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hpdata: Return the number of pages to be purged.

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We'll use this in the next commit.
This commit is contained in:
David Goldblatt 2020-12-06 13:16:51 -08:00 • committed by David Goldblatt
parent 9fd9c876bb
commit dc886e5608
3 changed files with 13 additions and 5 deletions
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7
src/hpdata.c
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@ -158,7 +158,7 @@ hpdata_unreserve(hpdata_t *hpdata, void *addr, size_t sz) {
hpdata_assert_consistent(hpdata);
}
void
size_t
hpdata_purge_begin(hpdata_t *hpdata, hpdata_purge_state_t *purge_state) {
hpdata_assert_consistent(hpdata);
/* See the comment in reserve. */
@ -181,10 +181,13 @@ hpdata_purge_begin(hpdata_t *hpdata, hpdata_purge_state_t *purge_state) {
hpdata->touched_pages, HUGEPAGE_PAGES);
/* We purge everything we can. */
assert(hpdata->h_ntouched - hpdata->h_nactive == fb_scount(
size_t to_purge = hpdata->h_ntouched - hpdata->h_nactive;
assert(to_purge == fb_scount(
purge_state->to_purge, HUGEPAGE_PAGES, 0, HUGEPAGE_PAGES));
hpdata_assert_consistent(hpdata);
return to_purge;
}
bool