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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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| .. | ||
| util | ||
| bugs.c | ||
| delay.c | ||
| fault.c | ||
| kernel-offsets.c | ||
| ksyms.c | ||
| Makefile | ||
| mem.c | ||
| ptrace_user.c | ||
| ptrace.c | ||
| sigcontext.c | ||
| signal.c | ||
| stub_segv.c | ||
| stub.S | ||
| syscall_table.c | ||
| syscalls.c | ||
| sysrq.c | ||
| um_module.c | ||
| unmap.c | ||
| user-offsets.c | ||