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cache_io(): Also requeue the last touched page to keep things roughly LRU

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sorted.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35530 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
2010-02-20 10:51:53 +00:00
parent 62420a09d4
commit 9824ded0b0
1 changed files with 7 additions and 7 deletions
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src/system/kernel/cache/file_cache.cpp
Vendored
+7 -7
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@@ -824,13 +824,6 @@ cache_io(void* _cacheRef, void* cookie, off_t offset, addr_t buffer,
cache->MarkPageUnbusy(page); cache->MarkPageUnbusy(page);
} }
if (bytesLeft <= bytesInPage) {
// we've read the last page, so we're done!
locker.Unlock();
vm_page_unreserve_pages(&reservation);
return B_OK;
}
// If it is cached only, requeue the page, so the respective queue // If it is cached only, requeue the page, so the respective queue
// roughly remains LRU first sorted. // roughly remains LRU first sorted.
if (page->state == PAGE_STATE_CACHED if (page->state == PAGE_STATE_CACHED
@@ -840,6 +833,13 @@ cache_io(void* _cacheRef, void* cookie, off_t offset, addr_t buffer,
DEBUG_PAGE_ACCESS_END(page); DEBUG_PAGE_ACCESS_END(page);
} }
if (bytesLeft <= bytesInPage) {
// we've read the last page, so we're done!
locker.Unlock();
vm_page_unreserve_pages(&reservation);
return B_OK;
}
// prepare a potential gap request // prepare a potential gap request
lastBuffer = buffer + bytesInPage; lastBuffer = buffer + bytesInPage;
lastLeft = bytesLeft - bytesInPage; lastLeft = bytesLeft - bytesInPage;