diff options
Diffstat (limited to 'sys/kern/vfs_bio.c')
| -rw-r--r-- | sys/kern/vfs_bio.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index a3c3e97..0817c7f 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$"); #include <sys/buf.h> #include <sys/devicestat.h> #include <sys/eventhandler.h> +#include <sys/fail.h> #include <sys/limits.h> #include <sys/lock.h> #include <sys/malloc.h> @@ -1167,6 +1168,15 @@ buf_dirty_count_severe(void) return(numdirtybuffers >= hidirtybuffers); } +static __noinline int +buf_vm_page_count_severe(void) +{ + + KFAIL_POINT_CODE(DEBUG_FP, buf_pressure, return 1); + + return vm_page_count_severe(); +} + /* * brelse: * @@ -1233,7 +1243,7 @@ brelse(struct buf *bp) */ if (bp->b_flags & B_DELWRI) bp->b_flags &= ~B_RELBUF; - else if (vm_page_count_severe()) { + else if (buf_vm_page_count_severe()) { /* * The locking of the BO_LOCK is not necessary since * BKGRDINPROG cannot be set while we hold the buf @@ -1502,7 +1512,7 @@ bqrelse(struct buf *bp) * lock, it can only be cleared if it is already * pending. */ - if (!vm_page_count_severe() || (bp->b_vflags & BV_BKGRDINPROG)) { + if (!buf_vm_page_count_severe() || (bp->b_vflags & BV_BKGRDINPROG)) { bp->b_qindex = QUEUE_CLEAN; TAILQ_INSERT_TAIL(&bufqueues[QUEUE_CLEAN], bp, b_freelist); @@ -1571,7 +1581,7 @@ vfs_vmio_release(struct buf *bp) vm_page_free(m); } else if (bp->b_flags & B_DIRECT) { vm_page_try_to_free(m); - } else if (vm_page_count_severe()) { + } else if (buf_vm_page_count_severe()) { vm_page_try_to_cache(m); } } |
