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authoralc <alc@FreeBSD.org>2005-02-13 23:09:36 +0000
committeralc <alc@FreeBSD.org>2005-02-13 23:09:36 +0000
commit4c99d150db9b8067bc79c48446fe1da203819f5c (patch)
tree2e0f1c05d50b53005dc2556ecf7a269165d5d37c
parent55d920055d2bedc63ec21c5bd71bc059bca340b6 (diff)
downloadFreeBSD-src-4c99d150db9b8067bc79c48446fe1da203819f5c.zip
FreeBSD-src-4c99d150db9b8067bc79c48446fe1da203819f5c.tar.gz
Request a CPU private mapping from sf_buf_alloc().
-rw-r--r--sys/i386/i386/uio_machdep.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/i386/i386/uio_machdep.c b/sys/i386/i386/uio_machdep.c
index 2110c6c..3558ec0 100644
--- a/sys/i386/i386/uio_machdep.c
+++ b/sys/i386/i386/uio_machdep.c
@@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
+#include <sys/sched.h>
#include <sys/sf_buf.h>
#include <sys/systm.h>
#include <sys/uio.h>
@@ -84,7 +85,8 @@ uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio)
cnt = n;
page_offset = offset & PAGE_MASK;
cnt = min(cnt, PAGE_SIZE - page_offset);
- sf = sf_buf_alloc(ma[offset >> PAGE_SHIFT], 0);
+ sched_pin();
+ sf = sf_buf_alloc(ma[offset >> PAGE_SHIFT], SFB_CPUPRIVATE);
cp = (char *)sf_buf_kva(sf) + page_offset;
switch (uio->uio_segflg) {
case UIO_USERSPACE:
@@ -96,6 +98,7 @@ uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio)
error = copyin(iov->iov_base, cp, cnt);
if (error) {
sf_buf_free(sf);
+ sched_unpin();
goto out;
}
break;
@@ -109,6 +112,7 @@ uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio)
break;
}
sf_buf_free(sf);
+ sched_unpin();
iov->iov_base = (char *)iov->iov_base + cnt;
iov->iov_len -= cnt;
uio->uio_resid -= cnt;
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