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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-19 11:40:13 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-19 11:40:13 -0700
commita78feb7c8a0687913f9869c05811054595a42a76 (patch)
treeb89ceba977943e58475e28cf6acd6377a8d84320
parent91fe7d7cdd7ebb0b6c01f201a23824ab5b466ada (diff)
parentb394e43e995d08821588a22561c6a71a63b4ff27 (diff)
downloadlinux-linaro-a78feb7c8a0687913f9869c05811054595a42a76.tar.gz
Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6
* 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6: [XFS] Avoid replaying inode buffer initialisation log items if on-disk version is newer. [XFS] Ensure file size updates have been completed before writing inode to disk. [XFS] On-demand reaping of the MRU cache
-rw-r--r--fs/xfs/linux-2.6/xfs_aops.c1
-rw-r--r--fs/xfs/linux-2.6/xfs_super.c4
-rw-r--r--fs/xfs/xfs_buf_item.h5
-rw-r--r--fs/xfs/xfs_filestream.c3
-rw-r--r--fs/xfs/xfs_log_recover.c51
-rw-r--r--fs/xfs/xfs_mru_cache.c72
-rw-r--r--fs/xfs/xfs_mru_cache.h6
-rw-r--r--fs/xfs/xfs_trans_buf.c1
-rw-r--r--fs/xfs/xfs_vnodeops.c20
9 files changed, 101 insertions, 62 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index d9c40fe6419..5f152f60d74 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -181,6 +181,7 @@ xfs_setfilesize(
ip->i_d.di_size = isize;
ip->i_update_core = 1;
ip->i_update_size = 1;
+ mark_inode_dirty_sync(vn_to_inode(ioend->io_vnode));
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 4528f9a3f30..491d1f4f202 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -415,8 +415,10 @@ xfs_fs_write_inode(
if (vp) {
vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
- if (sync)
+ if (sync) {
+ filemap_fdatawait(inode->i_mapping);
flags |= FLUSH_SYNC;
+ }
error = bhv_vop_iflush(vp, flags);
if (error == EAGAIN)
error = sync? bhv_vop_iflush(vp, flags | FLUSH_LOG) : 0;
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index d7e13614306..fa25b7dcc6c 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -52,6 +52,11 @@ typedef struct xfs_buf_log_format_t {
#define XFS_BLI_UDQUOT_BUF 0x4
#define XFS_BLI_PDQUOT_BUF 0x8
#define XFS_BLI_GDQUOT_BUF 0x10
+/*
+ * This flag indicates that the buffer contains newly allocated
+ * inodes.
+ */
+#define XFS_BLI_INODE_NEW_BUF 0x20
#define XFS_BLI_CHUNK 128
#define XFS_BLI_SHIFT 7
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c
index ce2278611bb..16f8e175167 100644
--- a/fs/xfs/xfs_filestream.c
+++ b/fs/xfs/xfs_filestream.c
@@ -467,8 +467,7 @@ void
xfs_filestream_flush(
xfs_mount_t *mp)
{
- /* point in time flush, so keep the reaper running */
- xfs_mru_cache_flush(mp->m_filestream, 1);
+ xfs_mru_cache_flush(mp->m_filestream);
}
/*
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 8ae6e8e5f3d..dacb19739cc 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1874,6 +1874,7 @@ xlog_recover_do_inode_buffer(
/*ARGSUSED*/
STATIC void
xlog_recover_do_reg_buffer(
+ xfs_mount_t *mp,
xlog_recover_item_t *item,
xfs_buf_t *bp,
xfs_buf_log_format_t *buf_f)
@@ -1884,6 +1885,50 @@ xlog_recover_do_reg_buffer(
unsigned int *data_map = NULL;
unsigned int map_size = 0;
int error;
+ int stale_buf = 1;
+
+ /*
+ * Scan through the on-disk inode buffer and attempt to
+ * determine if it has been written to since it was logged.
+ *
+ * - If any of the magic numbers are incorrect then the buffer is stale
+ * - If any of the modes are non-zero then the buffer is not stale
+ * - If all of the modes are zero and at least one of the generation
+ * counts is non-zero then the buffer is stale
+ *
+ * If the end result is a stale buffer then the log buffer is replayed
+ * otherwise it is skipped.
+ *
+ * This heuristic is not perfect. It can be improved by scanning the
+ * entire inode chunk for evidence that any of the inode clusters have
+ * been updated. To fix this problem completely we will need a major
+ * architectural change to the logging system.
+ */
+ if (buf_f->blf_flags & XFS_BLI_INODE_NEW_BUF) {
+ xfs_dinode_t *dip;
+ int inodes_per_buf;
+ int mode_count = 0;
+ int gen_count = 0;
+
+ stale_buf = 0;
+ inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog;
+ for (i = 0; i < inodes_per_buf; i++) {
+ dip = (xfs_dinode_t *)xfs_buf_offset(bp,
+ i * mp->m_sb.sb_inodesize);
+ if (be16_to_cpu(dip->di_core.di_magic) !=
+ XFS_DINODE_MAGIC) {
+ stale_buf = 1;
+ break;
+ }
+ if (be16_to_cpu(dip->di_core.di_mode))
+ mode_count++;
+ if (be16_to_cpu(dip->di_core.di_gen))
+ gen_count++;
+ }
+
+ if (!mode_count && gen_count)
+ stale_buf = 1;
+ }
switch (buf_f->blf_type) {
case XFS_LI_BUF:
@@ -1917,7 +1962,7 @@ xlog_recover_do_reg_buffer(
-1, 0, XFS_QMOPT_DOWARN,
"dquot_buf_recover");
}
- if (!error)
+ if (!error && stale_buf)
memcpy(xfs_buf_offset(bp,
(uint)bit << XFS_BLI_SHIFT), /* dest */
item->ri_buf[i].i_addr, /* source */
@@ -2089,7 +2134,7 @@ xlog_recover_do_dquot_buffer(
if (log->l_quotaoffs_flag & type)
return;
- xlog_recover_do_reg_buffer(item, bp, buf_f);
+ xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
}
/*
@@ -2190,7 +2235,7 @@ xlog_recover_do_buffer_trans(
(XFS_BLI_UDQUOT_BUF|XFS_BLI_PDQUOT_BUF|XFS_BLI_GDQUOT_BUF)) {
xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f);
} else {
- xlog_recover_do_reg_buffer(item, bp, buf_f);
+ xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
}
if (error)
return XFS_ERROR(error);
diff --git a/fs/xfs/xfs_mru_cache.c b/fs/xfs/xfs_mru_cache.c
index 7deb9e3cbbd..e0b358c1c53 100644
--- a/fs/xfs/xfs_mru_cache.c
+++ b/fs/xfs/xfs_mru_cache.c
@@ -206,8 +206,11 @@ _xfs_mru_cache_list_insert(
*/
if (!_xfs_mru_cache_migrate(mru, now)) {
mru->time_zero = now;
- if (!mru->next_reap)
- mru->next_reap = mru->grp_count * mru->grp_time;
+ if (!mru->queued) {
+ mru->queued = 1;
+ queue_delayed_work(xfs_mru_reap_wq, &mru->work,
+ mru->grp_count * mru->grp_time);
+ }
} else {
grp = (now - mru->time_zero) / mru->grp_time;
grp = (mru->lru_grp + grp) % mru->grp_count;
@@ -271,29 +274,26 @@ _xfs_mru_cache_reap(
struct work_struct *work)
{
xfs_mru_cache_t *mru = container_of(work, xfs_mru_cache_t, work.work);
- unsigned long now;
+ unsigned long now, next;
ASSERT(mru && mru->lists);
if (!mru || !mru->lists)
return;
mutex_spinlock(&mru->lock);
- now = jiffies;
- if (mru->reap_all ||
- (mru->next_reap && time_after(now, mru->next_reap))) {
- if (mru->reap_all)
- now += mru->grp_count * mru->grp_time * 2;
- mru->next_reap = _xfs_mru_cache_migrate(mru, now);
- _xfs_mru_cache_clear_reap_list(mru);
+ next = _xfs_mru_cache_migrate(mru, jiffies);
+ _xfs_mru_cache_clear_reap_list(mru);
+
+ mru->queued = next;
+ if ((mru->queued > 0)) {
+ now = jiffies;
+ if (next <= now)
+ next = 0;
+ else
+ next -= now;
+ queue_delayed_work(xfs_mru_reap_wq, &mru->work, next);
}
- /*
- * the process that triggered the reap_all is responsible
- * for restating the periodic reap if it is required.
- */
- if (!mru->reap_all)
- queue_delayed_work(xfs_mru_reap_wq, &mru->work, mru->grp_time);
- mru->reap_all = 0;
mutex_spinunlock(&mru->lock, 0);
}
@@ -352,7 +352,7 @@ xfs_mru_cache_create(
/* An extra list is needed to avoid reaping up to a grp_time early. */
mru->grp_count = grp_count + 1;
- mru->lists = kmem_alloc(mru->grp_count * sizeof(*mru->lists), KM_SLEEP);
+ mru->lists = kmem_zalloc(mru->grp_count * sizeof(*mru->lists), KM_SLEEP);
if (!mru->lists) {
err = ENOMEM;
@@ -374,11 +374,6 @@ xfs_mru_cache_create(
mru->grp_time = grp_time;
mru->free_func = free_func;
- /* start up the reaper event */
- mru->next_reap = 0;
- mru->reap_all = 0;
- queue_delayed_work(xfs_mru_reap_wq, &mru->work, mru->grp_time);
-
*mrup = mru;
exit:
@@ -394,35 +389,25 @@ exit:
* Call xfs_mru_cache_flush() to flush out all cached entries, calling their
* free functions as they're deleted. When this function returns, the caller is
* guaranteed that all the free functions for all the elements have finished
- * executing.
- *
- * While we are flushing, we stop the periodic reaper event from triggering.
- * Normally, we want to restart this periodic event, but if we are shutting
- * down the cache we do not want it restarted. hence the restart parameter
- * where 0 = do not restart reaper and 1 = restart reaper.
+ * executing and the reaper is not running.
*/
void
xfs_mru_cache_flush(
- xfs_mru_cache_t *mru,
- int restart)
+ xfs_mru_cache_t *mru)
{
if (!mru || !mru->lists)
return;
- cancel_rearming_delayed_workqueue(xfs_mru_reap_wq, &mru->work);
-
mutex_spinlock(&mru->lock);
- mru->reap_all = 1;
- mutex_spinunlock(&mru->lock, 0);
+ if (mru->queued) {
+ mutex_spinunlock(&mru->lock, 0);
+ cancel_rearming_delayed_workqueue(xfs_mru_reap_wq, &mru->work);
+ mutex_spinlock(&mru->lock);
+ }
- queue_work(xfs_mru_reap_wq, &mru->work.work);
- flush_workqueue(xfs_mru_reap_wq);
+ _xfs_mru_cache_migrate(mru, jiffies + mru->grp_count * mru->grp_time);
+ _xfs_mru_cache_clear_reap_list(mru);
- mutex_spinlock(&mru->lock);
- WARN_ON_ONCE(mru->reap_all != 0);
- mru->reap_all = 0;
- if (restart)
- queue_delayed_work(xfs_mru_reap_wq, &mru->work, mru->grp_time);
mutex_spinunlock(&mru->lock, 0);
}
@@ -433,8 +418,7 @@ xfs_mru_cache_destroy(
if (!mru || !mru->lists)
return;
- /* we don't want the reaper to restart here */
- xfs_mru_cache_flush(mru, 0);
+ xfs_mru_cache_flush(mru);
kmem_free(mru->lists, mru->grp_count * sizeof(*mru->lists));
kmem_free(mru, sizeof(*mru));
diff --git a/fs/xfs/xfs_mru_cache.h b/fs/xfs/xfs_mru_cache.h
index 624fd10ee8e..dd58ea1bbeb 100644
--- a/fs/xfs/xfs_mru_cache.h
+++ b/fs/xfs/xfs_mru_cache.h
@@ -32,11 +32,9 @@ typedef struct xfs_mru_cache
unsigned int grp_time; /* Time period spanned by grps. */
unsigned int lru_grp; /* Group containing time zero. */
unsigned long time_zero; /* Time first element was added. */
- unsigned long next_reap; /* Time that the reaper should
- next do something. */
- unsigned int reap_all; /* if set, reap all lists */
xfs_mru_cache_free_func_t free_func; /* Function pointer for freeing. */
struct delayed_work work; /* Workqueue data for reaping. */
+ unsigned int queued; /* work has been queued */
} xfs_mru_cache_t;
int xfs_mru_cache_init(void);
@@ -44,7 +42,7 @@ void xfs_mru_cache_uninit(void);
int xfs_mru_cache_create(struct xfs_mru_cache **mrup, unsigned int lifetime_ms,
unsigned int grp_count,
xfs_mru_cache_free_func_t free_func);
-void xfs_mru_cache_flush(xfs_mru_cache_t *mru, int restart);
+void xfs_mru_cache_flush(xfs_mru_cache_t *mru);
void xfs_mru_cache_destroy(struct xfs_mru_cache *mru);
int xfs_mru_cache_insert(struct xfs_mru_cache *mru, unsigned long key,
void *value);
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 60b6b898022..95fff6872a2 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -966,6 +966,7 @@ xfs_trans_inode_alloc_buf(
ASSERT(atomic_read(&bip->bli_refcount) > 0);
bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;
+ bip->bli_format.blf_flags |= XFS_BLI_INODE_NEW_BUF;
}
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 1a5ad8cd97b..60345922990 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -1082,6 +1082,9 @@ xfs_fsync(
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
return XFS_ERROR(EIO);
+ if (flag & FSYNC_DATA)
+ filemap_fdatawait(vn_to_inode(XFS_ITOV(ip))->i_mapping);
+
/*
* We always need to make sure that the required inode state
* is safe on disk. The vnode might be clean but because
@@ -3769,12 +3772,16 @@ xfs_inode_flush(
sync_lsn = log->l_last_sync_lsn;
GRANT_UNLOCK(log, s);
- if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) <= 0))
- return 0;
+ if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) > 0)) {
+ if (flags & FLUSH_SYNC)
+ log_flags |= XFS_LOG_SYNC;
+ error = xfs_log_force(mp, iip->ili_last_lsn, log_flags);
+ if (error)
+ return error;
+ }
- if (flags & FLUSH_SYNC)
- log_flags |= XFS_LOG_SYNC;
- return xfs_log_force(mp, iip->ili_last_lsn, log_flags);
+ if (ip->i_update_core == 0)
+ return 0;
}
}
@@ -3788,9 +3795,6 @@ xfs_inode_flush(
if (flags & FLUSH_INODE) {
int flush_flags;
- if (xfs_ipincount(ip))
- return EAGAIN;
-
if (flags & FLUSH_SYNC) {
xfs_ilock(ip, XFS_ILOCK_SHARED);
xfs_iflock(ip);