linux-kernel - Re: [PATCH] workqueue: doc change for ST behavior on NUMA systems

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Message-ID: <20170718191829.GA11583@infradead.org>
Date:   Tue, 18 Jul 2017 12:18:29 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Alexei Potashnik <alexei@...estorage.com>
Cc:     tj@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] workqueue: doc change for ST behavior on NUMA systems

On Tue, Jul 18, 2017 at 11:12:53AM -0700, Alexei Potashnik wrote:
> NUMA rework of workqueue made the combination of max_active of 1 and
> WQ_UNBOUND insufficient to guarantee ST behavior system wide.
> 
> alloc_ordered_queue should now be used instead.

Eww.  And how many existing users might be broken by that?