linux-kernel - Re: [PATCH v5 06/22] cachefiles: implement on-demand read

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Message-ID: <1029512.1647871543@warthog.procyon.org.uk>
Date:   Mon, 21 Mar 2022 14:05:43 +0000
From:   David Howells <dhowells@...hat.com>
To:     Jeffle Xu <jefflexu@...ux.alibaba.com>
Cc:     dhowells@...hat.com, linux-cachefs@...hat.com, xiang@...nel.org,
        chao@...nel.org, linux-erofs@...ts.ozlabs.org,
        torvalds@...ux-foundation.org, gregkh@...uxfoundation.org,
        willy@...radead.org, linux-fsdevel@...r.kernel.org,
        joseph.qi@...ux.alibaba.com, bo.liu@...ux.alibaba.com,
        tao.peng@...ux.alibaba.com, gerry@...ux.alibaba.com,
        eguan@...ux.alibaba.com, linux-kernel@...r.kernel.org,
        luodaowen.backend@...edance.com
Subject: Re: [PATCH v5 06/22] cachefiles: implement on-demand read

Jeffle Xu <jefflexu@...ux.alibaba.com> wrote:

> +	{ "cread",	cachefiles_ondemand_cread	},

Rather than adding the cread command, would it be better to use an ioctl on
the anon fd as the /dev/cachefiles write op is serialised?

> +	/* Stop enqueuig request when daemon closes anon_fd prematurely. */

"Enqueuing"

David