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kernel: add pagechaindone() to wakeup processes waiting for memory

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we keep the details about palloc in page.c, providing pagechaindone()
for mmu code to be called after a series of pagechainhead() calls.
This commit is contained in:
cinap_lenrek 2015-06-15 17:40:47 +02:00
parent bce2696b17
commit 64ed3658d2
10 changed files with 29 additions and 23 deletions
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4
sys/src/9/alphapc/mmu.c
View file

@ -110,8 +110,8 @@ mmurelease(Proc *proc)
panic("mmurelease: page->ref %d\n", page->ref);
pagechainhead(page);
}
if(proc->mmufree && palloc.r.p)
wakeup(&palloc.r);
if(proc->mmufree)
pagechaindone();
proc->mmufree = 0;
}

6
sys/src/9/bcm/mmu.c
View file

@ -183,11 +183,11 @@ mmurelease(Proc* proc)
for(page = proc->mmul2cache; page != nil; page = next){
next = page->next;
if(--page->ref)
panic("mmurelease: page->ref %d", page->ref);
panic("mmurelease: page->ref %lud", page->ref);
pagechainhead(page);
}
if(proc->mmul2cache && palloc.r.p)
wakeup(&palloc.r);
if(proc->mmul2cache != nil)
pagechaindone();
proc->mmul2cache = nil;
mmul1empty();

6
sys/src/9/bitsy/mmu.c
View file

@ -447,14 +447,14 @@ mmurelease(Proc* p)
mmuptefree(p);
for(pg = p->mmufree; pg; pg = next){
for(pg = p->mmufree; pg != nil; pg = next){
next = pg->next;
if(--pg->ref)
panic("mmurelease: pg->ref %d\n", pg->ref);
pagechainhead(pg);
}
if(p->mmufree && palloc.r.p)
wakeup(&palloc.r);
if(p->mmufree != nil)
pagechaindone();
p->mmufree = nil;
memset(l1table, 0, sizeof(p->l1table));

4
sys/src/9/kw/mmu.c
View file

@ -264,8 +264,8 @@ mmurelease(Proc* proc)
panic("mmurelease: page->ref %lud", page->ref);
pagechainhead(page);
}
if(proc->mmul2cache && palloc.r.p)
wakeup(&palloc.r);
if(proc->mmul2cache != nil)
pagechaindone();
proc->mmul2cache = nil;
mmul1empty();

4
sys/src/9/pc/mmu.c
View file

@ -365,8 +365,8 @@ mmurelease(Proc* proc)
panic("mmurelease: page->ref %ld", page->ref);
pagechainhead(page);
}
if(proc->mmufree != nil && palloc.r.p != nil)
wakeup(&palloc.r);
if(proc->mmufree != nil)
pagechaindone();
proc->mmufree = nil;
if(proc->ldt != nil){
free(proc->ldt);

15
sys/src/9/port/page.c
View file

@ -71,6 +71,15 @@ pagechainhead(Page *p)
palloc.freecount++;
}
void
pagechaindone(void)
{
if(palloc.pwait[0].p != nil && wakeup(&palloc.pwait[0]) != nil)
return;
if(palloc.pwait[1].p != nil)
wakeup(&palloc.pwait[1]);
}
static void
freepages(Page *head, Page *tail, int n)
{
@ -79,11 +88,7 @@ freepages(Page *head, Page *tail, int n)
palloc.head = head;
palloc.freecount += n;
unlock(&palloc);
if(palloc.pwait[0].p != nil && wakeup(&palloc.pwait[0]) != nil)
return;
if(palloc.pwait[1].p != nil)
wakeup(&palloc.pwait[1]);
pagechaindone();
}
int

1
sys/src/9/port/portfns.h
View file

@ -201,6 +201,7 @@ int okaddr(uintptr, ulong, int);
int openmode(ulong);
Block* packblock(Block*);
Block* padblock(Block*, int);
void pagechaindone(void);
void pagechainhead(Page*);
void pageinit(void);
ulong pagenumber(Page*);

4
sys/src/9/teg2/mmu.c
View file

@ -487,8 +487,8 @@ mmurelease(Proc* proc)
panic("mmurelease: page->ref %d", page->ref);
pagechainhead(page);
}
if(proc->mmul2cache && palloc.r.p)
wakeup(&palloc.r);
if(proc->mmul2cache != nil)
pagechaindone();
proc->mmul2cache = nil;
mmul1empty();

4
sys/src/9/xen/mmu.c
View file

@ -288,8 +288,8 @@ mmurelease(Proc* proc)
panic("mmurelease: page->ref %ld\n", page->ref);
pagechainhead(page);
}
if(proc->mmufree && palloc.r.p)
wakeup(&palloc.r);
if(proc->mmufree)
pagechaindone();
proc->mmufree = 0;
}

4
sys/src/9/zynq/mmu.c
View file

@ -237,8 +237,8 @@ mmurelease(Proc *proc)
panic("mmurelease: p->ref %ld", p->ref);
pagechainhead(p);
}
if(proc->mmufree != nil && palloc.r.p != nil)
wakeup(&palloc.r);
if(proc->mmufree != nil)
pagechaindone();
proc->mmufree = nil;
}