diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2026-04-22 05:09:34 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2026-05-03 19:58:37 +0000 |
| commit | 067cfac2e7bd9dc857fb6cc504c01b0249bcd1b7 (patch) | |
| tree | 0a074e2f2833118b0e9890988326dc641a693943 | |
| parent | f9458655e78f6532e962a13d28d6a6086b4156de (diff) | |
bufspace_wait(): only try to help bufdaemon if there is a chance to help
Only call buf_flush() if there are some dirty buffers belonging to the
vnode we are allocating the buffer for. Otherwise the bd dirty queue
scan cannot find anything and it makes no sense to spend CPU doing it.
| -rw-r--r-- | sys/kern/vfs_bio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 8f47a7abbc5e..675f6fb4e526 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -727,7 +727,8 @@ bufspace_wait(struct bufdomain *bd, struct vnode *vp, int gbflags, BD_LOCK(bd); while (bd->bd_wanted) { if (vp != NULL && vp->v_type != VCHR && - (td->td_pflags & TDP_BUFNEED) == 0) { + (td->td_pflags & TDP_BUFNEED) == 0 && + vp->v_bufobj.bo_dirty.bv_cnt > 0) { BD_UNLOCK(bd); /* * getblk() is called with a vnode locked, and |