linux-kernel - Re: [PATCH v3] fs/aio: Replace kmap{,_atomic}() with kmap_local

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Message-ID: <ZCHiTYyzBzHFa9xX@moria.home.lan>
Date:   Mon, 27 Mar 2023 14:37:01 -0400
From:   Kent Overstreet <kent.overstreet@...ux.dev>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Benjamin LaHaise <bcrl@...ck.org>,
        linux-fsdevel@...r.kernel.org, linux-aio@...ck.org,
        linux-kernel@...r.kernel.org,
        "Venkataramanan, Anirudh" <anirudh.venkataramanan@...el.com>,
        Ira Weiny <ira.weiny@...el.com>, Jeff Moyer <jmoyer@...hat.com>
Subject: Re: [PATCH v3] fs/aio: Replace kmap{,_atomic}() with
 kmap_local_page()

On Mon, Mar 27, 2023 at 02:22:46PM +0100, Matthew Wilcox wrote:
> Or should we just stop allocating aio rings from HIGHMEM and remove
> the calls to kmap()?  How much memory are we talking about here?

I don't think that should stop us from taking these patches, but yes.