diff options
| author | Kirk McKusick <mckusick@FreeBSD.org> | 2001-04-17 05:37:51 +0000 |
|---|---|---|
| committer | Kirk McKusick <mckusick@FreeBSD.org> | 2001-04-17 05:37:51 +0000 |
| commit | 5819ab3f12bbe30611c3138af6a24c47486ea046 (patch) | |
| tree | cfcb7e31644e82e8bc769e309c72a58834ae0566 /sys/kern | |
| parent | f0f3f19f05312accfbc8bf3fb2ca2eff141bacc9 (diff) | |
Notes
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/vfs_bio.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 8017e19b2722..47059032cb48 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -604,6 +604,10 @@ breadn(struct vnode * vp, daddr_t blkno, int size, * or in biodone() since the I/O is synchronous. We put it * here. */ + +int dobkgrdwrite = 1; +SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, ""); + int bwrite(struct buf * bp) { @@ -648,7 +652,7 @@ bwrite(struct buf * bp) * This optimization eats a lot of memory. If we have a page * or buffer shortfall we can't do it. */ - if ((bp->b_xflags & BX_BKGRDWRITE) && + if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && (bp->b_flags & B_ASYNC) && !vm_page_count_severe() && !buf_dirty_count_severe()) { |