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| author | Alexander Graf <agraf@suse.de> | 2010-04-20 02:49:48 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-05-17 12:18:58 +0300 |
| commit | f7bc74e1c306636a659a04805474b2f8fcbd1f7e (patch) | |
| tree | 5aa5c5c9676d577b55bbc700f1d5a6ee5c137a27 /block | |
| parent | 7fdaec997cc8ef77e8da7ed70f3d9f074b61c31f (diff) | |
| download | linux-f7bc74e1c306636a659a04805474b2f8fcbd1f7e.tar.bz2 | |
KVM: PPC: Improve split mode
When in split mode, instruction relocation and data relocation are not equal.
So far we implemented this mode by reserving a special pseudo-VSID for the
two cases and flushing all PTEs when going into split mode, which is slow.
Unfortunately 32bit Linux and Mac OS X use split mode extensively. So to not
slow down things too much, I came up with a different idea: Mark the split
mode with a bit in the VSID and then treat it like any other segment.
This means we can just flush the shadow segment cache, but keep the PTEs
intact. I verified that this works with ppc32 Linux and Mac OS X 10.4
guests and does speed them up.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions