This is a note to let you know that I've just added the patch titled
btrfs: wake up transaction thread from SYNC_FS ioctl
to the 3.17-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-wake-up-transaction-thread-from-sync_fs-ioctl.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2fad4e83e12591eb3bd213875b9edc2d18e93383 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@xxxxxxx>
Date: Wed, 23 Jul 2014 14:39:35 +0200
Subject: btrfs: wake up transaction thread from SYNC_FS ioctl
From: David Sterba <dsterba@xxxxxxx>
commit 2fad4e83e12591eb3bd213875b9edc2d18e93383 upstream.
The transaction thread may want to do more work, namely it pokes the
cleaner ktread that will start processing uncleaned subvols.
This can be triggered by user via the 'btrfs fi sync' command, otherwise
there was a delay up to 30 seconds before the cleaner started to clean
old snapshots.
Signed-off-by: David Sterba <dsterba@xxxxxxx>
Signed-off-by: Chris Mason <clm@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/ioctl.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -5283,6 +5283,12 @@ long btrfs_ioctl(struct file *file, unsi
if (ret)
return ret;
ret = btrfs_sync_fs(file->f_dentry->d_sb, 1);
+ /*
+ * The transaction thread may want to do more work,
+ * namely it pokes the cleaner ktread that will start
+ * processing uncleaned subvols.
+ */
+ wake_up_process(root->fs_info->transaction_kthread);
return ret;
}
case BTRFS_IOC_START_SYNC:
Patches currently in stable-queue which might be from dsterba@xxxxxxx are
queue-3.17/btrfs-wake-up-transaction-thread-from-sync_fs-ioctl.patch
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