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FS-Cache: Annotate slow-work runqueue proc lines for FS-Cache work items

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Annotate slow-work runqueue proc lines for FS-Cache work items.  Objects
include the object ID and the state.  Operations include the object ID, the
operation ID and the operation type and state.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2009-11-19 18:11:01 +00:00
parent 3bde31a4ac
commit 440f0affe2
4 changed files with 103 additions and 6 deletions
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29
fs/fscache/operation.c
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@@ -13,6 +13,7 @@
#define FSCACHE_DEBUG_LEVEL OPERATION
#include <linux/module.h>
#include <linux/seq_file.h>
#include "internal.h"
atomic_t fscache_op_debug_id;
@@ -31,6 +32,8 @@ void fscache_enqueue_operation(struct fscache_operation *op)
_enter("{OBJ%x OP%x,%u}",
op->object->debug_id, op->debug_id, atomic_read(&op->usage));
fscache_set_op_state(op, "EnQ");
ASSERT(op->processor != NULL);
ASSERTCMP(op->object->state, >=, FSCACHE_OBJECT_AVAILABLE);
ASSERTCMP(atomic_read(&op->usage), >, 0);
@@ -67,6 +70,8 @@ EXPORT_SYMBOL(fscache_enqueue_operation);
static void fscache_run_op(struct fscache_object *object,
struct fscache_operation *op)
{
fscache_set_op_state(op, "Run");
object->n_in_progress++;
if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
@@ -87,6 +92,8 @@ int fscache_submit_exclusive_op(struct fscache_object *object,
_enter("{OBJ%x OP%x},", object->debug_id, op->debug_id);
fscache_set_op_state(op, "SubmitX");
spin_lock(&object->lock);
ASSERTCMP(object->n_ops, >=, object->n_in_progress);
ASSERTCMP(object->n_ops, >=, object->n_exclusive);
@@ -190,6 +197,8 @@ int fscache_submit_op(struct fscache_object *object,
ASSERTCMP(atomic_read(&op->usage), >, 0);
fscache_set_op_state(op, "Submit");
spin_lock(&object->lock);
ASSERTCMP(object->n_ops, >=, object->n_in_progress);
ASSERTCMP(object->n_ops, >=, object->n_exclusive);
@@ -298,6 +307,8 @@ void fscache_put_operation(struct fscache_operation *op)
if (!atomic_dec_and_test(&op->usage))
return;
fscache_set_op_state(op, "Put");
_debug("PUT OP");
if (test_and_set_bit(FSCACHE_OP_DEAD, &op->flags))
BUG();
@@ -452,9 +463,27 @@ static void fscache_op_execute(struct slow_work *work)
_leave("");
}
/*
* describe an operation for slow-work debugging
*/
#ifdef CONFIG_SLOW_WORK_PROC
static void fscache_op_desc(struct slow_work *work, struct seq_file *m)
{
struct fscache_operation *op =
container_of(work, struct fscache_operation, slow_work);
seq_printf(m, "FSC: OBJ%x OP%x: %s/%s fl=%lx",
op->object->debug_id, op->debug_id,
op->name, op->state, op->flags);
}
#endif
const struct slow_work_ops fscache_op_slow_work_ops = {
.owner = THIS_MODULE,
.get_ref = fscache_op_get_ref,
.put_ref = fscache_op_put_ref,
.execute = fscache_op_execute,
#ifdef CONFIG_SLOW_WORK_PROC
.desc = fscache_op_desc,
#endif
};