mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 19:01:37 +00:00
0a82a8d132
This reverts commit 3a366e614d.
Wanlong Gao reports that it causes a kernel panic on his machine several
minutes after boot. Reverting it removes the panic.
Jens says:
"It's not quite clear why that is yet, so I think we should just revert
the commit for 3.9 final (which I'm assuming is pretty close).
The wifi is crap at the LSF hotel, so sending this email instead of
queueing up a revert and pull request."
Reported-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Requested-by: Jens Axboe <axboe@kernel.dk>
Cc: Tejun Heo <tj@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
646 lines
17 KiB
C
646 lines
17 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM block
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#if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_BLOCK_H
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#include <linux/blktrace_api.h>
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#include <linux/blkdev.h>
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#include <linux/buffer_head.h>
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#include <linux/tracepoint.h>
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#define RWBS_LEN 8
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DECLARE_EVENT_CLASS(block_buffer,
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TP_PROTO(struct buffer_head *bh),
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TP_ARGS(bh),
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TP_STRUCT__entry (
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( size_t, size )
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),
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TP_fast_assign(
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__entry->dev = bh->b_bdev->bd_dev;
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__entry->sector = bh->b_blocknr;
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__entry->size = bh->b_size;
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),
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TP_printk("%d,%d sector=%llu size=%zu",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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(unsigned long long)__entry->sector, __entry->size
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)
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);
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/**
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* block_touch_buffer - mark a buffer accessed
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* @bh: buffer_head being touched
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*
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* Called from touch_buffer().
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*/
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DEFINE_EVENT(block_buffer, block_touch_buffer,
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TP_PROTO(struct buffer_head *bh),
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TP_ARGS(bh)
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);
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/**
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* block_dirty_buffer - mark a buffer dirty
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* @bh: buffer_head being dirtied
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*
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* Called from mark_buffer_dirty().
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*/
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DEFINE_EVENT(block_buffer, block_dirty_buffer,
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TP_PROTO(struct buffer_head *bh),
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TP_ARGS(bh)
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);
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DECLARE_EVENT_CLASS(block_rq_with_error,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__field( int, errors )
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__array( char, rwbs, RWBS_LEN )
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__dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
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),
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TP_fast_assign(
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__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
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__entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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0 : blk_rq_pos(rq);
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__entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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0 : blk_rq_sectors(rq);
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__entry->errors = rq->errors;
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blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
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blk_dump_cmd(__get_str(cmd), rq);
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),
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TP_printk("%d,%d %s (%s) %llu + %u [%d]",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->rwbs, __get_str(cmd),
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->errors)
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);
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/**
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* block_rq_abort - abort block operation request
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* @q: queue containing the block operation request
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* @rq: block IO operation request
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*
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* Called immediately after pending block IO operation request @rq in
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* queue @q is aborted. The fields in the operation request @rq
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* can be examined to determine which device and sectors the pending
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* operation would access.
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*/
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DEFINE_EVENT(block_rq_with_error, block_rq_abort,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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);
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/**
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* block_rq_requeue - place block IO request back on a queue
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* @q: queue holding operation
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* @rq: block IO operation request
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*
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* The block operation request @rq is being placed back into queue
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* @q. For some reason the request was not completed and needs to be
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* put back in the queue.
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*/
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DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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);
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/**
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* block_rq_complete - block IO operation completed by device driver
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* @q: queue containing the block operation request
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* @rq: block operations request
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*
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* The block_rq_complete tracepoint event indicates that some portion
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* of operation request has been completed by the device driver. If
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* the @rq->bio is %NULL, then there is absolutely no additional work to
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* do for the request. If @rq->bio is non-NULL then there is
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* additional work required to complete the request.
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*/
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DEFINE_EVENT(block_rq_with_error, block_rq_complete,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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);
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DECLARE_EVENT_CLASS(block_rq,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__field( unsigned int, bytes )
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__array( char, rwbs, RWBS_LEN )
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__array( char, comm, TASK_COMM_LEN )
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__dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
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),
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TP_fast_assign(
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__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
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__entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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0 : blk_rq_pos(rq);
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__entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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0 : blk_rq_sectors(rq);
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__entry->bytes = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
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blk_rq_bytes(rq) : 0;
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blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
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blk_dump_cmd(__get_str(cmd), rq);
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->rwbs, __entry->bytes, __get_str(cmd),
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->comm)
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);
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/**
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* block_rq_insert - insert block operation request into queue
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* @q: target queue
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* @rq: block IO operation request
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*
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* Called immediately before block operation request @rq is inserted
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* into queue @q. The fields in the operation request @rq struct can
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* be examined to determine which device and sectors the pending
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* operation would access.
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*/
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DEFINE_EVENT(block_rq, block_rq_insert,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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);
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/**
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* block_rq_issue - issue pending block IO request operation to device driver
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* @q: queue holding operation
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* @rq: block IO operation operation request
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*
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* Called when block operation request @rq from queue @q is sent to a
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* device driver for processing.
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*/
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DEFINE_EVENT(block_rq, block_rq_issue,
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TP_PROTO(struct request_queue *q, struct request *rq),
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TP_ARGS(q, rq)
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);
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/**
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* block_bio_bounce - used bounce buffer when processing block operation
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* @q: queue holding the block operation
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* @bio: block operation
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*
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* A bounce buffer was used to handle the block operation @bio in @q.
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* This occurs when hardware limitations prevent a direct transfer of
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* data between the @bio data memory area and the IO device. Use of a
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* bounce buffer requires extra copying of data and decreases
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* performance.
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*/
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TRACE_EVENT(block_bio_bounce,
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TP_PROTO(struct request_queue *q, struct bio *bio),
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TP_ARGS(q, bio),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__array( char, rwbs, RWBS_LEN )
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__array( char, comm, TASK_COMM_LEN )
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev ?
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bio->bi_bdev->bd_dev : 0;
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__entry->sector = bio->bi_sector;
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__entry->nr_sector = bio->bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("%d,%d %s %llu + %u [%s]",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->comm)
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);
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/**
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* block_bio_complete - completed all work on the block operation
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* @q: queue holding the block operation
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* @bio: block operation completed
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* @error: io error value
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*
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* This tracepoint indicates there is no further work to do on this
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* block IO operation @bio.
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*/
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TRACE_EVENT(block_bio_complete,
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TP_PROTO(struct request_queue *q, struct bio *bio, int error),
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TP_ARGS(q, bio, error),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned, nr_sector )
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__field( int, error )
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__array( char, rwbs, RWBS_LEN)
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev->bd_dev;
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__entry->sector = bio->bi_sector;
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__entry->nr_sector = bio->bi_size >> 9;
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__entry->error = error;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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),
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TP_printk("%d,%d %s %llu + %u [%d]",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->error)
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);
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DECLARE_EVENT_CLASS(block_bio_merge,
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TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
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TP_ARGS(q, rq, bio),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__array( char, rwbs, RWBS_LEN )
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__array( char, comm, TASK_COMM_LEN )
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev->bd_dev;
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__entry->sector = bio->bi_sector;
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__entry->nr_sector = bio->bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("%d,%d %s %llu + %u [%s]",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->comm)
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);
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/**
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* block_bio_backmerge - merging block operation to the end of an existing operation
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* @q: queue holding operation
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* @rq: request bio is being merged into
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* @bio: new block operation to merge
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*
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* Merging block request @bio to the end of an existing block request
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* in queue @q.
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*/
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DEFINE_EVENT(block_bio_merge, block_bio_backmerge,
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TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
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TP_ARGS(q, rq, bio)
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);
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/**
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* block_bio_frontmerge - merging block operation to the beginning of an existing operation
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* @q: queue holding operation
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* @rq: request bio is being merged into
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* @bio: new block operation to merge
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*
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* Merging block IO operation @bio to the beginning of an existing block
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* operation in queue @q.
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*/
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DEFINE_EVENT(block_bio_merge, block_bio_frontmerge,
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TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
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TP_ARGS(q, rq, bio)
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);
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/**
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* block_bio_queue - putting new block IO operation in queue
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* @q: queue holding operation
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* @bio: new block operation
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*
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* About to place the block IO operation @bio into queue @q.
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*/
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TRACE_EVENT(block_bio_queue,
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TP_PROTO(struct request_queue *q, struct bio *bio),
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TP_ARGS(q, bio),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__array( char, rwbs, RWBS_LEN )
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__array( char, comm, TASK_COMM_LEN )
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),
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TP_fast_assign(
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__entry->dev = bio->bi_bdev->bd_dev;
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__entry->sector = bio->bi_sector;
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__entry->nr_sector = bio->bi_size >> 9;
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blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("%d,%d %s %llu + %u [%s]",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->comm)
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);
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DECLARE_EVENT_CLASS(block_get_rq,
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TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
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TP_ARGS(q, bio, rw),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, sector )
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__field( unsigned int, nr_sector )
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__array( char, rwbs, RWBS_LEN )
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__array( char, comm, TASK_COMM_LEN )
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),
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TP_fast_assign(
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__entry->dev = bio ? bio->bi_bdev->bd_dev : 0;
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__entry->sector = bio ? bio->bi_sector : 0;
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__entry->nr_sector = bio ? bio->bi_size >> 9 : 0;
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blk_fill_rwbs(__entry->rwbs,
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bio ? bio->bi_rw : 0, __entry->nr_sector);
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("%d,%d %s %llu + %u [%s]",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
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(unsigned long long)__entry->sector,
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__entry->nr_sector, __entry->comm)
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);
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/**
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* block_getrq - get a free request entry in queue for block IO operations
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* @q: queue for operations
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* @bio: pending block IO operation
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* @rw: low bit indicates a read (%0) or a write (%1)
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*
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* A request struct for queue @q has been allocated to handle the
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* block IO operation @bio.
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*/
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DEFINE_EVENT(block_get_rq, block_getrq,
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TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
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TP_ARGS(q, bio, rw)
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);
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/**
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* block_sleeprq - waiting to get a free request entry in queue for block IO operation
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* @q: queue for operation
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* @bio: pending block IO operation
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* @rw: low bit indicates a read (%0) or a write (%1)
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*
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* In the case where a request struct cannot be provided for queue @q
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* the process needs to wait for an request struct to become
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* available. This tracepoint event is generated each time the
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* process goes to sleep waiting for request struct become available.
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*/
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DEFINE_EVENT(block_get_rq, block_sleeprq,
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TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
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TP_ARGS(q, bio, rw)
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);
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/**
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* block_plug - keep operations requests in request queue
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* @q: request queue to plug
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*
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* Plug the request queue @q. Do not allow block operation requests
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* to be sent to the device driver. Instead, accumulate requests in
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* the queue to improve throughput performance of the block device.
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*/
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TRACE_EVENT(block_plug,
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TP_PROTO(struct request_queue *q),
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TP_ARGS(q),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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),
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TP_fast_assign(
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("[%s]", __entry->comm)
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);
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DECLARE_EVENT_CLASS(block_unplug,
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TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
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TP_ARGS(q, depth, explicit),
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TP_STRUCT__entry(
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__field( int, nr_rq )
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__array( char, comm, TASK_COMM_LEN )
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),
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TP_fast_assign(
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__entry->nr_rq = depth;
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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),
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TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
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);
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/**
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* block_unplug - release of operations requests in request queue
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* @q: request queue to unplug
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* @depth: number of requests just added to the queue
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* @explicit: whether this was an explicit unplug, or one from schedule()
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*
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* Unplug request queue @q because device driver is scheduled to work
|
|
* on elements in the request queue.
|
|
*/
|
|
DEFINE_EVENT(block_unplug, block_unplug,
|
|
|
|
TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
|
|
|
|
TP_ARGS(q, depth, explicit)
|
|
);
|
|
|
|
/**
|
|
* block_split - split a single bio struct into two bio structs
|
|
* @q: queue containing the bio
|
|
* @bio: block operation being split
|
|
* @new_sector: The starting sector for the new bio
|
|
*
|
|
* The bio request @bio in request queue @q needs to be split into two
|
|
* bio requests. The newly created @bio request starts at
|
|
* @new_sector. This split may be required due to hardware limitation
|
|
* such as operation crossing device boundaries in a RAID system.
|
|
*/
|
|
TRACE_EVENT(block_split,
|
|
|
|
TP_PROTO(struct request_queue *q, struct bio *bio,
|
|
unsigned int new_sector),
|
|
|
|
TP_ARGS(q, bio, new_sector),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( dev_t, dev )
|
|
__field( sector_t, sector )
|
|
__field( sector_t, new_sector )
|
|
__array( char, rwbs, RWBS_LEN )
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dev = bio->bi_bdev->bd_dev;
|
|
__entry->sector = bio->bi_sector;
|
|
__entry->new_sector = new_sector;
|
|
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
|
|
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
|
|
),
|
|
|
|
TP_printk("%d,%d %s %llu / %llu [%s]",
|
|
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
|
|
(unsigned long long)__entry->sector,
|
|
(unsigned long long)__entry->new_sector,
|
|
__entry->comm)
|
|
);
|
|
|
|
/**
|
|
* block_bio_remap - map request for a logical device to the raw device
|
|
* @q: queue holding the operation
|
|
* @bio: revised operation
|
|
* @dev: device for the operation
|
|
* @from: original sector for the operation
|
|
*
|
|
* An operation for a logical device has been mapped to the
|
|
* raw block device.
|
|
*/
|
|
TRACE_EVENT(block_bio_remap,
|
|
|
|
TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
|
|
sector_t from),
|
|
|
|
TP_ARGS(q, bio, dev, from),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( dev_t, dev )
|
|
__field( sector_t, sector )
|
|
__field( unsigned int, nr_sector )
|
|
__field( dev_t, old_dev )
|
|
__field( sector_t, old_sector )
|
|
__array( char, rwbs, RWBS_LEN)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dev = bio->bi_bdev->bd_dev;
|
|
__entry->sector = bio->bi_sector;
|
|
__entry->nr_sector = bio->bi_size >> 9;
|
|
__entry->old_dev = dev;
|
|
__entry->old_sector = from;
|
|
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
|
|
),
|
|
|
|
TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
|
|
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
|
|
(unsigned long long)__entry->sector,
|
|
__entry->nr_sector,
|
|
MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
|
|
(unsigned long long)__entry->old_sector)
|
|
);
|
|
|
|
/**
|
|
* block_rq_remap - map request for a block operation request
|
|
* @q: queue holding the operation
|
|
* @rq: block IO operation request
|
|
* @dev: device for the operation
|
|
* @from: original sector for the operation
|
|
*
|
|
* The block operation request @rq in @q has been remapped. The block
|
|
* operation request @rq holds the current information and @from hold
|
|
* the original sector.
|
|
*/
|
|
TRACE_EVENT(block_rq_remap,
|
|
|
|
TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,
|
|
sector_t from),
|
|
|
|
TP_ARGS(q, rq, dev, from),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( dev_t, dev )
|
|
__field( sector_t, sector )
|
|
__field( unsigned int, nr_sector )
|
|
__field( dev_t, old_dev )
|
|
__field( sector_t, old_sector )
|
|
__array( char, rwbs, RWBS_LEN)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dev = disk_devt(rq->rq_disk);
|
|
__entry->sector = blk_rq_pos(rq);
|
|
__entry->nr_sector = blk_rq_sectors(rq);
|
|
__entry->old_dev = dev;
|
|
__entry->old_sector = from;
|
|
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
|
|
),
|
|
|
|
TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
|
|
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
|
|
(unsigned long long)__entry->sector,
|
|
__entry->nr_sector,
|
|
MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
|
|
(unsigned long long)__entry->old_sector)
|
|
);
|
|
|
|
#endif /* _TRACE_BLOCK_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|
|
|