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author | David Howells <dhowells@redhat.com> | 2018-04-04 15:41:27 +0300 |
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committer | David Howells <dhowells@redhat.com> | 2018-04-04 15:41:27 +0300 |
commit | 08c2e3d087840cd1e7141b62d92f3dc897147984 (patch) | |
tree | f5b5ad5c4732cc5cc4f5244f8153ad134a71d979 /fs/fscache/operation.c | |
parent | a18feb55769b705a44c4107786c4045eae2e87b6 (diff) | |
download | linux-08c2e3d087840cd1e7141b62d92f3dc897147984.tar.xz |
fscache: Add more tracepoints
Add more tracepoints to fscache, including:
(*) fscache_page - Tracks netfs pages known to fscache.
(*) fscache_check_page - Tracks the netfs querying whether a page is
pending storage.
(*) fscache_wake_cookie - Tracks cookies being woken up after a page
completes/aborts storage in the cache.
(*) fscache_op - Tracks operations being initialised.
(*) fscache_wrote_page - Tracks return of the backend write_page op.
(*) fscache_gang_lookup - Tracks lookup of pages to be stored in the write
operation.
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/fscache/operation.c')
-rw-r--r-- | fs/fscache/operation.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c index de67745e1cd7..7a071e1e952d 100644 --- a/fs/fscache/operation.c +++ b/fs/fscache/operation.c @@ -32,7 +32,8 @@ static void fscache_operation_dummy_cancel(struct fscache_operation *op) * Do basic initialisation of an operation. The caller must still set flags, * object and processor if needed. */ -void fscache_operation_init(struct fscache_operation *op, +void fscache_operation_init(struct fscache_cookie *cookie, + struct fscache_operation *op, fscache_operation_processor_t processor, fscache_operation_cancel_t cancel, fscache_operation_release_t release) @@ -46,6 +47,7 @@ void fscache_operation_init(struct fscache_operation *op, op->release = release; INIT_LIST_HEAD(&op->pend_link); fscache_stat(&fscache_n_op_initialised); + trace_fscache_op(cookie, op, fscache_op_init); } EXPORT_SYMBOL(fscache_operation_init); @@ -59,6 +61,8 @@ EXPORT_SYMBOL(fscache_operation_init); */ void fscache_enqueue_operation(struct fscache_operation *op) { + struct fscache_cookie *cookie = op->object->cookie; + _enter("{OBJ%x OP%x,%u}", op->object->debug_id, op->debug_id, atomic_read(&op->usage)); @@ -71,12 +75,14 @@ void fscache_enqueue_operation(struct fscache_operation *op) fscache_stat(&fscache_n_op_enqueue); switch (op->flags & FSCACHE_OP_TYPE) { case FSCACHE_OP_ASYNC: + trace_fscache_op(cookie, op, fscache_op_enqueue_async); _debug("queue async"); atomic_inc(&op->usage); if (!queue_work(fscache_op_wq, &op->work)) fscache_put_operation(op); break; case FSCACHE_OP_MYTHREAD: + trace_fscache_op(cookie, op, fscache_op_enqueue_mythread); _debug("queue for caller's attention"); break; default: @@ -101,6 +107,8 @@ static void fscache_run_op(struct fscache_object *object, wake_up_bit(&op->flags, FSCACHE_OP_WAITING); if (op->processor) fscache_enqueue_operation(op); + else + trace_fscache_op(object->cookie, op, fscache_op_run); fscache_stat(&fscache_n_op_run); } @@ -155,6 +163,8 @@ int fscache_submit_exclusive_op(struct fscache_object *object, _enter("{OBJ%x OP%x},", object->debug_id, op->debug_id); + trace_fscache_op(object->cookie, op, fscache_op_submit_ex); + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED); ASSERTCMP(atomic_read(&op->usage), >, 0); @@ -240,6 +250,8 @@ int fscache_submit_op(struct fscache_object *object, _enter("{OBJ%x OP%x},{%u}", object->debug_id, op->debug_id, atomic_read(&op->usage)); + trace_fscache_op(object->cookie, op, fscache_op_submit); + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED); ASSERTCMP(atomic_read(&op->usage), >, 0); @@ -357,6 +369,8 @@ int fscache_cancel_op(struct fscache_operation *op, _enter("OBJ%x OP%x}", op->object->debug_id, op->debug_id); + trace_fscache_op(object->cookie, op, fscache_op_cancel); + ASSERTCMP(op->state, >=, FSCACHE_OP_ST_PENDING); ASSERTCMP(op->state, !=, FSCACHE_OP_ST_CANCELLED); ASSERTCMP(atomic_read(&op->usage), >, 0); @@ -419,6 +433,8 @@ void fscache_cancel_all_ops(struct fscache_object *object) fscache_stat(&fscache_n_op_cancelled); list_del_init(&op->pend_link); + trace_fscache_op(object->cookie, op, fscache_op_cancel_all); + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING); op->cancel(op); op->state = FSCACHE_OP_ST_CANCELLED; @@ -454,9 +470,11 @@ void fscache_op_complete(struct fscache_operation *op, bool cancelled) spin_lock(&object->lock); if (!cancelled) { + trace_fscache_op(object->cookie, op, fscache_op_completed); op->state = FSCACHE_OP_ST_COMPLETE; } else { op->cancel(op); + trace_fscache_op(object->cookie, op, fscache_op_cancelled); op->state = FSCACHE_OP_ST_CANCELLED; } @@ -488,6 +506,8 @@ void fscache_put_operation(struct fscache_operation *op) if (!atomic_dec_and_test(&op->usage)) return; + trace_fscache_op(op->object->cookie, op, fscache_op_put); + _debug("PUT OP"); ASSERTIFCMP(op->state != FSCACHE_OP_ST_INITIALISED && op->state != FSCACHE_OP_ST_COMPLETE, @@ -563,6 +583,8 @@ void fscache_operation_gc(struct work_struct *work) spin_unlock(&cache->op_gc_list_lock); object = op->object; + trace_fscache_op(object->cookie, op, fscache_op_gc); + spin_lock(&object->lock); _debug("GC DEFERRED REL OBJ%x OP%x", @@ -601,6 +623,8 @@ void fscache_op_work_func(struct work_struct *work) _enter("{OBJ%x OP%x,%d}", op->object->debug_id, op->debug_id, atomic_read(&op->usage)); + trace_fscache_op(op->object->cookie, op, fscache_op_work); + ASSERT(op->processor != NULL); start = jiffies; op->processor(op); |