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Add output argument to hpa_purge_begin to count dirty ranges

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This commit is contained in:
Slobodan Predolac 2025-04-08 10:49:05 -07:00
parent cdf72dda56
commit 925d7b3cf5
5 changed files with 27 additions and 9 deletions
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4
src/hpa.c
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@ -465,8 +465,10 @@ hpa_try_purge(tsdn_t *tsdn, hpa_shard_t *shard) {
/* Gather all the metadata we'll need during the purge. */
bool dehugify = hpdata_huge_get(to_purge);
size_t nranges;
hpdata_purge_state_t purge_state;
size_t num_to_purge = hpdata_purge_begin(to_purge, &purge_state);
size_t num_to_purge = hpdata_purge_begin(to_purge, &purge_state, &nranges);
(void) nranges; /*not used yet */
shard->npending_purge += num_to_purge;

7
src/hpdata.c
View file

@ -164,7 +164,8 @@ hpdata_unreserve(hpdata_t *hpdata, void *addr, size_t sz) {
}
size_t
hpdata_purge_begin(hpdata_t *hpdata, hpdata_purge_state_t *purge_state) {
hpdata_purge_begin(hpdata_t *hpdata, hpdata_purge_state_t *purge_state,
size_t *nranges) {
hpdata_assert_consistent(hpdata);
/*
* See the comment below; we might purge any inactive extent, so it's
@ -216,6 +217,7 @@ hpdata_purge_begin(hpdata_t *hpdata, hpdata_purge_state_t *purge_state) {
fb_init(purge_state->to_purge, HUGEPAGE_PAGES);
size_t next_bit = 0;
*nranges = 0;
while (next_bit < HUGEPAGE_PAGES) {
size_t next_dirty = fb_ffs(dirty_pages, HUGEPAGE_PAGES,
next_bit);
@ -239,6 +241,7 @@ hpdata_purge_begin(hpdata_t *hpdata, hpdata_purge_state_t *purge_state) {
fb_set_range(purge_state->to_purge, HUGEPAGE_PAGES, next_dirty,
last_dirty - next_dirty + 1);
(*nranges)++;
next_bit = next_active + 1;
}
@ -249,6 +252,8 @@ hpdata_purge_begin(hpdata_t *hpdata, hpdata_purge_state_t *purge_state) {
purge_state->to_purge, HUGEPAGE_PAGES, 0, HUGEPAGE_PAGES));
assert(ndirty == fb_scount(dirty_pages, HUGEPAGE_PAGES, 0,
HUGEPAGE_PAGES));
assert(*nranges <= ndirty);
assert(ndirty == 0 || *nranges > 0);
hpdata_assert_consistent(hpdata);