */
+ if ((bargs->flags & BTRFS_BALANCE_ARGS_USAGE) &&
+ chunk_usage_filter(bctl->fs_info, chunk_offset, bargs)) {
+ return 0;
+ }
+
return 1;
}
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 9c95c13..23b53bb 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -200,6 +200,7 @@ struct map_lookup {
* Balance filters
*/
#define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
+#define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
struct btrfs_balance_args;
struct btrfs_balance_control {
--
1.7.6.3
next prev parent reply other threads:[~2012-01-06 14:30 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-06 14:30 [PATCH 00/21] Btrfs: restriper Ilya Dryomov
2012-01-06 14:30 ` [PATCH 01/21] Btrfs: get rid of *_alloc_profile fields Ilya Dryomov
2012-01-06 14:30 ` [PATCH 02/21] Btrfs: introduce masks for chunk type and profile Ilya Dryomov
2012-01-06 14:30 ` [PATCH 03/21] Btrfs: add BTRFS_AVAIL_ALLOC_BIT_SINGLE bit Ilya Dryomov
2012-01-06 14:30 ` [PATCH 04/21] Btrfs: make avail_*_alloc_bits fields dynamic Ilya Dryomov
2012-01-06 14:30 ` [PATCH 05/21] Btrfs: add basic restriper infrastructure Ilya Dryomov
2012-01-06 14:30 ` [PATCH 06/21] Btrfs: add basic infrastructure for selective balancing Ilya Dryomov
2012-01-06 14:30 ` [PATCH 07/21] Btrfs: profiles filter Ilya Dryomov
2012-01-06 14:30 ` Ilya Dryomov [this message]
2012-01-06 14:30 ` [PATCH 09/21] Btrfs: devid filter Ilya Dryomov
2012-01-06 14:30 ` [PATCH 10/21] Btrfs: devid subset filter Ilya Dryomov
2012-01-06 14:30 ` [PATCH 11/21] Btrfs: virtual address space " Ilya Dryomov
2012-01-06 14:31 ` [PATCH 12/21] Btrfs: do not reduce profile in do_chunk_alloc() Ilya Dryomov
2012-01-06 14:31 ` [PATCH 13/21] Btrfs: implement online profile changing Ilya Dryomov
2012-01-06 14:31 ` [PATCH 14/21] Btrfs: soft profile changing mode (aka soft convert) Ilya Dryomov
2012-01-06 14:31 ` [PATCH 15/21] Btrfs: save balance parameters to disk Ilya Dryomov
2012-01-06 14:31 ` [PATCH 16/21] Btrfs: recover balance on mount Ilya Dryomov
2012-01-12 14:00 ` David Sterba
2012-01-12 14:29 ` Ilya Dryomov
2012-01-06 14:31 ` [PATCH 17/21] Btrfs: add skip_balance mount option Ilya Dryomov
2012-01-06 14:31 ` [PATCH 18/21] Btrfs: allow for pausing restriper Ilya Dryomov
2012-01-06 14:31 ` [PATCH 19/21] Btrfs: allow for cancelling restriper Ilya Dryomov
2012-01-06 14:31 ` [PATCH 20/21] Btrfs: allow for resuming restriper after it was paused Ilya Dryomov
2012-01-06 14:31 ` [PATCH 21/21] Btrfs: add balance progress reporting Ilya Dryomov
2012-01-09 6:50 ` [PATCH 00/21] Btrfs: restriper Marios Titas
2012-01-09 13:44 ` Ilya Dryomov
2012-01-10 18:31 ` Ilya Dryomov
2012-02-14 2:31 ` Jérôme Poulin
2012-02-14 14:18 ` Ilya Dryomov
2012-02-14 16:15 ` Jérôme Poulin
2012-02-14 16:44 ` Ilya Dryomov
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