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xfs: use xfs_sync_inodes() for device flushing

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Currently xfs_device_flush calls sync_blockdev() which is
a no-op for XFS as all it's metadata is held in a different
address to the one sync_blockdev() works on.

Call xfs_sync_inodes() instead to flush all the delayed
allocation blocks out. To do this as efficiently as possible,
do it via two passes - one to do an async flush of all the
dirty blocks and a second to wait for all the IO to complete.
This requires some modification to the xfs-sync_inodes_ag()
flush code to do efficiently.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Dave Chinner
2009-04-06 18:44:54 +02:00
committed by Christoph Hellwig
parent 9d7fef74b2
commit a8d770d987
5 changed files with 38 additions and 30 deletions
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43
fs/xfs/linux-2.6/xfs_sync.c
View File

@@ -62,12 +62,6 @@ xfs_sync_inodes_ag(
uint32_t first_index = 0;
int error = 0;
int last_error = 0;
int fflag = XFS_B_ASYNC;
if (flags & SYNC_DELWRI)
fflag = XFS_B_DELWRI;
if (flags & SYNC_WAIT)
fflag = 0; /* synchronous overrides all */
do {
struct inode *inode;
@@ -128,11 +122,23 @@ xfs_sync_inodes_ag(
* If we have to flush data or wait for I/O completion
* we need to hold the iolock.
*/
if ((flags & SYNC_DELWRI) && VN_DIRTY(inode)) {
xfs_ilock(ip, XFS_IOLOCK_SHARED);
lock_flags |= XFS_IOLOCK_SHARED;
error = xfs_flush_pages(ip, 0, -1, fflag, FI_NONE);
if (flags & SYNC_IOWAIT)
if (flags & SYNC_DELWRI) {
if (VN_DIRTY(inode)) {
if (flags & SYNC_TRYLOCK) {
if (xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED))
lock_flags |= XFS_IOLOCK_SHARED;
} else {
xfs_ilock(ip, XFS_IOLOCK_SHARED);
lock_flags |= XFS_IOLOCK_SHARED;
}
if (lock_flags & XFS_IOLOCK_SHARED) {
error = xfs_flush_pages(ip, 0, -1,
(flags & SYNC_WAIT) ? 0
: XFS_B_ASYNC,
FI_NONE);
}
}
if (VN_CACHED(inode) && (flags & SYNC_IOWAIT))
xfs_ioend_wait(ip);
}
xfs_ilock(ip, XFS_ILOCK_SHARED);
@@ -400,9 +406,9 @@ xfs_syncd_queue_work(
void *data,
void (*syncer)(struct xfs_mount *, void *))
{
struct bhv_vfs_sync_work *work;
struct xfs_sync_work *work;
work = kmem_alloc(sizeof(struct bhv_vfs_sync_work), KM_SLEEP);
work = kmem_alloc(sizeof(struct xfs_sync_work), KM_SLEEP);
INIT_LIST_HEAD(&work->w_list);
work->w_syncer = syncer;
work->w_data = data;
@@ -445,23 +451,24 @@ xfs_flush_inode(
* (IOW, "If at first you don't succeed, use a Bigger Hammer").
*/
STATIC void
xfs_flush_device_work(
xfs_flush_inodes_work(
struct xfs_mount *mp,
void *arg)
{
struct inode *inode = arg;
sync_blockdev(mp->m_super->s_bdev);
xfs_sync_inodes(mp, SYNC_DELWRI | SYNC_TRYLOCK);
xfs_sync_inodes(mp, SYNC_DELWRI | SYNC_TRYLOCK | SYNC_IOWAIT);
iput(inode);
}
void
xfs_flush_device(
xfs_flush_inodes(
xfs_inode_t *ip)
{
struct inode *inode = VFS_I(ip);
igrab(inode);
xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_device_work);
xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work);
delay(msecs_to_jiffies(500));
xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
}
@@ -497,7 +504,7 @@ xfssyncd(
{
struct xfs_mount *mp = arg;
long timeleft;
bhv_vfs_sync_work_t *work, *n;
xfs_sync_work_t *work, *n;
LIST_HEAD (tmp);
set_freezable();