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| author | alc <alc@FreeBSD.org> | 2012-05-18 05:36:04 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2012-05-18 05:36:04 +0000 |
| commit | eba132f415a1222ad568372f289b15e1d838fb05 (patch) | |
| tree | 3ef3ba31bad2506ab41ce284c292b71ee0b9d718 /sys/amd64/include | |
| parent | 6fce315734ae68ff89003ff88fc8c19be17e97a8 (diff) | |
| download | FreeBSD-src-eba132f415a1222ad568372f289b15e1d838fb05.zip FreeBSD-src-eba132f415a1222ad568372f289b15e1d838fb05.tar.gz | |
Rename pmap_collect() to pmap_pv_reclaim() and rewrite it such that it no
longer uses the active and inactive paging queues. Instead, the pmap now
maintains an LRU-ordered list of pv entry pages, and pmap_pv_reclaim() uses
this list to select pv entries for reclamation.
Note: The old pmap_collect() tried to avoid reclaiming mappings for pages
that have either a hold_count or a busy field that is non-zero. However,
this isn't necessary for correctness, and the locking in pmap_collect() was
insufficient to guarantee that such mappings weren't reclaimed. The new
pmap_pv_reclaim() doesn't even try.
Reviewed by: kib
MFC after: 6 weeks
Diffstat (limited to 'sys/amd64/include')
| -rw-r--r-- | sys/amd64/include/pmap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/amd64/include/pmap.h b/sys/amd64/include/pmap.h index 1b8108a..48758ef 100644 --- a/sys/amd64/include/pmap.h +++ b/sys/amd64/include/pmap.h @@ -295,7 +295,7 @@ struct pv_chunk { pmap_t pc_pmap; TAILQ_ENTRY(pv_chunk) pc_list; uint64_t pc_map[_NPCM]; /* bitmap; 1 = free */ - uint64_t pc_spare[2]; + TAILQ_ENTRY(pv_chunk) pc_lru; struct pv_entry pc_pventry[_NPCPV]; }; |
