Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Don't assume rump kernel PAGE_SIZE and host page size are the same.

Browse Source
This commit is contained in:
pooka 2011-03-11 09:25:59 +00:00
parent 1fc2db839a
commit a6893ed075
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
sys/rump/net/lib/libshmif/if_shmem.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: if_shmem.c,v 1.35 2011/03/10 13:27:03 pooka Exp $ */
/* $NetBSD: if_shmem.c,v 1.36 2011/03/11 09:25:59 pooka Exp $ */
/*
* Copyright (c) 2009 Antti Kantee. All Rights Reserved.
@ -28,7 +28,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_shmem.c,v 1.35 2011/03/10 13:27:03 pooka Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_shmem.c,v 1.36 2011/03/11 09:25:59 pooka Exp $");
#include <sys/param.h>
#include <sys/atomic.h>
@ -219,10 +219,14 @@ initbackend(struct shmif_sc *sc, int memfd)
return ENOEXEC;
}
/* Prefault in pages to minimize runtime penalty with buslock */
/*
* Prefault in pages to minimize runtime penalty with buslock.
* Use 512 instead of PAGE_SIZE to make sure we catch cases where
* rump kernel PAGE_SIZE > host page size.
*/
for (p = (uint8_t *)sc->sc_busmem;
p < (uint8_t *)sc->sc_busmem + BUSMEM_SIZE;
p += PAGE_SIZE)
p += 512)
v = *p;
shmif_lockbus(sc->sc_busmem);