Re: reiser4 performance

[David Masover <ninja@slaphack.com>]

Pat Double wrote:
> Forgive me for moving to private, but I've posted this on the list before 
> without comment.

Make it public again if you like.

> The 2.6.12.x patches and 2.6.12.x applied from -mm have incorrect behavior 
> when modifying the root directory. If you add or remove files in the root, 
> the filesystem check fails. You can try this on a ram disk or loop file 
> system. I'd be interested to see if you'd try it and let me know if you get a 
> failed filesystem check. I am able to repair without data loss.

I'll have to try it sometime, but not now.  Does this happen on that -mm 
kernel if you apply *all* the patches, not just reiser4-specific? 
(Doing this would eliminate the need for my patch, obviously.)

Incidentally, if you've been watching the list, I recently recovered 
some ungodly amount of data that I'd effectively "rm -rf"ed.  The kernel 
used both to create that catastrophy and to recover from it was a 
2.6.12.2 kernel, patched just as I described, using fsck.reiser4 1.0.4.

> On Tuesday 09 August 2005 08:34 pm, David Masover wrote:
> 
>>Gregory Maxwell wrote:
>>
>>>On 8/8/05, David Masover <ninja@slaphack.com> wrote:
>>
>>[...]
>>
>>
>>>My ability to use it is severely hampered only being able to use it on
>>>boxes running test-kernel of the day.. which are laden with other
>>>issues unrelated to reiser4 that I don't have time to deal with.
>>
>>How recent a Reiser4 do you need?  There are some patches against the
>>vanilla kernel at
>>
>>http://namesys.com/pub/reiser4-for-2.6/
>>
>>But those seem out of date and don't work for me.  But, the patches from
>>the mm-kernel have been rock-solid for me.  I'm taking the vanilla
>>2.6.12.3 kernel and patching it with the Reiser4 patches from
>>2.6.12-mm2.  Unpack this:
>>
>>http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12/2.6.12-mm
>>2/2.6.12-mm2-broken-out.tar.bz2
>>
>>to /usr/src/ and run this:
>>
>>#!/bin/sh
>># hack to bring mm reiser4 back to vanilla
>>cd /usr/src/linux
>>for i in `grep reiser4 ../broken-out/series`; do
>>	patch -p1 < ../broken-out/$i;
>>done
>>
>>I've attached one patch of my own that makes it compile properly --
>>apply after you run the script above.
> 
>