Remove an arena_bin_run_size_calc() constraint.
Remove the constraint that small run headers fit in one page. This constraint was necessary to avoid dirty page purging issues for unused pages within runs for medium size classes (which no longer exist).
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@ -1367,7 +1367,6 @@ arena_tcache_fill_small(arena_t *arena, tcache_bin_t *tbin, size_t binind
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* *) bin->run_size >= min_run_size
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* *) bin->run_size <= arena_maxclass
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* *) run header overhead <= RUN_MAX_OVRHD (or header overhead relaxed).
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* *) run header size < PAGE_SIZE
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*
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* bin->nregs and bin->reg0_offset are also calculated here, since these
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* settings are all interdependent.
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@ -1453,8 +1452,7 @@ arena_bin_run_size_calc(arena_bin_t *bin, size_t min_run_size)
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} while (try_run_size <= arena_maxclass
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&& try_run_size <= arena_maxclass
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&& RUN_MAX_OVRHD * (bin->reg_size << 3) > RUN_MAX_OVRHD_RELAX
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&& (try_reg0_offset << RUN_BFP) > RUN_MAX_OVRHD * try_run_size
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&& try_hdr_size < PAGE_SIZE);
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&& (try_reg0_offset << RUN_BFP) > RUN_MAX_OVRHD * try_run_size);
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assert(good_hdr_size <= good_reg0_offset);
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