linux-kernel - Re: [RFC][PATCH 00/25] Network fs helper library & fscache kiocb API

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Message-ID: <20210122160129.GB18583@fieldses.org>
Date:   Fri, 22 Jan 2021 11:01:29 -0500
From:   "J. Bruce Fields" <bfields@...ldses.org>
To:     David Howells <dhowells@...hat.com>
Cc:     Trond Myklebust <trondmy@...merspace.com>,
        Anna Schumaker <anna.schumaker@...app.com>,
        Steve French <sfrench@...ba.org>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        Takashi Iwai <tiwai@...e.de>,
        Matthew Wilcox <willy@...radead.org>,
        linux-afs@...ts.infradead.org, Jeff Layton <jlayton@...hat.com>,
        David Wysochanski <dwysocha@...hat.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-cachefs@...hat.com, linux-nfs@...r.kernel.org,
        linux-cifs@...r.kernel.org, ceph-devel@...r.kernel.org,
        v9fs-developer@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 00/25] Network fs helper library & fscache kiocb API

On Thu, Jan 21, 2021 at 08:08:24PM +0000, David Howells wrote:
> J. Bruce Fields <bfields@...ldses.org> wrote:
> > So, I'm still confused: there must be some case where we know fscache
> > actually works reliably and doesn't corrupt your data, right?
> 
> Using ext2/3, for example.  I don't know under what circumstances xfs, ext4
> and btrfs might insert/remove blocks of zeros, but I'm told it can happen.

Do ext2/3 work well for fscache in other ways?

--b.