https://git.reactos.org/?p=reactos.git;a=commitdiff;h=4ff5d39edb2b9bf59ed78789b736cb276a6a249b
commit 4ff5d39edb2b9bf59ed78789b736cb276a6a249b Author: Jérôme Gardou <[email protected]> AuthorDate: Thu Mar 18 09:15:48 2021 +0100 Commit: Jérôme Gardou <[email protected]> CommitDate: Thu Mar 18 12:24:21 2021 +0100 [NTOS:MM] Use a define for the big pool table occupation rate --- ntoskrnl/mm/ARM3/expool.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/ntoskrnl/mm/ARM3/expool.c b/ntoskrnl/mm/ARM3/expool.c index 95bc21ad822..25ad64c62ae 100644 --- a/ntoskrnl/mm/ARM3/expool.c +++ b/ntoskrnl/mm/ARM3/expool.c @@ -22,6 +22,16 @@ #define POOL_BIG_TABLE_ENTRY_FREE 0x1 +/* + * This defines when we shrink or expand the table. + * 3 --> keep the number of used entries in the 33%-66% of the table capacity. + * 4 --> 25% - 75% + * etc. + */ +#define POOL_BIG_TABLE_USE_RATE 4 +#define POOL_BIG_TABLE_LOW_THRESHOLD (POOL_BIG_TABLE_USE_RATE * 2) +#define POOL_BIG_TABLE_HIGH_THRESHOLD ((POOL_BIG_TABLE_USE_RATE - 1) / POOL_BIG_TABLE_USE_RATE) + typedef struct _POOL_DPC_CONTEXT { PPOOL_TRACKER_TABLE PoolTrackTable; @@ -1626,7 +1636,7 @@ Retry: // which implies a massive number of concurrent big pool allocations. // ExpPoolBigEntriesInUse++; - if ((i >= 16) && (ExpPoolBigEntriesInUse > (TableSize * 3 / 4))) + if ((i >= 16) && (ExpPoolBigEntriesInUse > (TableSize * POOL_BIG_TABLE_HIGH_THRESHOLD))) { DPRINT("Attempting expansion since we now have %lu entries\n", ExpPoolBigEntriesInUse); @@ -1740,7 +1750,7 @@ ExpFindAndRemoveTagBigPages(IN PVOID Va, /* If reaching 12.5% of the size (or whatever integer rounding gets us to), * halve the allocation size, which will get us to 25% of space used. */ - if (ExpPoolBigEntriesInUse < (PoolBigPageTableSize / 8)) + if (ExpPoolBigEntriesInUse < (PoolBigPageTableSize / POOL_BIG_TABLE_LOW_THRESHOLD)) { /* Shrink the table. */ ExpReallocateBigPageTable(OldIrql, TRUE);
