2001/0527/port/cache.c (diff list | history)

2001/0203/sys/src/9/port/cache.c:26,32 – 2001/0527/sys/src/9/port/cache.c:26,32 (short | long | prev | next)
1993/1013		typedef struct Mntcache Mntcache; struct Mntcache {
1993/1011		Qid;
2001/0527		Qid qid;
1993/1013		int dev; int type;
1993/1014		QLock;
2001/0203/sys/src/9/port/cache.c:111,120 – 2001/0527/sys/src/9/port/cache.c:111,120
1993/1014		m = cache.head;
1998/0512
2000/0609		/* a better algorithm would be nice */
2001/0203		// if(conf.npage*BY2PG > 200*MB) // maxcache = 10*MAXCACHE; // if(conf.npage*BY2PG > 400*MB) // maxcache = 50*MAXCACHE;
2001/0527		if(conf.npage*BY2PG > 200*MB) maxcache = 10*MAXCACHE; if(conf.npage*BY2PG > 400*MB) maxcache = 50*MAXCACHE;
1999/0903
1993/1016		for(i = 0; i < NFILE-1; i++) {
1993/1014		m->next = m+1;
2001/0203/sys/src/9/port/cache.c:148,154 – 2001/0527/sys/src/9/port/cache.c:148,154
1993/1018		o = e->start+e->len; } pprint("%s: 0x%lux.0x%lux %d %d %s (%d %c)\n",
1999/0629		s, m->path, m->vers, m->type, m->dev, c->name, nb, ct ? 'C' : 'N');
2001/0527		s, m->qid.path, m->qid.vers, m->type, m->dev, c->name, nb, ct ? 'C' : 'N');
1993/1014
1993/1018		for(e = m->list; e; e = e->next) {
1993/1103		pprint("\t%4d %5d %4d %lux\n",
2001/0203/sys/src/9/port/cache.c:216,228 – 2001/0527/sys/src/9/port/cache.c:216,230
1993/1018		Extent *e, *next;
1993/1013		Mntcache *m, *f, **l;
1993/1018		if(c->qid.path&CHDIR)
2001/0527		/* directories aren't cacheable and append-only files confuse us */ if(c->qid.type&(QTDIR|QTAPPEND))
1993/1015		return;
1993/1018		h = c->qid.path%NHASH;
1993/1016		lock(&cache);
1993/1018		for(m = cache.hash[h]; m; m = m->hash) {
1993/1016		if(m->path == c->qid.path)
2001/0527		if(m->qid.path == c->qid.path) if(m->qid.type == c->qid.type)
1993/1016		if(m->dev == c->dev && m->type == c->type) { c->mcp = m; ctail(m);
2001/0203/sys/src/9/port/cache.c:229,236 – 2001/0527/sys/src/9/port/cache.c:231,238
1993/1016		unlock(&cache);
1993/1015
1993/1016		/* File was updated, invalidate cache */ if(m->vers != c->qid.vers) {
1993/1018		m->vers = c->qid.vers;
2001/0527		if(m->qid.vers != c->qid.vers) { m->qid.vers = c->qid.vers;
1993/1016		qlock(m); cnodata(m); qunlock(m);
2001/0203/sys/src/9/port/cache.c:241,247 – 2001/0527/sys/src/9/port/cache.c:243,249
1993/1013		/* LRU the cache headers */ m = cache.head;
1993/1014		l = &cache.hash[m->path%NHASH];
2001/0527		l = &cache.hash[m->qid.path%NHASH];
1993/1016		for(f = *l; f; f = f->hash) {
1993/1013		if(f == m) {
1993/1018		*l = m->hash;
2001/0203/sys/src/9/port/cache.c:250,256 – 2001/0527/sys/src/9/port/cache.c:252,258
1993/1016		l = &f->hash;
1993/1013		}
1993/1015
1993/1014		m->Qid = c->qid;
2001/0527		m->qid = c->qid;
1993/1013		m->dev = c->dev; m->type = c->type;
1993/1018
2001/0203/sys/src/9/port/cache.c:276,288 – 2001/0527/sys/src/9/port/cache.c:278,292
1993/1013		static int cdev(Mntcache *m, Chan *c) {
1993/1014		if(m->path != c->qid.path)
2001/0527		if(m->qid.path != c->qid.path)
1993/1013		return 0;
2001/0527		if(m->qid.type != c->qid.type) return 0;
1993/1013		if(m->dev != c->dev) return 0; if(m->type != c->type) return 0;
1993/1018		if(m->vers != c->qid.vers)
2001/0527		if(m->qid.vers != c->qid.vers)
1993/1018		return 0;
1993/1013		return 1; }
2001/0203/sys/src/9/port/cache.c:573,579 – 2001/0527/sys/src/9/port/cache.c:577,583
1993/1015		}
1998/0327		offset = off;
1993/1015		m->vers++;
2001/0527		m->qid.vers++;
1993/1017		c->qid.vers++;
1993/1015		p = 0;