Device stats are only initialized (read from tree items) on mount.
Trying to read device stats after adding or replacing new devices will
return errors.
btrfs_init_new_device() and btrfs_init_dev_replace_tgtdev() are the two
functions that allocate and initialize new btrfs_device structures after
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 646d10d..9837439 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2041,6 +2041,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char
*device_path)
device-in_fs_metadata = 1;
a filesystem is mounted. They set the device stats to zero by using
kzalloc() which is correct for new devices.
Oh, right, got it :)
- z
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Subject: [PATCH] btrfs: init device stats for new devices
Device stats are only initialized (read from tree items) on mount.
Trying to read device stats after adding or replacing new devices will
return errors.
This cheesy patch demonstrates the problem, but this should really
-0400
Subject: [PATCH] btrfs: init device stats for new devices
Device stats are only initialized (read from tree items) on mount.
Trying to read device stats after adding or replacing new devices will
return errors.
This cheesy patch demonstrates the problem, but this should really
On Tue, Oct 01, 2013 at 12:03:05AM +0200, Ondřej Kunc wrote:
Hi Zach,
thank you for your answer and clarification. I cannot just unmount and
mount that filesystem, because it is running busy NFS server now, so I
will just try it on some testbench server. Can mount -o remount be
sufficient
