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cam/iosched: fix off by one error

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Set the bucket size to be SBT_1US/50000 + 1 to be the first number >
20us. I had this uncommitted in my three when I pushed 2283206935
since kern.cam.iosched.bucket_base_us was reporting 19us.

Fixes:		2283206935
Sponsored by:	Netflix
This commit is contained in:
Warner Losh 2021-12-05 22:57:50 -07:00
parent 2283206935
commit 1d92e81fa4
1 changed files with 1 additions and 1 deletions
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sys/cam/cam_iosched.c
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@ -112,7 +112,7 @@ SYSCTL_INT(_kern_cam_iosched, OID_AUTO, alpha_bits, CTLFLAG_RW | CTLFLAG_TUN,
* of 5.2s which is safeily larger than 1s to help diagnose extreme outliers better.
*/
#ifndef BUCKET_BASE
#define BUCKET_BASE (SBT_1S / 50000) /* 20us */
#define BUCKET_BASE ((SBT_1S / 50000) + 1) /* 20us */
#endif
static sbintime_t bucket_base = BUCKET_BASE;
SYSCTL_SBINTIME_USEC(_kern_cam_iosched, OID_AUTO, bucket_base_us, CTLFLAG_RD,