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* vm_page::offset is now called cache_offset and is now an uint32 instead of off_t;

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this saves 4 bytes per page. To compensate the loss of bytes, the offset is now
  stored in page size units, that's enough to address 2^44 or 16 TB (which is now
  the maximal supported file size!).
* Renamed vm_page::ppn to physical_page_number.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15637 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2005-12-21 12:38:31 +00:00
parent 3ca8cdfc07
commit 79f73dbc56
10 changed files with 67 additions and 57 deletions
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src/system/kernel/cache/file_cache.cpp
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+3 -3
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@@ -445,7 +445,7 @@ read_chunk_into_cache(file_cache_ref *ref, off_t offset, size_t size,
vm_cache_insert_page(cache, page, offset + pos);
addr_t virtualAddress;
if (vm_get_physical_page(page->ppn * B_PAGE_SIZE, &virtualAddress, PHYSICAL_PAGE_CAN_WAIT) < B_OK)
if (vm_get_physical_page(page->physical_page_number * B_PAGE_SIZE, &virtualAddress, PHYSICAL_PAGE_CAN_WAIT) < B_OK)
panic("could not get physical page");
add_to_iovec(vecs, vecCount, MAX_IO_VECS, virtualAddress, B_PAGE_SIZE);
@@ -578,7 +578,7 @@ write_chunk_to_cache(file_cache_ref *ref, off_t offset, size_t size,
vm_cache_insert_page(ref->cache, page, offset + pos);
addr_t virtualAddress;
vm_get_physical_page(page->ppn * B_PAGE_SIZE, &virtualAddress,
vm_get_physical_page(page->physical_page_number * B_PAGE_SIZE, &virtualAddress,
PHYSICAL_PAGE_CAN_WAIT);
add_to_iovec(vecs, vecCount, MAX_IO_VECS, virtualAddress, B_PAGE_SIZE);
@@ -773,7 +773,7 @@ cache_io(void *_cacheRef, off_t offset, addr_t buffer, size_t *_size, bool doWri
TRACE(("lookup page from offset %Ld: %p, size = %lu, pageOffset = %lu\n", offset, page, bytesLeft, pageOffset));
if (page != NULL
&& vm_get_physical_page(page->ppn * B_PAGE_SIZE,
&& vm_get_physical_page(page->physical_page_number * B_PAGE_SIZE,
&virtualAddress, PHYSICAL_PAGE_CAN_WAIT) == B_OK) {
// it is, so let's satisfy the first part of the request, if we have to
if (lastBuffer != buffer) {