From: Christoph Hellwig <hch@lst.de>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>,
axboe@kernel.dk, Milosz Tanski <milosz@adfin.com>,
Goldwyn Rodrigues <rgoldwyn@suse.com>,
mgorman@suse.de, Volker.Lendecke@sernet.de,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org
Subject: Re: non-blockling buffered reads
Date: Fri, 30 Jun 2017 02:34:57 +0200 [thread overview]
Message-ID: <20170630003457.GA5369@lst.de> (raw)
In-Reply-To: <20170629234657.GO10672@ZenIV.linux.org.uk>
On Fri, Jun 30, 2017 at 12:46:57AM +0100, Al Viro wrote:
> Hmm... It's not quite non-blocking, though - copy_page_to_iter() can
> bloody well block, as any copying to userland. I'm not saying that
> it's a significant problem (if you are reading into something that
> had been mmaped from NFS server, etc., you are getting what you'd
> asked for), but it's worth documenting.
True. I'll ensure this is documented in the man page.
next prev parent reply other threads:[~2017-06-30 0:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-29 21:25 non-blockling buffered reads Christoph Hellwig
2017-06-29 21:25 ` [PATCH 1/3] fs: pass iocb to do_generic_file_read Christoph Hellwig
2017-06-29 21:25 ` [PATCH 2/3] fs: support IOCB_NOWAIT in generic_file_buffered_read Christoph Hellwig
2017-06-29 21:25 ` [PATCH 3/3] fs: support RWF_NOWAIT for buffered reads Christoph Hellwig
2017-06-30 3:43 ` Goldwyn Rodrigues
2017-06-29 23:46 ` non-blockling " Al Viro
2017-06-30 0:34 ` Christoph Hellwig [this message]
2017-06-30 1:12 ` Milosz Tanski
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