linux-kernel - Re: [RFC PATCH] mm: introduce kv[mz]alloc helpers

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Message-ID: <20161221084505.GA31118@dhcp22.suse.cz>
Date:   Wed, 21 Dec 2016 09:45:06 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Joe Perches <joe@...ches.com>, linux-mm@...ck.org,
        Vlastimil Babka <vbabka@...e.cz>,
        David Rientjes <rientjes@...gle.com>,
        Mel Gorman <mgorman@...e.de>,
        Johannes Weiner <hannes@...xchg.org>,
        Anatoly Stepanov <astepanov@...udlinux.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Theodore Ts'o <tytso@....edu>, kvm@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-security-module@...r.kernel.org,
        Dave Chinner <david@...morbit.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Mikulas Patocka <mpatocka@...hat.com>
Subject: Re: [RFC PATCH] mm: introduce kv[mz]alloc helpers

It seems that this email didn't get delivered due to some stupid gmail
spam policy. Let me try to repost via a different relay. Sorry to those
who have seen the original message and get a duplicate now.

On Wed 21-12-16 08:03:53, Michal Hocko wrote:
> On Tue 20-12-16 14:13:41, Andrew Morton wrote:
> > On Tue, 20 Dec 2016 09:38:22 -0800 Joe Perches <joe@...ches.com> wrote:
> > 
> > > > So what are we going to do about this patch?
> > > 
> > > Well if Andrew doesn't object again, it should probably be applied.
> > > Unless his silence here acts like a pocket-veto.
> > > 
> > > Andrew?  Anything to add?
> > 
> > I guess we should give in to reality and do this, or something like it.
> > But Al said he was going to dig out some patches for us to consider?
> 
> Al wanted to cover vmalloc GFP_NOFS context _inside_ the vmalloc
> code.  This is mostly orthogonal to this patch I believe. Besides
> that I _think_ that it would be better to convert those vmalloc(NOFS)
> users to the scope api rather than tweak the vmalloc. One reason to go
> that way is that those vmalloc(NOFS) users need to be checked anyway
> and something tells me that some of them can really be changed to
> GFP_KERNEL.
> 
> This helper is clear about its gfp mask expectation and complain loudly
> if somebody wants something unexpected which is a good start I believe.
> -- 
> Michal Hocko
> SUSE Labs

-- 
Michal Hocko
SUSE Labs