forked from luck/tmp_suning_uos_patched
c56004901f
This adds VM op batching to skas0. Rather than having a context switch to and from the userspace stub for each address space change, we write a number of operations to the stub data page and invoke a different stub which loops over them and executes them all in one go. The operations are stored as [ system call number, arg1, arg2, ... ] tuples. The set is terminated by a system call number of 0. Single operations, i.e. page faults, are handled in the old way, since that is slightly more efficient. For a kernel build, a minority (~1/4) of the operations are part of a set. These sets averaged ~100 in length, so for this quarter, the context switching overhead is greatly reduced. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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| .. | ||
| include | ||
| util | ||
| clone.c | ||
| exec_kern.c | ||
| Makefile | ||
| mem_user.c | ||
| mem.c | ||
| mmu.c | ||
| process_kern.c | ||
| process.c | ||
| syscall_kern.c | ||
| syscall_user.c | ||
| tlb.c | ||
| trap_user.c | ||
| uaccess.c | ||