linux-ext4 - Re: vmalloc with GFP

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Message-ID: <20180509141333.onn7rbaitzspjmsa@twin.jikos.cz>
Date:   Wed, 9 May 2018 16:13:34 +0200
From:   David Sterba <dsterba@...e.cz>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     "Theodore Y. Ts'o" <tytso@....edu>,
        LKML <linux-kernel@...r.kernel.org>,
        Artem Bityutskiy <dedekind1@...il.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Steven Whitehouse <swhiteho@...hat.com>,
        Bob Peterson <rpeterso@...hat.com>,
        Trond Myklebust <trond.myklebust@...marydata.com>,
        Anna Schumaker <anna.schumaker@...app.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Mikulas Patocka <mpatocka@...hat.com>,
        linux-mtd@...ts.infradead.org, linux-ext4@...r.kernel.org,
        cluster-devel@...hat.com, linux-nfs@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: vmalloc with GFP_NOFS

On Wed, May 09, 2018 at 03:42:22PM +0200, Michal Hocko wrote:
> On Tue 24-04-18 13:25:42, Michal Hocko wrote:
> [...]
> > > As a suggestion, could you take
> > > documentation about how to convert to the memalloc_nofs_{save,restore}
> > > scope api (which I think you've written about e-mails at length
> > > before), and put that into a file in Documentation/core-api?
> > 
> > I can.
> 
> Does something like the below sound reasonable/helpful?

Sounds good to me and matches how we've been using the vmalloc/nofs so
far.