diff options
Diffstat (limited to 'sys/kern/vfs_bio.c')
| -rw-r--r-- | sys/kern/vfs_bio.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 22acde6dac09..86bf5c7c6a6c 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 1.143 1998/01/17 09:16:26 dyson Exp $ + * $Id: vfs_bio.c,v 1.144 1998/01/22 17:29:51 dyson Exp $ */ /* @@ -1132,17 +1132,26 @@ findkvaspace: if (vm_map_findspace(buffer_map, vm_map_min(buffer_map), maxsize, &addr)) { if (kvafreespace > 0) { - int tfree = 0; - for (bp1 = TAILQ_FIRST(&bufqueues[QUEUE_EMPTY]); - bp1 != NULL; bp1 = TAILQ_NEXT(bp1, b_freelist)) - if (bp1->b_kvasize != 0) { - tfree += bp1->b_kvasize; - bremfree(bp1); - bfreekva(bp1); - brelse(bp1); - if (tfree >= maxsize) - goto findkvaspace; + int totfree = 0, freed; + do { + freed = 0; + for (bp1 = TAILQ_FIRST(&bufqueues[QUEUE_EMPTY]); + bp1 != NULL; bp1 = TAILQ_NEXT(bp1, b_freelist)) { + if (bp1->b_kvasize != 0) { + totfree += bp1->b_kvasize; + freed = bp1->b_kvasize; + bremfree(bp1); + bfreekva(bp1); + brelse(bp1); + break; + } } + } while (freed); + /* + * if we found free space, then retry with the same buffer. + */ + if (totfree) + goto findkvaspace; } bp->b_flags |= B_INVAL; brelse(bp); |