xfs: remove xfs_qm_sync
Now that we can't have any dirty dquots around that aren't in the AIL we can get rid of the explicit dquot syncing from xfssyncd and xfs_fs_sync_fs and instead rely on AIL pushing to write out any quota updates. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
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34625c661b
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@ -879,100 +879,6 @@ xfs_qm_dqdetach(
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}
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}
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int
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xfs_qm_sync(
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struct xfs_mount *mp,
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int flags)
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{
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struct xfs_quotainfo *q = mp->m_quotainfo;
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int recl, restarts;
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struct xfs_dquot *dqp;
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int error;
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if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
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return 0;
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restarts = 0;
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again:
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mutex_lock(&q->qi_dqlist_lock);
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/*
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* dqpurge_all() also takes the mplist lock and iterate thru all dquots
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* in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared
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* when we have the mplist lock, we know that dquots will be consistent
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* as long as we have it locked.
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*/
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if (!XFS_IS_QUOTA_ON(mp)) {
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mutex_unlock(&q->qi_dqlist_lock);
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return 0;
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}
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ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
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list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
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/*
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* If this is vfs_sync calling, then skip the dquots that
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* don't 'seem' to be dirty. ie. don't acquire dqlock.
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* This is very similar to what xfs_sync does with inodes.
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*/
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if (flags & SYNC_TRYLOCK) {
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if (!XFS_DQ_IS_DIRTY(dqp))
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continue;
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if (!xfs_qm_dqlock_nowait(dqp))
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continue;
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} else {
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xfs_dqlock(dqp);
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}
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/*
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* Now, find out for sure if this dquot is dirty or not.
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*/
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if (! XFS_DQ_IS_DIRTY(dqp)) {
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xfs_dqunlock(dqp);
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continue;
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}
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/* XXX a sentinel would be better */
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recl = q->qi_dqreclaims;
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if (!xfs_dqflock_nowait(dqp)) {
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if (flags & SYNC_TRYLOCK) {
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xfs_dqunlock(dqp);
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continue;
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}
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/*
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* If we can't grab the flush lock then if the caller
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* really wanted us to give this our best shot, so
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* see if we can give a push to the buffer before we wait
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* on the flush lock. At this point, we know that
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* even though the dquot is being flushed,
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* it has (new) dirty data.
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*/
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xfs_qm_dqflock_pushbuf_wait(dqp);
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}
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/*
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* Let go of the mplist lock. We don't want to hold it
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* across a disk write
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*/
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mutex_unlock(&q->qi_dqlist_lock);
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error = xfs_qm_dqflush(dqp, flags);
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xfs_dqunlock(dqp);
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if (error && XFS_FORCED_SHUTDOWN(mp))
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return 0; /* Need to prevent umount failure */
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else if (error)
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return error;
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mutex_lock(&q->qi_dqlist_lock);
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if (recl != q->qi_dqreclaims) {
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if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS)
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break;
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mutex_unlock(&q->qi_dqlist_lock);
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goto again;
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}
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}
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mutex_unlock(&q->qi_dqlist_lock);
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return 0;
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}
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/*
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* The hash chains and the mplist use the same xfs_dqhash structure as
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* their list head, but we can take the mplist qh_lock and one of the
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@ -32,12 +32,6 @@ extern struct xfs_qm *xfs_Gqm;
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extern kmem_zone_t *qm_dqzone;
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extern kmem_zone_t *qm_dqtrxzone;
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/*
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* Used in xfs_qm_sync called by xfs_sync to count the max times that it can
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* iterate over the mountpt's dquot list in one call.
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*/
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#define XFS_QM_SYNC_MAX_RESTARTS 7
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/*
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* Ditto, for xfs_qm_dqreclaim_one.
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*/
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@ -326,7 +326,6 @@ extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
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extern void xfs_qm_dqdetach(struct xfs_inode *);
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extern void xfs_qm_dqrele(struct xfs_dquot *);
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extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
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extern int xfs_qm_sync(struct xfs_mount *, int);
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extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
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extern void xfs_qm_mount_quotas(struct xfs_mount *);
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extern void xfs_qm_unmount(struct xfs_mount *);
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@ -366,10 +365,6 @@ static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
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#define xfs_qm_dqdetach(ip)
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#define xfs_qm_dqrele(d)
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#define xfs_qm_statvfs(ip, s)
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static inline int xfs_qm_sync(struct xfs_mount *mp, int flags)
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{
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return 0;
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}
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#define xfs_qm_newmount(mp, a, b) (0)
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#define xfs_qm_mount_quotas(mp)
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#define xfs_qm_unmount(mp)
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@ -1025,17 +1025,10 @@ xfs_fs_sync_fs(
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int error;
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/*
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* Not much we can do for the first async pass. Writing out the
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* superblock would be counter-productive as we are going to redirty
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* when writing out other data and metadata (and writing out a single
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* block is quite fast anyway).
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*
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* Try to asynchronously kick off quota syncing at least.
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* Doing anything during the async pass would be counterproductive.
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*/
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if (!wait) {
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xfs_qm_sync(mp, SYNC_TRYLOCK);
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if (!wait)
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return 0;
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}
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error = xfs_quiesce_data(mp);
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if (error)
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@ -359,10 +359,7 @@ xfs_quiesce_data(
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{
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int error, error2 = 0;
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xfs_qm_sync(mp, SYNC_TRYLOCK);
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xfs_qm_sync(mp, SYNC_WAIT);
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/* force out the newly dirtied log buffers */
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/* force out the log */
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xfs_log_force(mp, XFS_LOG_SYNC);
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/* write superblock and hoover up shutdown errors */
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@ -470,7 +467,6 @@ xfs_sync_worker(
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error = xfs_fs_log_dummy(mp);
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else
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xfs_log_force(mp, 0);
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error = xfs_qm_sync(mp, SYNC_TRYLOCK);
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/* start pushing all the metadata that is currently dirty */
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xfs_ail_push_all(mp->m_ail);
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