xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

xfs: add tracepoints for the deferred ops mechanism

Browse Source 
Add tracepoints for the internals of the deferred ops mechanism
and tracepoint classes for clients of the dops, to make debugging
easier.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong
2016-08-03 11:13:02 +10:00
committed by Dave Chinner
parent 4e0cc29b91
commit 3cd48abcc1
3 changed files with 218 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
fs/xfs/libxfs/xfs_defer.c
View File

@@ -159,6 +159,7 @@ xfs_defer_intake_work(
struct xfs_defer_pending *dfp;
list_for_each_entry(dfp, &dop->dop_intake, dfp_list) {
trace_xfs_defer_intake_work(tp->t_mountp, dfp);
dfp->dfp_intent = dfp->dfp_type->create_intent(tp,
dfp->dfp_count);
list_sort(tp->t_mountp, &dfp->dfp_work,
@@ -179,6 +180,7 @@ xfs_defer_trans_abort(
{
struct xfs_defer_pending *dfp;
trace_xfs_defer_trans_abort(tp->t_mountp, dop);
/*
* If the transaction was committed, drop the intent reference
* since we're bailing out of here. The other reference is
@@ -191,6 +193,7 @@ xfs_defer_trans_abort(
/* Abort intent items. */
list_for_each_entry(dfp, &dop->dop_pending, dfp_list) {
trace_xfs_defer_pending_abort(tp->t_mountp, dfp);
if (dfp->dfp_committed)
dfp->dfp_type->abort_intent(dfp->dfp_intent);
}
@@ -217,9 +220,12 @@ xfs_defer_trans_roll(
xfs_trans_log_inode(*tp, dop->dop_inodes[i], XFS_ILOG_CORE);
}
trace_xfs_defer_trans_roll((*tp)->t_mountp, dop);
/* Roll the transaction. */
error = xfs_trans_roll(tp, ip);
if (error) {
trace_xfs_defer_trans_roll_error((*tp)->t_mountp, dop, error);
xfs_defer_trans_abort(*tp, dop, error);
return error;
}
@@ -291,6 +297,8 @@ xfs_defer_finish(
ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
trace_xfs_defer_finish((*tp)->t_mountp, dop);
/* Until we run out of pending work to finish... */
while (xfs_defer_has_unfinished_work(dop)) {
/* Log intents for work items sitting in the intake. */
@@ -305,12 +313,14 @@ xfs_defer_finish(
list_for_each_entry_reverse(dfp, &dop->dop_pending, dfp_list) {
if (dfp->dfp_committed)
break;
trace_xfs_defer_pending_commit((*tp)->t_mountp, dfp);
dfp->dfp_committed = true;
}
/* Log an intent-done item for the first pending item. */
dfp = list_first_entry(&dop->dop_pending,
struct xfs_defer_pending, dfp_list);
trace_xfs_defer_pending_finish((*tp)->t_mountp, dfp);
done_item = dfp->dfp_type->create_done(*tp, dfp->dfp_intent,
dfp->dfp_count);
cleanup_fn = dfp->dfp_type->finish_cleanup;
@@ -343,6 +353,10 @@ xfs_defer_finish(
}
out:
if (error)
trace_xfs_defer_finish_error((*tp)->t_mountp, dop, error);
else
trace_xfs_defer_finish_done((*tp)->t_mountp, dop);
return error;
}
@@ -358,11 +372,14 @@ xfs_defer_cancel(
struct list_head *pwi;
struct list_head *n;
trace_xfs_defer_cancel(NULL, dop);
/*
* Free the pending items. Caller should already have arranged
* for the intent items to be released.
*/
list_for_each_entry_safe(dfp, pli, &dop->dop_intake, dfp_list) {
trace_xfs_defer_intake_cancel(NULL, dfp);
list_del(&dfp->dfp_list);
list_for_each_safe(pwi, n, &dfp->dfp_work) {
list_del(pwi);
@@ -373,6 +390,7 @@ xfs_defer_cancel(
kmem_free(dfp);
}
list_for_each_entry_safe(dfp, pli, &dop->dop_pending, dfp_list) {
trace_xfs_defer_pending_cancel(NULL, dfp);
list_del(&dfp->dfp_list);
list_for_each_safe(pwi, n, &dfp->dfp_work) {
list_del(pwi);
@@ -441,4 +459,5 @@ xfs_defer_init(
*fbp = NULLFSBLOCK;
INIT_LIST_HEAD(&dop->dop_intake);
INIT_LIST_HEAD(&dop->dop_pending);
trace_xfs_defer_init(NULL, dop);
}