Softupdates not preventing lengthy fsck
Don Lewis
truckman at FreeBSD.org
Tue Apr 12 05:01:58 PDT 2005
On 11 Apr, Kris Kennaway wrote:
> On Mon, Apr 11, 2005 at 06:43:17PM -0700, Don Lewis wrote:
>> On 11 Apr, Kris Kennaway wrote:
>> > I'm seeing the following problem: on 6.0 machines which have had a lot
>> > of FS activity in the past but are currently quiet, an unclean reboot
>> > will require an hour or more of fscking and will end up clearing
>> > thousands of inodes:
>> >
>> > [...]
>> > /dev/da0s1e: UNREF FILE I=269731 OWNER=root MODE=100644
>> > /dev/da0s1e: SIZE=8555 MTIME=Apr 18 02:29 2002 (CLEARED)
>>
>> > /dev/da0s1e: UNREF FILE I=269741 OWNER=root MODE=100644
>> > [...]
>> >
>> > It's as if dirty buffers aren't being written out properly, or
>> > something. Has anyone else seen this?
>>
>> This looks a lot like it could be a vnode refcnt leak. Files won't get
>> removed from the disk while they are still in use (the old unlink while
>> open trick). Could nullfs be a factor?
>
> Yes, I make extensive use of read-only nullfs.
>
> Kris (fsck still running)
It would also be interesting to find out why fsck is taking so long to
run. I don't see anything obvious in the code.
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