diff options
| author | dg <dg@FreeBSD.org> | 1998-11-18 09:00:47 +0000 |
|---|---|---|
| committer | dg <dg@FreeBSD.org> | 1998-11-18 09:00:47 +0000 |
| commit | 939b432d02d70b51f4c493b4539d70fc76b85817 (patch) | |
| tree | 9c19c39d996b0b6fcbe33ab03ffc075886f90908 /sys/kern/vfs_bio.c | |
| parent | feaedfaff603933e7dba04b2b6a7009f4251c507 (diff) | |
| download | FreeBSD-src-939b432d02d70b51f4c493b4539d70fc76b85817.zip FreeBSD-src-939b432d02d70b51f4c493b4539d70fc76b85817.tar.gz | |
Closed a very narrow and rare race condition that involved net interrupts,
bio interrupts, and a truncated file that along with the precise alignment
of the planets could result in a page being freed multiple times or a
just-freed page being put onto the inactive queue.
Diffstat (limited to 'sys/kern/vfs_bio.c')
| -rw-r--r-- | sys/kern/vfs_bio.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 0b5487c..5704558 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -11,7 +11,7 @@ * 2. Absolutely no warranty of function or purpose is made by the author * John S. Dyson. * - * $Id: vfs_bio.c,v 1.183 1998/10/30 14:53:54 dg Exp $ + * $Id: vfs_bio.c,v 1.184 1998/10/31 15:31:22 peter Exp $ */ /* @@ -788,9 +788,10 @@ static void vfs_vmio_release(bp) struct buf *bp; { - int i; + int i, s; vm_page_t m; + s = splvm(); for (i = 0; i < bp->b_npages; i++) { m = bp->b_pages[i]; bp->b_pages[i] = NULL; @@ -820,6 +821,7 @@ vfs_vmio_release(bp) } } } + splx(s); bufspace -= bp->b_bufsize; vmiospace -= bp->b_bufsize; pmap_qremove(trunc_page((vm_offset_t) bp->b_data), bp->b_npages); |
