code: plan9front

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gefs: improve heuristic for arena selection

--- a/sys/src/cmd/gefs/blk.c

+++ b/sys/src/cmd/gefs/blk.c

@@ -134,14 +134,14 @@

 static Arena*

 pickarena(uint ty, uint hint, int tries)

 {

-	uint n;

+	uint n, r;

-	n = hint + tries + ainc(&fs->roundrobin)/1024;

+	r = ainc(&fs->roundrobin)/2048;

 	if(ty == Tdat)

-		n++;

-	if(hint % fs->narena == 0)

-		n++;

-	return &fs->arenas[n%fs->narena];

+		n = hint % (fs->narena - 1) + r + 1;

+	else

+		n = r;

+	return &fs->arenas[(n + tries) % fs->narena];

 }

 Arena*