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Flesh out a comment about what we're doing with read bias and trims.

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Sponsored by: Netflix
This commit is contained in:
Warner Losh 2018-08-15 00:15:40 +00:00
parent 56b9659ee7
commit 74cc33ce57
1 changed files with 3 additions and 1 deletions
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4
sys/cam/cam_iosched.c
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@ -1311,7 +1311,9 @@ cam_iosched_get_trim(struct cam_iosched_softc *isc)
if (do_dynamic_iosched) { if (do_dynamic_iosched) {
/* /*
* If pending read, prefer that based on current read bias * 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) { if (bioq_first(&isc->bio_queue) && isc->current_read_bias) {
isc->current_read_bias--; isc->current_read_bias--;