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SubjectRe: [PATCH 2/2] blktrace: fix output of BLK_TC_PC events
Hi Ingo,

I would like to ask what's the status of these 2 patches.

Arnaldo acked on them.

Li Zefan wrote:
> BLK_TC_PC events should be treated differently with BLK_TC_FS events.
>
> Before this patch:
>
> # echo 1 > /sys/block/sda/sda1/trace/enable
> # echo pc > /sys/block/sda/sda1/trace/act_mask
> # echo blk > /debugfs/tracing/current_tracer
> # (generate some BLK_TC_PC events)
> # cat trace
> bash-2184 [000] 1774.275413: 8,7 I N [bash]
> bash-2184 [000] 1774.275435: 8,7 D N [bash]
> bash-2184 [000] 1774.275540: 8,7 I R [bash]
> bash-2184 [000] 1774.275547: 8,7 D R [bash]
> ksoftirqd/0-4 [000] 1774.275580: 8,7 C N 0 [0]
> bash-2184 [000] 1774.275648: 8,7 I R [bash]
> bash-2184 [000] 1774.275653: 8,7 D R [bash]
> ksoftirqd/0-4 [000] 1774.275682: 8,7 C N 0 [0]
> bash-2184 [000] 1774.275739: 8,7 I R [bash]
> bash-2184 [000] 1774.275744: 8,7 D R [bash]
> ksoftirqd/0-4 [000] 1774.275771: 8,7 C N 0 [0]
> bash-2184 [000] 1774.275804: 8,7 I R [bash]
> bash-2184 [000] 1774.275808: 8,7 D R [bash]
> ksoftirqd/0-4 [000] 1774.275836: 8,7 C N 0 [0]
>
> After this patch:
>
> # cat trace
> bash-2263 [000] 366.782149: 8,7 I N 0 (00 ..) [bash]
> bash-2263 [000] 366.782323: 8,7 D N 0 (00 ..) [bash]
> bash-2263 [000] 366.782557: 8,7 I R 8 (25 00 ..) [bash]
> bash-2263 [000] 366.782560: 8,7 D R 8 (25 00 ..) [bash]
> ksoftirqd/0-4 [000] 366.782582: 8,7 C N (25 00 ..) [0]
> bash-2263 [000] 366.782648: 8,7 I R 8 (5a 00 3f 00) [bash]
> bash-2263 [000] 366.782650: 8,7 D R 8 (5a 00 3f 00) [bash]
> ksoftirqd/0-4 [000] 366.782669: 8,7 C N (5a 00 3f 00) [0]
> bash-2263 [000] 366.782710: 8,7 I R 8 (5a 00 08 00) [bash]
> bash-2263 [000] 366.782713: 8,7 D R 8 (5a 00 08 00) [bash]
> ksoftirqd/0-4 [000] 366.782730: 8,7 C N (5a 00 08 00) [0]
> bash-2263 [000] 366.783375: 8,7 I R 36 (5a 00 08 00) [bash]
> bash-2263 [000] 366.783379: 8,7 D R 36 (5a 00 08 00) [bash]
> ksoftirqd/0-4 [000] 366.783404: 8,7 C N (5a 00 08 00) [0]
>
> This is what we do with PC events in user-space blktrace.
>
> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
> ---


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