Date: Sat, 15 Jul 2000 00:23:50 +0200 (CEST) From: Marius Bendiksen <mbendiks@eunet.no> To: Duane Wessels <wessels@ircache.net> Cc: freebsd-fs@FreeBSD.ORG Subject: [kern/19479] Re: vnode/inode starvation Message-ID: <Pine.BSF.4.05.10007150021180.20991-100000@login-1.eunet.no> In-Reply-To: <Pine.SGI.4.10.10006261802260.9671-100000@surf.ircache.net>
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As noone seems to have touched the PR, you might want to try the following
patch:
--- ffs_vfsops.c.orig Sat Jul 15 00:24:10 2000
+++ ffs_vfsops.c Sat Jul 15 00:24:43 2000
@@ -1038,9 +1038,9 @@
/* Allocate a new vnode/inode. */
error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp);
if (error) {
if (ffs_inode_hash_lock < 0)
- wakeup(&ffs_inode_hash_lock);
+ wakeup_one(&ffs_inode_hash_lock);
ffs_inode_hash_lock = 0;
*vpp = NULL;
FREE(ip, ump->um_malloctype);
return (error);
@@ -1067,9 +1067,9 @@
*/
ufs_ihashins(ip);
if (ffs_inode_hash_lock < 0)
- wakeup(&ffs_inode_hash_lock);
+ wakeup_one(&ffs_inode_hash_lock);
ffs_inode_hash_lock = 0;
/* Read in the disk contents for the inode, copy into the inode. */
error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
--eof--
It's also available from my homepage at
http://home.eunet.no/~mbendiks/patches/ffs-fix2.patch
---
Marius Bendiksen
On Mon, 26 Jun 2000, Duane Wessels wrote:
> Hi,
>
> I have an application -- a caching proxy called Squid. When benchmarking
> Squid on FreeBSD-3.5, I'm seeing very high vnode (inode?) usage. After running
> for a few hours under peak load, all of the kernel virtual memory (?)
> is consumed by vnodes:
>
> Memory statistics by type Type Kern
> Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)
> 256 file desc, devbuf, temp, subproc, vnodes, ifaddr, routetbl, FFS node
> FFS node343147 85787K 85787K 85787K 742322 1 0 256
>
> At this point, any process that wants a new vnode is blocked. Top
> shows many processes in 'ffsvgt' state, and one process in 'FFS no'
> state.
>
> I'm using the RELENG_3 branch, sucked down on June 20:
> FreeBSD mr-garrison.measurement-factory.com 3.5-STABLE FreeBSD 3.5-STABLE #4: Tue Jun 20 14:15:04 MDT 2000
> root@mr-garrison.measurement-factory.com:/usr/src/sys/compile/SQUID i386
>
>
> I don't know a whole lot about kernel code and these sorts of low-level
> filesystem details. But it seems to me this is really strange. I don't
> unerstand why vnodes aren't being reused or freed.
>
> Does vnode reclaimation sort of rely on processes not living very
> long? In my case I have six squid processes that never die, each of
> which can touch 500,000 or more disk files.
>
> Ideas, references, explanations welcome...
>
> Duane W.
>
>
>
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