Date: Sun, 26 Jan 2020 07:06:18 +0000 (UTC) From: Mateusz Guzik <mjg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r357136 - head/sys/kern Message-ID: <202001260706.00Q76ITq032296@repo.freebsd.org>
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Author: mjg Date: Sun Jan 26 07:06:18 2020 New Revision: 357136 URL: https://svnweb.freebsd.org/changeset/base/357136 Log: vfs: do an unlocked check before iterating the lazy list For most filesystems it is expected to be empty most of the time. Modified: head/sys/kern/vfs_subr.c Modified: head/sys/kern/vfs_subr.c ============================================================================== --- head/sys/kern/vfs_subr.c Sun Jan 26 07:05:06 2020 (r357135) +++ head/sys/kern/vfs_subr.c Sun Jan 26 07:06:18 2020 (r357136) @@ -6368,6 +6368,9 @@ __mnt_vnode_first_lazy(struct vnode **mvp, struct moun { struct vnode *vp; + if (TAILQ_EMPTY(&mp->mnt_lazyvnodelist)) + return (NULL); + *mvp = vn_alloc_marker(mp); MNT_ILOCK(mp); MNT_REF(mp);
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