SEO

re
this switches vnd to use pool for it's buffer structures.
in particular it might be a bit faster as well as safe
in the interrupt context (vndiodone()).
please test in both vnd and svnd modes and report results.
10x
cu
--
paranoic mickey (my employers have changed but, the name has remained)

Index: vnd.c
================================================== =================
RCS file: /cvs/src/sys/dev/vnd.c,v
retrieving revision 1.53
diff -u -r1.53 vnd.c
--- vnd.c 5 Jan 2005 06:38:15 -0000 1.53
+++ vnd.c 30 Mar 2005 22:10:17 -0000
@@ -67,6 +67,7 @@
#include <sys/errno.h>
#include <sys/buf.h>
#include <sys/malloc.h>
+#include <sys/pool.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/device.h>
@@ -111,10 +112,13 @@
struct buf *vb_obp;
};

-#define getvndbuf() \
- ((struct vndbuf *)malloc(sizeof(struct vndbuf), M_DEVBUF, M_WAITOK))
-#define putvndbuf(vbp) \
- free((caddr_t)(vbp), M_DEVBUF)
+/*
+ * struct vndbuf allocator
+ */
+struct pool vndbufpl;
+
+#define getvndbuf() pool_get(&vndbufpl, PR_WAITOK)
+#define putvndbuf(vbp) pool_put(&vndbufpl, vbp);

struct vnd_softc {
struct device sc_dev;
@@ -205,6 +209,10 @@
bzero(mem, size);
vnd_softc = (struct vnd_softc *)mem;
numvnd = num;
+
+ pool_init(&vndbufpl, sizeof(struct vndbuf), 0, 0, 0, "vndbufpl", NULL);
+ pool_setlowat(&vndbufpl, 16);
+ pool_sethiwat(&vndbufpl, 1024);
}

int