c5b309ff07
Main changes: - COW optimization for safecopy. - safemap, a grant-based interface for sharing memory regions between processes. - Integration with safemap and complete rework of DS, supporting new data types natively (labels, memory ranges, memory mapped ranges). - For further information: http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants Additional changes not included in the original Wu's branch: - Fixed unhandled case in VM when using COW optimization for safecopy in case of a block that has already been shared as SMAP. - Better interface and naming scheme for sys_saferevmap and ds_retrieve_map calls. - Better input checking in syslib: check for page alignment when creating memory mapping grants. - DS notifies subscribers when an entry is deleted. - Documented the behavior of indirect grants in case of memory mapping. - Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked and extended. - Minor fixes and general cleanup. - TO-DO: Grant ids should be generated and managed the way endpoints are to make sure grant slots are never misreused. |
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| .. | ||
| down | ||
| grantor.c | ||
| inc.h | ||
| Makefile | ||
| README | ||
| requestor.c | ||
| run | ||
| system.conf | ||
Test Program for Safecopy with or without COW How to run ========== Test safecopy with COW: 1. Set USE_COW_SAFECOPY to 1 in /usr/src/kernel/system/do_safecopy.c 2. Type `make run` to prepare and run test. 3. When done testing, type `make clean` to clean up. Test safecopy without COW: 1. Set USE_COW_SAFECOPY to 0 in /usr/src/kernel/system/do_safecopy.c 2. Type `make run` to prepare and run test. 3. When done testing, type `make clean` to clean up. If you want to modify the test buffer size: 1. Modify TEST_PAGE_NUM in inc.h 2. Modify TEST_PAGE_SHIFT in inc.h