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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-08-17 15:27:35 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-08-17 15:29:15 +0200 |
| commit | 250a41e0ecc433cdd553a364d0fc74c766425209 (patch) | |
| tree | 2ccf2047360e0729f20b45010c9e160bd35862c3 /drivers | |
| parent | Revert "xen PVonHVM: move shared_info to MMIO before kexec" (diff) | |
| download | linux-250a41e0ecc433cdd553a364d0fc74c766425209.tar.xz linux-250a41e0ecc433cdd553a364d0fc74c766425209.zip | |
xen/p2m: Reuse existing P2M leafs if they are filled with 1:1 PFNs or INVALID.
If P2M leaf is completly packed with INVALID_P2M_ENTRY or with
1:1 PFNs (so IDENTITY_FRAME type PFNs), we can swap the P2M leaf
with either a p2m_missing or p2m_identity respectively. The old
page (which was created via extend_brk or was grafted on from the
mfn_list) can be re-used for setting new PFNs.
This also means we can remove git commit:
5bc6f9888db5739abfa0cae279b4b442e4db8049
xen/p2m: Reserve 8MB of _brk space for P2M leafs when populating back
which tried to fix this.
and make the amount that is required to be reserved much smaller.
CC: stable@vger.kernel.org # for 3.5 only.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions