From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Date: Mon, 21 Mar 2016 08:28:45 -0700
From: Christoph Hellwig <hch@infradead.org>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Richard Weinberger <richard@nod.at>,
	Christoph Hellwig <hch@infradead.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Boris Brezillon <boris.brezillon@free-electrons.com>,
	Maxime Ripard <maxime.ripard@free-electrons.com>,
	David Gstir <david@sigma-star.at>,
	Dave Chinner <david@fromorbit.com>,
	Artem Bityutskiy <dedekind1@gmail.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Alexander Kaplan <alex@nextthing.co>
Subject: Re: Page migration issue with UBIFS
Message-ID: <20160321152845.GA17864@infradead.org>
References: <56E8192B.5030008@nod.at>
 <20160315151727.GA16462@node.shutemov.name>
 <56E82B18.9040807@nod.at>
 <20160315153744.GB28522@infradead.org>
 <56E8985A.1020509@nod.at>
 <20160316142156.GA23595@node.shutemov.name>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20160316142156.GA23595@node.shutemov.name>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-fsdevel.vger.kernel.org>

On Wed, Mar 16, 2016 at 05:21:56PM +0300, Kirill A. Shutemov wrote:
> > FYI, with a dummy ->migratepage() which returns only -EINVAL UBIFS does no
> > longer explode upon page migration.
> > Tomorrow I'll do more tests to make sure.
> 
> Could you check if something like this would fix the issue.
> Completely untested.

We really need to make the default safe for file systems that don't
have a migratepage method.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>