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* If there are no free ranges left, the block cache will now reuse older

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blocks - this is not enough, though as it would also need to ask other
  volumes to free ranges.
* Increased the number of blocks to free in case of low memory.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16663 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2006-03-08 21:43:45 +00:00
parent f951ca0e6a
commit 17372b761e
1 changed files with 13 additions and 4 deletions
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src/system/kernel/cache/block_cache.cpp
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+13 -4
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@@ -218,8 +218,17 @@ block_cache::GetFreeRange()
// we need to allocate a new range // we need to allocate a new range
block_range *range; block_range *range;
if (block_range::New(this, &range) != B_OK) { if (block_range::New(this, &range) != B_OK) {
// ToDo: free up space in existing ranges RemoveUnusedBlocks(2, 50);
// We may also need to free ranges from other caches to get a free one
if (!free_ranges.IsEmpty())
return free_ranges.First();
RemoveUnusedBlocks(LONG_MAX, 50);
if (!free_ranges.IsEmpty())
return free_ranges.First();
// TODO: We also need to free ranges from other caches to get a free one
// (if not, an active volume might have stolen all free ranges already) // (if not, an active volume might have stolen all free ranges already)
return NULL; return NULL;
} }
@@ -377,11 +386,11 @@ block_cache::LowMemoryHandler(void *data, int32 level)
case B_NO_LOW_MEMORY: case B_NO_LOW_MEMORY:
return; return;
case B_LOW_MEMORY_NOTE: case B_LOW_MEMORY_NOTE:
free = 10; free = 50;
accessed = 2; accessed = 2;
break; break;
case B_LOW_MEMORY_WARNING: case B_LOW_MEMORY_WARNING:
free = 50; free = 200;
accessed = 10; accessed = 10;
break; break;
case B_LOW_MEMORY_CRITICAL: case B_LOW_MEMORY_CRITICAL: