linux-kernel - Re: [RFC PATCH 11/53] netfs: Add support for DIO buffering

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Message-ID: <1722479.1700252425@warthog.procyon.org.uk>
Date:   Fri, 17 Nov 2023 20:20:25 +0000
From:   David Howells <dhowells@...hat.com>
To:     Jeff Layton <jlayton@...nel.org>
Cc:     dhowells@...hat.com, Steve French <smfrench@...il.com>,
        Matthew Wilcox <willy@...radead.org>,
        Marc Dionne <marc.dionne@...istor.com>,
        Paulo Alcantara <pc@...guebit.com>,
        Shyam Prasad N <sprasad@...rosoft.com>,
        Tom Talpey <tom@...pey.com>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        Ilya Dryomov <idryomov@...il.com>,
        Christian Brauner <christian@...uner.io>,
        linux-afs@...ts.infradead.org, linux-cifs@...r.kernel.org,
        linux-nfs@...r.kernel.org, ceph-devel@...r.kernel.org,
        v9fs@...ts.linux.dev, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-cachefs@...hat.com
Subject: Re: [RFC PATCH 11/53] netfs: Add support for DIO buffering

Jeff Layton <jlayton@...nel.org> wrote:

> > +	struct bio_vec		*direct_bv;	/* DIO buffer list (when handling iovec-iter) */
> >  	void			*netfs_priv;	/* Private data for the netfs */
> > +	unsigned int		direct_bv_count; /* Number of elements in bv[] */
> 
> nit: "number of elements in direct_bv[]"
> 
> Also, just for better readability, can you swap direct_bv and
> netfs_priv? Then at least the array and count are together.

Yeah - and stick a __counted_by() on too.

David