Author: imp
Date: Wed Aug 15 00:15:40 2018
New Revision: 337824
URL: https://svnweb.freebsd.org/changeset/base/337824
Log:
Flesh out a comment about what we're doing with read bias and trims.
Sponsored by: Netflix
Modified:
head/sys/cam/cam_iosched.c
Modified: head/sys/cam/cam_iosched.c
==============================================================================
--- head/sys/cam/cam_iosched.c Tue Aug 14 22:57:28 2018 (r337823)
+++ head/sys/cam/cam_iosched.c Wed Aug 15 00:15:40 2018 (r337824)
@@ -1311,7 +1311,9 @@ cam_iosched_get_trim(struct cam_iosched_softc *isc)
if (do_dynamic_iosched) {
/*
* If pending read, prefer that based on current read bias
- * setting.
+ * setting. The read bias is shared for both writes and
+ * TRIMs, but on TRIMs the bias is for a combined TRIM
+ * not a single TRIM request that's come in.
*/
if (bioq_first(&isc->bio_queue) && isc->current_read_bias) {
isc->current_read_bias--;
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