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Adjust ARC prefetch tunables to match docs

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Currently, the ARC exposes 2 tunables (zfs_arc_min_prefetch_ms
and zfs_arc_min_prescient_prefetch_ms) which are documented
to be specified in milliseconds. However, the code actually
uses the values as though they were in seconds. This patch
adjusts the code to match the names and documentation of the
tunables.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #7126
This commit is contained in:
Tom Caputi
2018-02-05 19:57:53 -05:00
committed by Brian Behlendorf
parent 60b8207496
commit 2b84817f66
2 changed files with 6 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/arc.c
+4 -4
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@@ -3845,7 +3845,8 @@ arc_evict_hdr(arc_buf_hdr_t *hdr, kmutex_t *hash_lock)
/* prefetch buffers have a minimum lifespan */
if (HDR_IO_IN_PROGRESS(hdr) ||
((hdr->b_flags & (ARC_FLAG_PREFETCH | ARC_FLAG_INDIRECT)) &&
ddi_get_lbolt() - hdr->b_l1hdr.b_arc_access < min_lifetime * hz)) {
ddi_get_lbolt() - hdr->b_l1hdr.b_arc_access <
MSEC_TO_TICK(min_lifetime))) {
ARCSTAT_BUMP(arcstat_evict_skip);
return (bytes_evicted);
}
@@ -7470,9 +7471,8 @@ arc_init(void)
cv_init(&arc_reclaim_thread_cv, NULL, CV_DEFAULT, NULL);
cv_init(&arc_reclaim_waiters_cv, NULL, CV_DEFAULT, NULL);
/* Convert seconds to clock ticks */
arc_min_prefetch_ms = 1;
arc_min_prescient_prefetch_ms = 6;
arc_min_prefetch_ms = 1000;
arc_min_prescient_prefetch_ms = 6000;
#ifdef _KERNEL
/*