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Re: A huge latency in ext4 and xfs because of stable page write

To: Stefan Ring <stefanrin@xxxxxxxxx>
Subject: Re: A huge latency in ext4 and xfs because of stable page write
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Thu, 13 Dec 2012 10:07:41 +1100
Cc: linux-ext4@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx
In-reply-to: <CAAxjCEwtpTKTO_=1yjvqAA8itF35u4QQLyK0GNomt_PQZ7Rh8Q@xxxxxxxxxxxxxx>
References: <20121211084520.GA13277@xxxxxxxxx> <20121211111707.GU15784@dastard> <20121212041803.GA29427@xxxxxxxxx> <20121212044948.GW16353@dastard> <20121212051332.GA6718@xxxxxxxxx> <CAAxjCEwtpTKTO_=1yjvqAA8itF35u4QQLyK0GNomt_PQZ7Rh8Q@xxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Wed, Dec 12, 2012 at 08:23:43AM +0100, Stefan Ring wrote:
> >> http://www.spinics.net/lists/linux-fsdevel/msg59421.html
> >
> > Thanks for pointing out.  So now it seems that only I can do is to
> > present a proposal to revert stable page write temporarily because it
> > causes a huge latency for some applications.
> There has just been a write-up on the topic of stable pages in last
> week’s LWN: http://lwn.net/Articles/528031/
> The link should become available for non-subscribers tomorrow.

This is what subscriber links are for - when a LWN article is
relevant to a specific discussion, a subscriber can use their
discretion to post world readable link to the pay-walled article so
everyone is able to read the article....

This is one of the reasons I really like LWN and the way Jon has set
up subscriptions (and encourage anyone who doesn't subscribe to do
so). The paywall is something I *choose* to participate
in to get articles as quickly as possible, but have the option of
being able to let non-subscribers read articles immediately if *I*
consider it relevant to a discussion. That's definitely the case

That said, a link has aleady been posted, so I don't have to do
anything but cheerlead here. :)


Dave Chinner

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