From: Christoph Hellwig <hch@infradead.org>
To: Richard Weinberger <richard@nod.at>
Cc: Christoph Hellwig <hch@infradead.org>,
user-mode-linux-devel@lists.sourceforge.net, dxld@darkboxed.org,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH] hostfs: Use noop_fsync for directories
Date: Wed, 14 Jan 2015 00:39:51 -0800 [thread overview]
Message-ID: <20150114083951.GA29714@infradead.org> (raw)
In-Reply-To: <54B59B9E.4000806@nod.at>
On Tue, Jan 13, 2015 at 11:26:38PM +0100, Richard Weinberger wrote:
> hostfs tries do reduce the amount of syscall between guest and host as much
> as possible. For file operations it passes everything down to the host but
> for directory operations only ->iterate() does.
>
> It is already horrible slow, if we add an ->open() for directory too it would
> get even more slower. :-(
This sounds fairlt dangerous. At least add some good documentation
explaining these semantics.
next prev parent reply other threads:[~2015-01-14 8:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-13 22:15 [PATCH] hostfs: Use noop_fsync for directories Richard Weinberger
2015-01-13 22:19 ` Christoph Hellwig
2015-01-13 22:26 ` Richard Weinberger
2015-01-14 8:39 ` Christoph Hellwig [this message]
2015-01-14 8:43 ` Richard Weinberger
2015-01-18 1:08 ` Daniel Gröber
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