linux-kernel - Re: [git pull] vfs.git sysv pile

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Date:   Wed, 01 Mar 2023 14:21:56 +0100
From:   "Fabio M. De Francesco" <fmdefrancesco@...il.com>
To:     Jan Kara <jack@...e.cz>
Cc:     Al Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [git pull] vfs.git sysv pile

On mercoledì 1 marzo 2023 14:00:18 CET Jan Kara wrote:
> On Wed 01-03-23 12:20:56, Fabio M. De Francesco wrote:
> > On venerdì 24 febbraio 2023 04:26:57 CET Al Viro wrote:
> > > 	Fabio's "switch to kmap_local_page()" patchset (originally after the
> > > 
> > > ext2 counterpart, with a lot of cleaning up done to it; as the matter of
> > > fact, ext2 side is in need of similar cleanups - calling conventions 
there
> > > are bloody awful).
> > 
> > If nobody else is already working on these cleanups in ext2 following your
> > suggestion, I'd be happy to work on this by the end of this week. I only
> > need
> > a confirmation because I'd hate to duplicate someone else work.
> > 
> > > Plus the equivalents of minix stuff...
> > 
> > I don't know this other filesystem but I could take a look and see whether
> > it
> > resembles somehow sysv and ext2 (if so, this work would be pretty simple
> > too,
> > thanks to your kind suggestions when I worked on sysv and ufs).
> > 
> > I'm adding Jan to the Cc list to hear whether he is aware of anybody else
> > working on this changes for ext2. I'm waiting for a reply from you (@Al) 
or
> > Jan to avoid duplication (as said above).
> 
> I'm not sure what exactly Al doesn't like about how ext2 handles pages and
> mapping but if you have some cleanups in mind, sure go ahead.

Hi Jan,

I might explain here and now what Al is referring to I'd prefer to show the 
code :-)

In brief I had made the conversions of fs/ufs and fs/sysv from kmap() to 
kmap_local_page() by porting what had been done for ext2. At that point Al 
suggested a much cleaner and elegant approach. 

Therefore, I threw away the port from ext2 and sent a series of 4 patches 
according to a long list of suggestions that Al kindly provided to me.

Now he is asking for somebody doing the same changes in ext2 too.

Thanks for the immediate reply.

Fabio   

> I don't have
> any plans on working on that code in the near term.
> 
> 								
Honza
> --
> Jan Kara <jack@...e.com>
> SUSE Labs, CR