From c289811cc096c57ff35550ee8132793a4f9b5b59 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Wed, 10 Jun 2009 09:51:32 -0400 Subject: Btrfs: autodetect SSD devices During mount, btrfs will check the queue nonrot flag for all the devices found in the FS. If they are all non-rotating, SSD mode is enabled by default. If the FS was mounted with -o nossd, the non-rotating flag is ignored. Signed-off-by: Chris Mason --- fs/btrfs/ctree.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/btrfs/ctree.h') diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index b9d8788b299e..5fa7d7d287a4 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1101,6 +1101,7 @@ struct btrfs_root { #define BTRFS_MOUNT_NOTREELOG (1 << 6) #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) +#define BTRFS_MOUNT_NOSSD (1 << 9) #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) -- cgit v1.2.2