diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2015-02-07 02:52:23 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2015-02-07 02:52:23 +0100 |
| commit | b8cf3cb879a19c001796329ebe266104d13e63be (patch) | |
| tree | 745534899e603d5336347c846ad286c3535c43fc /sys/src/9/port/portdat.h | |
| parent | f215b660b30cc5e5d318922f545441b4ac14b200 (diff) | |
kernel: reduce Page structure size by changing Page.cachectl[]
there are no kernels currently that do page coloring,
so the only use of cachectl[] is flushing the icache
(on arm and ppc).
on pc64, cachectl consumes 32 bytes in each page resulting
in over 200 megabytes of overhead for 32gb of ram with 4K
pages.
this change removes cachectl[] and adds txtflush ulong
that is set to ~0 by pio() to instruct putmmu() to flush
the icache.
Diffstat (limited to 'sys/src/9/port/portdat.h')
| -rw-r--r-- | sys/src/9/port/portdat.h | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/sys/src/9/port/portdat.h b/sys/src/9/port/portdat.h index af33ea8a1..96e823766 100644 --- a/sys/src/9/port/portdat.h +++ b/sys/src/9/port/portdat.h @@ -292,11 +292,6 @@ struct Note enum { - PG_NOFLUSH = 0, - PG_TXTFLUSH = 1, /* flush dcache and invalidate icache */ - PG_DATFLUSH = 2, /* flush both i & d caches (UNUSED) */ - PG_NEWCOL = 3, /* page has been recolored */ - PG_MOD = 0x01, /* software modified bit */ PG_REF = 0x02, /* software referenced bit */ }; @@ -309,10 +304,10 @@ struct Page uintptr va; /* Virtual address for user */ uintptr daddr; /* Disc address on swap */ Image *image; /* Associated text or swap image */ + ulong txtflush; /* Flush icache for putmmu */ ushort refage; /* Swap reference age */ char modref; /* Simulated modify/reference bits */ char color; /* Cache coloring */ - char cachectl[MAXMACH]; /* Cache flushing control for putmmu */ }; struct Swapalloc |