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Request a CPU private mapping from sf_buf_alloc().

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This commit is contained in:
alc 2005-02-13 23:09:36 +00:00
parent 55d920055d
commit 4c99d150db
1 changed files with 5 additions and 1 deletions
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6
sys/i386/i386/uio_machdep.c
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@ -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;