linux-kernel - Re: [PATCH v4 1/1] dcache: Translating dentry into pathname without taking rename

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Message-ID: <20130910082427.18481.qmail@science.horizon.com>
Date:	10 Sep 2013 04:24:27 -0400
From:	"George Spelvin" <linux@...izon.com>
To:	linux@...izon.com, viro@...IV.linux.org.uk
Cc:	aswin@...com, john@...ffel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, scott.norton@...com,
	torvalds@...ux-foundation.org, Waiman.Long@...com
Subject: Re: [PATCH v4 1/1] dcache: Translating dentry into pathname without taking rename_lock

> _What_ "pathname translations"?  Pathname resolution doesn't fall back to
> seq_writelock() at all.

I meant the translation of dentry to pathname that this thread is about.
Apologies for my confusing abbreviation.  Since the reverse translation
(pathname to dentry) is done a level at a time and people understand
that it's not atomic, I agree with Linus that a livelock there is too
remote a possibility to worry about.
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