From: Dennis Zhou <dennis@kernel.org>
To: David Sterba <dsterba@suse.com>, Chris Mason <clm@fb.com>,
Josef Bacik <josef@toxicpanda.com>,
Omar Sandoval <osandov@osandov.com>
Cc: kernel-team@fb.com, linux-btrfs@vger.kernel.org,
Dennis Zhou <dennis@kernel.org>
Subject: [PATCH 22/22] btrfs: make smaller extents more likely to go into bitmaps
Date: Mon, 9 Dec 2019 11:46:07 -0800
Message-ID: <ac871c707edc1c281e07924fed610b885c5243dc.1575919746.git.dennis@kernel.org> (raw)
In-Reply-To: <cover.1575919745.git.dennis@kernel.org>
In-Reply-To: <cover.1575919745.git.dennis@kernel.org>
It's less than ideal for small extents to eat into our extent budget, so
force extents <= 32KB into the bitmaps save for the first handful.
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/free-space-cache.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 6a313946a8da..42db751aa896 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2108,8 +2108,8 @@ static bool use_bitmap(struct btrfs_free_space_ctl *ctl,
* of cache left then go ahead an dadd them, no sense in adding
* the overhead of a bitmap if we don't have to.
*/
- if (info->bytes <= fs_info->sectorsize * 4) {
- if (ctl->free_extents * 2 <= ctl->extents_thresh)
+ if (info->bytes <= fs_info->sectorsize * 8) {
+ if (ctl->free_extents * 3 <= ctl->extents_thresh)
return false;
} else {
return false;
--
2.17.1
next prev parent reply index
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-09 19:45 [PATCH v5 00/22] btrfs: async discard support Dennis Zhou
2019-12-09 19:45 ` [PATCH 01/22] bitmap: genericize percpu bitmap region iterators Dennis Zhou
2019-12-09 19:45 ` [PATCH 02/22] btrfs: rename DISCARD opt to DISCARD_SYNC Dennis Zhou
2019-12-09 19:45 ` [PATCH 03/22] btrfs: keep track of which extents have been discarded Dennis Zhou
2019-12-09 19:45 ` [PATCH 04/22] btrfs: keep track of cleanliness of the bitmap Dennis Zhou
2019-12-09 19:45 ` [PATCH 05/22] btrfs: add the beginning of async discard, discard workqueue Dennis Zhou
2019-12-09 19:45 ` [PATCH 06/22] btrfs: handle empty block_group removal Dennis Zhou
2019-12-09 19:45 ` [PATCH 07/22] btrfs: discard one region at a time in async discard Dennis Zhou
2019-12-09 19:45 ` [PATCH 08/22] btrfs: add removal calls for sysfs debug/ Dennis Zhou
2019-12-09 19:45 ` [PATCH 09/22] btrfs: make UUID/debug have its own kobject Dennis Zhou
2019-12-09 19:45 ` [PATCH 10/22] btrfs: add discard sysfs directory Dennis Zhou
2019-12-09 19:45 ` [PATCH 11/22] btrfs: track discardable extents for async discard Dennis Zhou
2019-12-09 19:45 ` [PATCH 12/22] btrfs: keep track of discardable_bytes Dennis Zhou
2019-12-09 19:45 ` [PATCH 13/22] btrfs: calculate discard delay based on number of extents Dennis Zhou
2019-12-09 19:45 ` [PATCH 14/22] btrfs: add bps discard rate limit Dennis Zhou
2019-12-09 19:46 ` [PATCH 15/22] btrfs: limit max discard size for async discard Dennis Zhou
2019-12-09 19:46 ` [PATCH 16/22] btrfs: make max async discard size tunable Dennis Zhou
2019-12-09 19:46 ` [PATCH 17/22] btrfs: have multiple discard lists Dennis Zhou
2019-12-09 19:46 ` [PATCH 18/22] btrfs: only keep track of data extents for async discard Dennis Zhou
2019-12-09 19:46 ` [PATCH 19/22] btrfs: keep track of discard reuse stats Dennis Zhou
2019-12-09 19:46 ` [PATCH 20/22] btrfs: add async discard header Dennis Zhou
2019-12-09 19:46 ` [PATCH 21/22] btrfs: increase the metadata allowance for the free_space_cache Dennis Zhou
2019-12-09 19:46 ` Dennis Zhou [this message]
2019-12-10 14:04 ` [PATCH v5 00/22] btrfs: async discard support David Sterba
-- strict thread matches above, loose matches on Subject: below --
2019-12-14 0:22 [PATCH v6 " Dennis Zhou
2019-12-14 0:22 ` [PATCH 22/22] btrfs: make smaller extents more likely to go into bitmaps Dennis Zhou
2019-11-25 19:46 [PATCH v4 00/22] btrfs: async discard support Dennis Zhou
2019-11-25 19:47 ` [PATCH 22/22] btrfs: make smaller extents more likely to go into bitmaps Dennis Zhou
2019-11-20 21:50 [PATCH v3 00/22] btrfs: async discard support Dennis Zhou
2019-11-20 21:51 ` [PATCH 22/22] btrfs: make smaller extents more likely to go into bitmaps Dennis Zhou
2019-10-23 22:52 [PATCH v2 00/22] btrfs: async discard support Dennis Zhou
2019-10-23 22:53 ` [PATCH 22/22] btrfs: make smaller extents more likely to go into bitmaps Dennis Zhou
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