1992/0628/port/swap.c (diff list | history)

1992/0625/sys/src/9/port/swap.c:37,63 – 1992/0628/sys/src/9/port/swap.c:37,50 (short | long | prev | next)
1991/0705		newswap(void) { char *look; int n; lock(&swapalloc); if(swapalloc.free == 0) panic("out of swap space"); n = swapalloc.top - swapalloc.alloc; look = swapalloc.alloc; while(n && *look) { n--; look++; } if(n == 0) { look = swapalloc.swmap; while(*look) look++; } if(look == swapalloc.top) swapalloc.alloc = swapalloc.swmap; else swapalloc.alloc = look+1;
1992/0628		look = memchr(swapalloc.swmap, 0, conf.nswap); if(look == 0) panic("inconsistant swap");
1991/0705		*look = 1;
1991/0928		swapalloc.free--;
1992/0625/sys/src/9/port/swap.c:116,122 – 1992/0628/sys/src/9/port/swap.c:103,109
1992/0301
1992/0303		for(;;) { p++; if(p > ep)
1992/0628		if(p >= ep)
1992/0303		p = proctab(0);
1991/0705
1992/0303		if(p->state == Dead || p->kp)
1992/0625/sys/src/9/port/swap.c:126,131 – 1992/0628/sys/src/9/port/swap.c:113,119
1992/0303		for(i = 0; i < NSEG; i++) { if(!needpages(junk)) goto loop;
1992/0628
1992/0303		if(s = p->seg[i]) {
1992/0304		type = s->type&SG_TYPE; switch(type) {
1992/0625/sys/src/9/port/swap.c:264,281 – 1992/0628/sys/src/9/port/swap.c:252,269
1991/0705		case SG_STACK: case SG_SHARED:
1992/0307		case SG_SHDATA:
1992/0628		daddr = newswap();
1992/0625		lock(outp);
1991/0705		outp->ref++; uncachepage(outp);
1992/0625		unlock(outp);
1991/0705		daddr = newswap(); outp->daddr = daddr;                  /* Enter swap page into cache before segment is unlocked so that * a fault will cause a cache recovery rather than a pagein on a * partially written block. */
1992/0628		outp->daddr = daddr;
1991/0705		cachepage(outp, &swapimage); *pg = (Page*)(daddr|PG_ONSWAP);