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Add a tracepoint for block request remapping
[safe/jmp/linux-2.6]
/
block
/
elevator.c
diff --git
a/block/elevator.c
b/block/elevator.c
index
bd78f69
..
1975b61
100644
(file)
--- a/
block/elevator.c
+++ b/
block/elevator.c
@@
-33,17
+33,16
@@
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/blktrace_api.h>
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/blktrace_api.h>
-#include <trace/block.h>
#include <linux/hash.h>
#include <linux/uaccess.h>
#include <linux/hash.h>
#include <linux/uaccess.h>
+#include <trace/events/block.h>
+
#include "blk.h"
static DEFINE_SPINLOCK(elv_list_lock);
static LIST_HEAD(elv_list);
#include "blk.h"
static DEFINE_SPINLOCK(elv_list_lock);
static LIST_HEAD(elv_list);
-DEFINE_TRACE(block_rq_abort);
-
/*
* Merge hash stuff.
*/
/*
* Merge hash stuff.
*/
@@
-54,9
+53,6
@@
static const int elv_hash_shift = 6;
#define ELV_HASH_ENTRIES (1 << elv_hash_shift)
#define rq_hash_key(rq) (blk_rq_pos(rq) + blk_rq_sectors(rq))
#define ELV_HASH_ENTRIES (1 << elv_hash_shift)
#define rq_hash_key(rq) (blk_rq_pos(rq) + blk_rq_sectors(rq))
-DEFINE_TRACE(block_rq_insert);
-DEFINE_TRACE(block_rq_issue);
-
/*
* Query io scheduler to see if the current process issuing bio may be
* merged with rq.
/*
* Query io scheduler to see if the current process issuing bio may be
* merged with rq.
@@
-83,7
+79,8
@@
int elv_rq_merge_ok(struct request *rq, struct bio *bio)
/*
* Don't merge file system requests and discard requests
*/
/*
* Don't merge file system requests and discard requests
*/
- if (bio_discard(bio) != bio_discard(rq->bio))
+ if (bio_rw_flagged(bio, BIO_RW_DISCARD) !=
+ bio_rw_flagged(rq->bio, BIO_RW_DISCARD))
return 0;
/*
return 0;
/*
@@
-813,6
+810,11
@@
void elv_abort_queue(struct request_queue *q)
rq = list_entry_rq(q->queue_head.next);
rq->cmd_flags |= REQ_QUIET;
trace_block_rq_abort(q, rq);
rq = list_entry_rq(q->queue_head.next);
rq->cmd_flags |= REQ_QUIET;
trace_block_rq_abort(q, rq);
+ /*
+ * Mark this request as started so we don't trigger
+ * any debug logic in the end I/O path.
+ */
+ blk_start_request(rq);
__blk_end_request_all(rq, -EIO);
}
}
__blk_end_request_all(rq, -EIO);
}
}