linux-ext4 - Re: More thoughts about xattrs, journal credits, and their location

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Date:   Mon, 17 Jul 2017 16:42:42 +0200
From:   Jan Kara <jack@...e.cz>
To:     Andreas Dilger <adilger@...ger.ca>
Cc:     Tahsin Erdogan <tahsin@...gle.com>,
        "Theodore Y . Ts'o" <tytso@....edu>,
        Ext4 Developers List <linux-ext4@...r.kernel.org>,
        Jan Kara <jack@...e.cz>
Subject: Re: More thoughts about xattrs, journal credits, and their location

On Fri 14-07-17 15:13:27, Andreas Dilger wrote:
> >> The downsides of this approach is that it causes the orphan list to be
> >> a bottleneck.  So we would definitely not want to do this all time.
> > 
> > Yes and I think lazy extend/restart should mitigate this.
> 
> Jan had a patch to improve the orphan list performance that never made it
> into the kernel by having a per-CPU orphan list or similar.
> 
> It recall it got hung up on running out of reserved inodes or similar, which
> is an issue we should fix in any case.

Yeah, and I've submitted patches for e2fsprogs to be able to set number of
reserved inodes however they never got merged. I guess I can refresh those
patches and resend if there's interest in the functionality and the
feature...

								Honza


-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR