From e07a2ade4426a2cbafae4018aa7b6944bb627a6e Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Mon, 6 Jan 2014 09:58:27 +0800 Subject: btrfs: Add nodiscard mount option. Add nodiscard mount option to disable discard with remount option. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- Documentation/filesystems/btrfs.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'Documentation/filesystems') diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt index e87609a4e21c..7254cf501391 100644 --- a/Documentation/filesystems/btrfs.txt +++ b/Documentation/filesystems/btrfs.txt @@ -98,9 +98,12 @@ Options with (*) are default options and will not show in the mount options. can be avoided. Especially useful when trying to mount a multi-device setup as root. May be specified multiple times for multiple devices. + nodiscard(*) discard - Issue frequent commands to let the block device reclaim space freed by - the filesystem. This is useful for SSD devices, thinly provisioned + Disable/enable discard mount option. + Discard issues frequent commands to let the block device reclaim space + freed by the filesystem. + This is useful for SSD devices, thinly provisioned LUNs and virtual machine images, but may have a significant performance impact. (The fstrim command is also available to initiate batch trims from userspace). -- cgit v1.2.3