From b40c2e665cd552eae5fbdbb878bc29a34357668e Mon Sep 17 00:00:00 2001 From: Tino Reichardt Date: Mon, 17 Sep 2012 11:58:19 -0500 Subject: fs/jfs: TRIM support for JFS Filesystem This patch adds support for the two linux interfaces of the discard/TRIM command for SSD devices and sparse/thinly-provisioned LUNs. JFS will support batched discard via FITRIM ioctl and online discard with the discard mount option. Signed-off-by: Tino Reichardt Signed-off-by: Dave Kleikamp --- fs/jfs/jfs_filsys.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/jfs/jfs_filsys.h') diff --git a/fs/jfs/jfs_filsys.h b/fs/jfs/jfs_filsys.h index b3f5463fbe5..b67d64671bb 100644 --- a/fs/jfs/jfs_filsys.h +++ b/fs/jfs/jfs_filsys.h @@ -45,6 +45,9 @@ /* mount time flag to disable journaling to disk */ #define JFS_NOINTEGRITY 0x00000040 +/* mount time flag to enable TRIM to ssd disks */ +#define JFS_DISCARD 0x00000080 + /* commit option */ #define JFS_COMMIT 0x00000f00 /* commit option mask */ #define JFS_GROUPCOMMIT 0x00000100 /* group (of 1) commit */ -- cgit v1.2.3-18-g5258