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vm_object: use lookup_range in page_clean_flush

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In vm_object_page_clean_flush, replace the loop that uses
vm_radix_iter_next to visit consecutive pages with a call to
vm_radix_iter_lookup_range, then a loop to check the pages looked-up.
This achieves a small performance improvement.

Reviewed by:	alc
Differential Revision:	https://reviews.freebsd.org/D50425
This commit is contained in:
Doug Moore committed 2025-05-28 00:33:43 -05:00
1 parent d094dd9071
commit 18a62137df
1 file changed
+5 -4
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sys/vm/vm_object.c
+5 -4
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@@ -1008,15 +1008,16 @@ vm_object_page_clean_flush(struct pctrie_iter *pages, vm_page_t p,
vm_page_lock_assert(p, MA_NOTOWNED);
vm_page_assert_xbusied(p);
ma[0] = p;
for (count = 1; count < vm_pageout_page_count; count++) {
p = vm_radix_iter_next(pages);
if (p == NULL || vm_page_tryxbusy(p) == 0)
runlen = vm_radix_iter_lookup_range(pages, p->pindex + 1,
&ma[1], vm_pageout_page_count - 1);
for (count = 1; count <= runlen; count++) {
p = ma[count];
if (vm_page_tryxbusy(p) == 0)
break;
if (!vm_object_page_remove_write(p, flags, allclean)) {
vm_page_xunbusy(p);
break;
}
ma[count] = p;
}
vm_pageout_flush(ma, count, pagerflags, 0, &runlen, eio);