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authorArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2012-06-06 18:56:57 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2012-07-14 16:32:45 +0400
commit3dd847820d138c9d60764b0e920380373285ff10 (patch)
tree3eb6584eac00b8a6cf859d003ad0c1940e7e299c /fs/affs/affs.h
parenta215fef7edfdcd8948037ceb3060b9ae7ebcef8b (diff)
downloadlinux-3dd847820d138c9d60764b0e920380373285ff10.tar.bz2
affs: get rid of affs_sync_super
This patch makes affs stop using the VFS '->write_super()' method along with the 's_dirt' superblock flag, because they are on their way out. The whole "superblock write-out" VFS infrastructure is served by the 'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and writes out all dirty superblocks using the '->write_super()' call-back. But the problem with this thread is that it wastes power by waking up the system every 5 seconds, even if there are no diry superblocks, or there are no client file-systems which would need this (e.g., btrfs does not use '->write_super()'). So we want to kill it completely and thus, we need to make file-systems to stop using the '->write_super()' VFS service, and then remove it together with the kernel thread. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/affs/affs.h')
-rw-r--r--fs/affs/affs.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 5a726e992245..3a130e27eb15 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -3,6 +3,7 @@
#include <linux/buffer_head.h>
#include <linux/amigaffs.h>
#include <linux/mutex.h>
+#include <linux/workqueue.h>
/* AmigaOS allows file names with up to 30 characters length.
* Names longer than that will be silently truncated. If you
@@ -101,6 +102,9 @@ struct affs_sb_info {
char s_volume[32]; /* Volume prefix for absolute symlinks. */
spinlock_t symlink_lock; /* protects the previous two */
struct super_block *sb; /* the VFS superblock object */
+ int work_queued; /* non-zero delayed work is queued */
+ struct delayed_work sb_work; /* superblock flush delayed work */
+ spinlock_t work_lock; /* protects sb_work and work_queued */
};
#define SF_INTL 0x0001 /* International filesystem. */
@@ -121,6 +125,8 @@ static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
return sb->s_fs_info;
}
+void affs_mark_sb_dirty(struct super_block *sb);
+
/* amigaffs.c */
extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh);