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mdbx: упрощение gcu_loose() (backport).

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Леонид Юрьев (Leonid Yuriev) 2025-01-25 19:18:18 +03:00
parent 27a2166be7
commit a59c5f9316
1 changed files with 5 additions and 14 deletions
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19
src/gc-put.c
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@ -146,20 +146,12 @@ static inline void zeroize_reserved(const MDBX_env *env, MDBX_val pnl) {
static int gcu_loose(MDBX_txn *txn, gcu_t *ctx) {
tASSERT(txn, txn->tw.loose_count > 0);
/* Return loose page numbers to tw.repnl,
* though usually none are left at this point.
/* Return loose page numbers to tw.repnl, though usually none are left at this point.
* The pages themselves remain in dirtylist. */
if (unlikely(!txn->tw.gc.retxl && txn->tw.gc.last_reclaimed < 1)) {
TRACE("%s: try allocate gc-slot for %zu loose-pages", dbg_prefix(ctx), txn->tw.loose_count);
int err = gc_alloc_ex(&ctx->cursor, 0, ALLOC_RESERVE).err;
if (err == MDBX_SUCCESS) {
TRACE("%s: retry since gc-slot for %zu loose-pages available", dbg_prefix(ctx), txn->tw.loose_count);
return MDBX_RESULT_TRUE;
}
/* Put loose page numbers in tw.retired_pages,
* since unable to return ones to tw.repnl. */
err = pnl_need(&txn->tw.retired_pages, txn->tw.loose_count);
/* Put loose page numbers in tw.retired_pages, since unable to return ones to tw.repnl. */
TRACE("%s: merge %zu loose-pages into %s-pages", dbg_prefix(ctx), txn->tw.loose_count, "retired");
int err = pnl_need(&txn->tw.retired_pages, txn->tw.loose_count);
if (unlikely(err != MDBX_SUCCESS))
return err;
for (page_t *lp = txn->tw.loose_pages; lp; lp = page_next(lp)) {
@ -167,9 +159,9 @@ static int gcu_loose(MDBX_txn *txn, gcu_t *ctx) {
MDBX_ASAN_UNPOISON_MEMORY_REGION(&page_next(lp), sizeof(page_t *));
VALGRIND_MAKE_MEM_DEFINED(&page_next(lp), sizeof(page_t *));
}
TRACE("%s: append %zu loose-pages to retired-pages", dbg_prefix(ctx), txn->tw.loose_count);
} else {
/* Room for loose pages + temp PNL with same */
TRACE("%s: merge %zu loose-pages into %s-pages", dbg_prefix(ctx), txn->tw.loose_count, "reclaimed");
int err = pnl_need(&txn->tw.repnl, 2 * txn->tw.loose_count + 2);
if (unlikely(err != MDBX_SUCCESS))
return err;
@ -185,7 +177,6 @@ static int gcu_loose(MDBX_txn *txn, gcu_t *ctx) {
MDBX_PNL_SETSIZE(loose, count);
pnl_sort(loose, txn->geo.first_unallocated);
pnl_merge(txn->tw.repnl, loose);
TRACE("%s: append %zu loose-pages to reclaimed-pages", dbg_prefix(ctx), txn->tw.loose_count);
}
/* filter-out list of dirty-pages from loose-pages */