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If BIO is discarded or cross over end of device, BIO queueing trial doesn't occur. Actually the trace was called just before make_request at first: [PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23 2056a782f8e7e65fd4bfd027506b4ce1c5e9ccd4 And then 2 patches added some checks between them: [PATCH] md: check bio address after mapping through partitions 5ddfe9691c91a244e8d1be597b6428fcefd58103, [BLOCK] Don't allow empty barriers to be passed down to queues that don't grok them 51fd77bd9f512ab6cc9df0733ba1caaab89eb957 It breaks original goal. Let's trace it only when it happens. Signed-off-by: Minchan Kim <minchan.kim@gmail.com> Acked-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com> |
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| .. | ||
| as-iosched.c | ||
| blk-barrier.c | ||
| blk-core.c | ||
| blk-exec.c | ||
| blk-integrity.c | ||
| blk-ioc.c | ||
| blk-iopoll.c | ||
| blk-map.c | ||
| blk-merge.c | ||
| blk-settings.c | ||
| blk-softirq.c | ||
| blk-sysfs.c | ||
| blk-tag.c | ||
| blk-timeout.c | ||
| blk.h | ||
| bsg.c | ||
| cfq-iosched.c | ||
| compat_ioctl.c | ||
| deadline-iosched.c | ||
| elevator.c | ||
| genhd.c | ||
| ioctl.c | ||
| Kconfig | ||
| Kconfig.iosched | ||
| Makefile | ||
| noop-iosched.c | ||
| scsi_ioctl.c | ||