linux-kernel - Re: [PATCH] mm: Allow GFP_IOFS for page_cache

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Message-ID: <20151127170522.GL2493@dhcp22.suse.cz>
Date:	Fri, 27 Nov 2015 18:05:22 +0100
From:	Michal Hocko <mhocko@...nel.org>
To:	Vlastimil Babka <vbabka@...e.cz>
Cc:	Jan Kara <jack@...e.cz>, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Mel Gorman <mgorman@...e.de>,
	Dave Chinner <david@...morbit.com>,
	Mark Fasheh <mfasheh@...e.com>, ocfs2-devel@....oracle.com,
	ceph-devel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: Allow GFP_IOFS for page_cache_read page cache
 allocation

On Fri 27-11-15 17:40:41, Vlastimil Babka wrote:
> On 11/26/2015 04:08 PM, Michal Hocko wrote:
> >On Thu 12-11-15 10:53:01, Jan Kara wrote:
> >>On Wed 11-11-15 15:13:53, mhocko@...nel.org wrote:
> >>>
> >>>Hi,
> >>>this has been posted previously as a part of larger GFP_NOFS related
> >>>patch set (http://lkml.kernel.org/r/1438768284-30927-1-git-send-email-mhocko%40kernel.org)
> >>>but I think it makes sense to discuss it even out of that scope.
> >>>
> >>>I would like to hear FS and other MM people about the proposed interface.
> >>>Using mapping_gfp_mask blindly doesn't sound good to me and vm_fault
> >>>looks like a proper channel to communicate between MM and FS layers.
> >>>
> >>>Comments? Are there any better ideas?
> >>
> >>Makes sense to me and the filesystems I know should be fine with this
> >>(famous last words ;). Feel free to add:
> >>
> >>Acked-by: Jan Kara <jack@...e.com>
> >
> >Thanks a lot! Are there any objections from other fs/mm people?
> 
> Please replace "GFP_IOFS" in the subject, as the "flag" has been removed
> recently. Otherwise

Done.
mm: Allow GFP_{FS,IO} for page_cache_read page cache allocation

> Acked-by: Vlastimil Babka <vbabka@...e.cz>

Thanks

-- 
Michal Hocko
SUSE Labs
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