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Revert "block: Forbid I/O throttling on nodes with multiple parents for 2.6"

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This reverts commit 76b223200e.

Now that I/O throttling is fully done on the BlockBackend level, there
is no reason any more to block I/O throttling for nodes with multiple
parents as the parents don't influence each other any more.

Conflicts:
	block.c

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2016-04-05 11:10:50 +02:00
parent 08e83aabe4
commit b26ded9a7d
2 changed files with 0 additions and 13 deletions
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6
block.c
View File

@ -1522,12 +1522,6 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
return -ENODEV;
}
if (bs->blk && blk_get_public(bs->blk)->throttle_state) {
error_setg(errp, "Cannot reference an existing block device for "
"which I/O throttling is enabled");
return -EINVAL;
}
bdrv_ref(bs);
*pbs = bs;
return 0;

7
blockdev.c
View File

@ -2652,13 +2652,6 @@ void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
goto out;
}
/* The BlockBackend must be the only parent */
assert(QLIST_FIRST(&bs->parents));
if (QLIST_NEXT(QLIST_FIRST(&bs->parents), next_parent)) {
error_setg(errp, "Cannot throttle device with multiple parents");
goto out;
}
throttle_config_init(&cfg);
cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;