From 19b2a2c71979f849cadc33af3577f739cc95e1f0 Mon Sep 17 00:00:00 2001
From: Dennis Zhou <dennis@kernel.org>
Date: Thu, 2 Jan 2020 16:26:38 -0500
Subject: btrfs: make max async discard size tunable

Expose max_discard_size as a tunable via sysfs and switch the current
fixed maximum to the default value.

Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/ctree.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'fs/btrfs/ctree.h')

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index f58b1cfeeca6..fa6c95fdf5c6 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -469,6 +469,7 @@ struct btrfs_discard_ctl {
 	u64 prev_discard;
 	atomic_t discardable_extents;
 	atomic64_t discardable_bytes;
+	u64 max_discard_size;
 	unsigned long delay;
 	u32 iops_limit;
 	u32 kbps_limit;
-- 
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