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bdev/rbd: change the poller to timer poller

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Poll it every 50 microseconds.
Reason: Ceph's librbd service is not very fast.
So choose a timer period to poll it, instead of
use the syscall to poll it again and again, it
is unnecessary. And this is a default value,
which can be tuned by customers later.

Change-Id: I91c31442da5ddadf3bef43083bd789d01bb1c952
Signed-off-by: Ziye Yang <optimistyzy@gmail.com>
Reviewed-on: https://review.gerrithub.io/417442
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Ziye Yang 2018-07-02 15:24:17 +08:00 committed by Jim Harris
parent 893f26e84b
commit abc3bc4f8e
1 changed files with 3 additions and 1 deletions
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4
lib/bdev/rbd/bdev_rbd.c
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@ -54,6 +54,8 @@
static int bdev_rbd_count = 0;
#define BDEV_RBD_POLL_US 50
struct bdev_rbd {
struct spdk_bdev disk;
char *rbd_name;
@ -512,7 +514,7 @@ bdev_rbd_create_cb(void *io_device, void *ctx_buf)
goto err;
}
ch->poller = spdk_poller_register(bdev_rbd_io_poll, ch, 0);
ch->poller = spdk_poller_register(bdev_rbd_io_poll, ch, BDEV_RBD_POLL_US);
return 0;