diff options
| author | dyson <dyson@FreeBSD.org> | 1997-12-01 19:04:00 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1997-12-01 19:04:00 +0000 |
| commit | ded4973e92fbb293864f4b990c9e9f2939f80cfd (patch) | |
| tree | 6e48de566417215f3d5e796f6660b1fbad995022 | |
| parent | ba00c38faa8954b1525941befa35bf9312aedb85 (diff) | |
| download | FreeBSD-src-ded4973e92fbb293864f4b990c9e9f2939f80cfd.zip FreeBSD-src-ded4973e92fbb293864f4b990c9e9f2939f80cfd.tar.gz | |
Fix a serious problem during resizing buffers where old buffers
address space wasn't being properly reclaimed.
Submitted by: Bruce Evans <bde@freebsd.org>
| -rw-r--r-- | sys/kern/vfs_bio.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 1361d43..8c4c9ca 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -18,7 +18,7 @@ * 5. Modifications may be freely made to this file if the above conditions * are met. * - * $Id: vfs_bio.c,v 1.134 1997/11/07 08:53:04 phk Exp $ + * $Id: vfs_bio.c,v 1.135 1997/11/24 06:18:27 dyson Exp $ */ /* @@ -901,7 +901,7 @@ vfs_bio_awrite(struct buf * bp) static struct buf * getnewbuf(struct vnode *vp, int slpflag, int slptimeo, int size, int maxsize) { - struct buf *bp; + struct buf *bp, *bp1; int nbyteswritten = 0; vm_offset_t addr; static int writerecursion = 0; @@ -1059,11 +1059,20 @@ fillbuf: if (maxsize != bp->b_kvasize) { bfreekva(bp); +findkvaspace: /* * See if we have buffer kva space */ if (vm_map_findspace(buffer_map, vm_map_min(buffer_map), maxsize, &addr)) { + for (bp1 = TAILQ_FIRST(&bufqueues[QUEUE_EMPTY]); + bp1 != NULL; bp1 = TAILQ_NEXT(bp1, b_freelist)) + if (bp1->b_kvasize != 0) { + bremfree(bp1); + bfreekva(bp1); + brelse(bp1); + goto findkvaspace; + } bp->b_flags |= B_INVAL; brelse(bp); goto trytofreespace; |
