diff options
| author | Keir Fraser <keir.fraser@citrix.com> | 2009-01-05 10:44:39 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2009-01-05 10:44:39 +0000 |
| commit | 9ad9a1609fbe407bde40498428ec465a6bd977a8 (patch) | |
| tree | c41f096fcc2c138666d30bbbcfc8e3e7de4991a9 /xen/include/xen/grant_table.h | |
| parent | 41aa0b62699ecc9ac49ef3456b165c218aaeaaca (diff) | |
| download | xen-9ad9a1609fbe407bde40498428ec465a6bd977a8.tar.gz xen-9ad9a1609fbe407bde40498428ec465a6bd977a8.tar.bz2 xen-9ad9a1609fbe407bde40498428ec465a6bd977a8.zip | |
PoD memory 5/9: emergency scan
Implement "emergency scan" for zero pages, to deal with start-of-day
page scrubbers.
If the cache is running out, scan through memory looking for "zero
pages" that we can reclaim for the cache. This is necessary for
operating systems which have a start-of-day page scrubber which runs
before the balloon driver can balloon down to the target.
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Diffstat (limited to 'xen/include/xen/grant_table.h')
| -rw-r--r-- | xen/include/xen/grant_table.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/xen/include/xen/grant_table.h b/xen/include/xen/grant_table.h index 0164668e2c..85a7c17592 100644 --- a/xen/include/xen/grant_table.h +++ b/xen/include/xen/grant_table.h @@ -32,6 +32,7 @@ struct active_grant_entry { u32 pin; /* Reference count information. */ domid_t domid; /* Domain being granted access. */ + unsigned long gfn; /* Guest's idea of the frame being granted. */ unsigned long frame; /* Frame being granted. */ }; @@ -146,4 +147,7 @@ nr_active_grant_frames(struct grant_table *gt) return num_act_frames_from_sha_frames(nr_grant_frames(gt)); } +int +gnttab_is_granted(struct domain *d, xen_pfn_t gfn, int order); + #endif /* __XEN_GRANT_TABLE_H__ */ |