This is a note to let you know that I've just added the patch titled
Btrfs: limit the global reserve to 512mb
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-limit-the-global-reserve-to-512mb.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fdf30d1c1b386e1b73116cc7e0fb14e962b763b0 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@xxxxxxxxxxxx>
Date: Tue, 26 Mar 2013 15:31:45 -0400
Subject: Btrfs: limit the global reserve to 512mb
From: Josef Bacik <jbacik@xxxxxxxxxxxx>
commit fdf30d1c1b386e1b73116cc7e0fb14e962b763b0 upstream.
A user reported a problem where he was getting early ENOSPC with hundreds of
gigs of free data space and 6 gigs of free metadata space. This is because the
global block reserve was taking up the entire free metadata space. This is
ridiculous, we have infrastructure in place to throttle if we start using too
much of the global reserve, so instead of letting it get this huge just limit it
to 512mb so that users can still get work done. This allowed the user to
complete his rsync without issues. Thanks
Reported-and-tested-by: Stefan Priebe <s.priebe@xxxxxxxxxxxx>
Signed-off-by: Josef Bacik <jbacik@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/extent-tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4217,7 +4217,7 @@ static void update_global_block_rsv(stru
spin_lock(&sinfo->lock);
spin_lock(&block_rsv->lock);
- block_rsv->size = num_bytes;
+ block_rsv->size = min_t(u64, num_bytes, 512 * 1024 * 1024);
num_bytes = sinfo->bytes_used + sinfo->bytes_pinned +
sinfo->bytes_reserved + sinfo->bytes_readonly +
Patches currently in stable-queue which might be from jbacik@xxxxxxxxxxxx are
queue-3.4/btrfs-limit-the-global-reserve-to-512mb.patch
queue-3.4/btrfs-don-t-drop-path-when-printing-out-tree-errors-in-scrub.patch
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