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Re: tune2fs -j on mounted FS



"Bill Rugolsky Jr." <brugolsky telemetry-investments com> writes:

> On Sat, Nov 01, 2003 at 02:58:28PM +0000, Sean Neakums wrote:
>> I tried reproducing this on my laptop, which also had an ext2 root and
>> was also running 2.6.0-test8.  I ran the tune2fs -j (same version and
>> source as above) and updated /etc/fstab as before.  Nothing seemed to
>> be breaking, so I went ahead and built 2.6.0-test9 in my homedir,
>> which is on a separate volume (/ and /boot are regular partitions;
>> /home, /usr and /var are lvm2 volumes.  The other box has a similar
>> configuration.).  When I ran make modules_install, messages of the
>> following form began streaming on the console:
>
> It is a brave man that uses 1K block filesystems with stacked devices;
> even /boot is 4K blocks on my machines. ;-p

I don't understand.  / and /boot are regular partitions, not logical
volumes.  All of the logical volumes except /usr/local are 4096-byte
blocks.

> You might want to try the latest DM patches from Joe Thornber's
> site,
>
>  http://people.sistina.com/~thornber/
>
> and consult the dm-devel mail list archives.  There have been
> a fairly steady stream of DM patches.  Note that there is a small
> problem in 2.6.0-test9-dm3; the fix from Kevin Corry is below; see
> the dm-devel archives.

I'm a subscribed to that list.  None of the fixes in -dm3 look all
that critical, to my unschooled eye, and I don't use snapshots, which
the patch below appears to be a fix for.

> Use s->chunk_size instead of chunk_size. The latter was modified earlier in
> snapshot_ctr.
>
> --- a/drivers/md/dm-snap.c	29 Oct 2003 15:58:59 -0000
> +++ b/drivers/md/dm-snap.c	31 Oct 2003 17:37:00 -0000
> @@ -527,7 +527,7 @@
>  	}
>  
>  	ti->private = s;
> -	ti->split_io = chunk_size;
> +	ti->split_io = s->chunk_size;
>  	return 0;
>  
>   bad6:
>
> I haven't had a chance to try it out myself.




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