diff options
author | Jeff Dike <jdike@addtoit.com> | 2005-09-03 15:57:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 00:06:22 -0700 |
commit | c56004901fa5dcf55f92318f192ab3c0e87db2d1 (patch) | |
tree | ac53ded16ab9886ce05d4b2d424dfed80dce9e57 /include | |
parent | 77fa5adcda6d686d2f45a2b55dcb9a03e7d33fa1 (diff) | |
download | linux-rt-c56004901fa5dcf55f92318f192ab3c0e87db2d1.tar.gz |
[PATCH] uml: TLB operation batching
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>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions