diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-06-01 03:13:58 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-06-01 03:13:58 +0200 |
| commit | c9f91d50154015ef31b6e63131847742893ffc91 (patch) | |
| tree | 8a94dce9adbe9ca224c6112d9080296ef57ba7e6 /sys/src/9/port/page.c | |
| parent | 8061f30e559569943324a666ee2fcc74048785cd (diff) | |
pc64: allocate palloc.pages from upages
the palloc.pages array takes arround 5% of the upages which
gives us:
16GB = ~0.8GB
32GB = ~1.6GB
64GB = ~3.2GB
we only have 2GB of address space above KZERO so this will not
work for long.
instead, pageinit() was altered to accept a preallocated memory
in palloc.pages. and preallocpages() in pc64/main.c allocates the
in upages memory, mapping it in the VMAP area (which has 512GB).
the drawback is that we cannot poke at Page structures now from
/proc/n/mem as the VMAP area is not accessible from it.
Diffstat (limited to 'sys/src/9/port/page.c')
| -rw-r--r-- | sys/src/9/port/page.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/sys/src/9/port/page.c b/sys/src/9/port/page.c index 96b7b9ab7..48e393d2b 100644 --- a/sys/src/9/port/page.c +++ b/sys/src/9/port/page.c @@ -16,16 +16,19 @@ pageinit(void) Page *p; Pallocmem *pm; vlong m, v, u; - ulong np; - np = 0; - for(i=0; i<nelem(palloc.mem); i++){ - pm = &palloc.mem[i]; - np += pm->npage; + if(palloc.pages == nil){ + ulong np; + + np = 0; + for(i=0; i<nelem(palloc.mem); i++){ + pm = &palloc.mem[i]; + np += pm->npage; + } + palloc.pages = xalloc(np*sizeof(Page)); + if(palloc.pages == nil) + panic("pageinit"); } - palloc.pages = xalloc(np*sizeof(Page)); - if(palloc.pages == 0) - panic("pageinit"); color = 0; palloc.head = palloc.pages; @@ -33,6 +36,7 @@ pageinit(void) for(i=0; i<nelem(palloc.mem); i++){ pm = &palloc.mem[i]; for(j=0; j<pm->npage; j++){ + memset(p, 0, sizeof *p); p->prev = p-1; p->next = p+1; p->pa = pm->base+j*BY2PG; |