Date: Fri, 18 Aug 2023 23:57:34 GMT From: Mateusz Guzik <mjg@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 64e881f2db96 - main - vfs: track how many times vn_alloc blocked on hitting the vnode limit Message-ID: <202308182357.37INvYbI084004@gitrepo.freebsd.org>
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The branch main has been updated by mjg: URL: https://cgit.FreeBSD.org/src/commit/?id=64e881f2db968bf10c4aa22668ea270e1b9dd3c1 commit 64e881f2db968bf10c4aa22668ea270e1b9dd3c1 Author: Mateusz Guzik <mjg@FreeBSD.org> AuthorDate: 2023-08-18 23:56:58 +0000 Commit: Mateusz Guzik <mjg@FreeBSD.org> CommitDate: 2023-08-18 23:56:58 +0000 vfs: track how many times vn_alloc blocked on hitting the vnode limit --- sys/kern/vfs_subr.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index 36bf8d80782a..0f3f00abfd4a 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -1712,6 +1712,10 @@ vtryrecycle(struct vnode *vp) * vnlru to clear things up, but ultimately always performs a M_WAITOK allocation. */ static u_long vn_alloc_cyclecount; +static u_long vn_alloc_sleeps; + +SYSCTL_ULONG(_vfs, OID_AUTO, vnode_alloc_sleeps, CTLFLAG_RD, &vn_alloc_sleeps, 0, + "Number of times vnode allocation blocked waiting on vnlru"); static struct vnode * __noinline vn_alloc_hard(struct mount *mp) @@ -1746,6 +1750,7 @@ vn_alloc_hard(struct mount *mp) * Wait for space for a new vnode. */ vnlru_kick(); + vn_alloc_sleeps++; msleep(&vnlruproc_sig, &vnode_list_mtx, PVFS, "vlruwk", hz); if (atomic_load_long(&numvnodes) + 1 > desiredvnodes && vnlru_read_freevnodes() > 1)
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