Date: Sun, 03 May 2026 19:59:07 +0000 From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 067cfac2e7bd - main - bufspace_wait(): only try to help bufdaemon if there is a chance to help Message-ID: <69f7a90b.40713.1ec9d773@gitrepo.freebsd.org>
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The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=067cfac2e7bd9dc857fb6cc504c01b0249bcd1b7 commit 067cfac2e7bd9dc857fb6cc504c01b0249bcd1b7 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2026-04-22 05:09:34 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2026-05-03 19:58:37 +0000 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. --- sys/kern/vfs_bio.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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, andhome | help
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