linux-kernel - Re: ext4 corruption on alpha with 4.20.0-09062-gd8372ba8ce28

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Date:   Wed, 20 Feb 2019 08:31:05 +0200
From:   Meelis Roos <mroos@...ux.ee>
To:     Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.cz>
Cc:     "Theodore Y. Ts'o" <tytso@....edu>, linux-alpha@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>, linux-block@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: ext4 corruption on alpha with 4.20.0-09062-gd8372ba8ce28

> Could
> https://lore.kernel.org/linux-mm/20190219123212.29838-1-larper@axis.com/T/#u
> be relevant?

Tried it, still broken.

I wrote:

> But my kernel config had memory compaction (that turned on page migration) and
> bounce buffers. I do not remember why I found them necessary but I will try
> without them. 

First, I found out that both the problematic alphas had memory compaction and
page migration and bounce buffers turned on, and working alphas had them off.

Next, turing off these options makes the problematic alphas work.

-- 
Meelis Roos <mroos@...ux.ee>