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block: make part_in_flight() take an array of two ints

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Instead of returning the count that matches the partition, pass
in an array of two ints. Index 0 will be filled with the inflight
count for the partition in question, and index 1 will filled
with the root inflight count, if the partition passed in is not the
root.

This is in preparation for being able to calculate both in one
go.

Reviewed-by: Bart Van Assche <[email protected]>
Reviewed-by: Omar Sandoval <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2017-08-08 17:49:47 -06:00
commit 0609e0efc5
4 changed files with 20 additions and 9 deletions
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4
block/genhd.c
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@ -1204,6 +1204,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
struct disk_part_iter piter;
struct hd_struct *hd;
char buf[BDEVNAME_SIZE];
unsigned int inflight[2];
int cpu;
/*
@ -1219,6 +1220,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
cpu = part_stat_lock();
part_round_stats(gp->queue, cpu, hd);
part_stat_unlock();
part_in_flight(gp->queue, hd, inflight);
seq_printf(seqf, "%4d %7d %s %lu %lu %lu "
"%u %lu %lu %lu %u %u %u %u\n",
MAJOR(part_devt(hd)), MINOR(part_devt(hd)),
@ -1231,7 +1233,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
part_stat_read(hd, merges[WRITE]),
part_stat_read(hd, sectors[WRITE]),
jiffies_to_msecs(part_stat_read(hd, ticks[WRITE])),
part_in_flight(gp->queue, hd),
inflight[0],
jiffies_to_msecs(part_stat_read(hd, io_ticks)),
jiffies_to_msecs(part_stat_read(hd, time_in_queue))
);