Port-amd64 archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

dropping d=1 w=0

We need to eliminate the pages that have the "dirty" bit set without the
"writable" bit set.

The biggest cause of these pages is pmap_write_protect(), which drops
PTE_W but leaves PTE_D. Both should be dropped:

	if (!(prot & VM_PROT_WRITE))
-		bit_rem = PTE_W;
+		bit_rem = PTE_W | PTE_D;


Home | Main Index | Thread Index | Old Index