From: Juergen Gross <jgross@suse.com>
To: David Hildenbrand <david@redhat.com>,
Christoph Hellwig <hch@lst.de>,
Andrew Morton <akpm@linux-foundation.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Hugh Dickins <hughd@google.com>,
Seth Jennings <sjenning@redhat.com>,
Dan Streetman <ddstreet@ieee.org>,
Vitaly Wool <vitaly.wool@konsulko.com>,
Matthew Wilcox <willy@infradead.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: remove Xen tmem leftovers
Date: Wed, 5 Jan 2022 07:08:12 +0100 [thread overview]
Message-ID: <82dbdc2c-20c2-d69b-bdc9-efc54939d54c@suse.com> (raw)
In-Reply-To: <10ec73d4-6658-4f60-abe1-84ece53ca373@redhat.com>
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On 04.01.22 15:31, David Hildenbrand wrote:
> On 24.12.21 07:22, Christoph Hellwig wrote:
>> Hi all,
>>
>> since the remove of the Xen tmem driver in 2019, the cleancache hooks are
>> entirely unused, as are large parts of frontswap. This series against
>> linux-next (with the folio changes included) removes cleancaches, and cuts
>> down frontswap to the bits actually used by zswap.
>>
>
> Just out of curiosity, why was tmem removed from Linux (or even Xen?).
> Do you have any information?
tmem never made it past the "experimental" state in the Xen hypervisor.
Its implementation had some significant security flaws, there was no
maintainer left, and nobody stepped up to address those issues.
As a result tmem was removed from Xen.
Juergen
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next prev parent reply other threads:[~2022-01-05 6:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-24 6:22 Christoph Hellwig
2021-12-24 6:22 ` [PATCH 01/13] mm: remove cleancache Christoph Hellwig
2021-12-24 7:01 ` Juergen Gross
2021-12-24 7:02 ` Christoph Hellwig
2021-12-25 10:35 ` Geert Uytterhoeven
2021-12-24 6:22 ` [PATCH 02/13] frontswap: remove frontswap_writethrough Christoph Hellwig
2021-12-24 6:22 ` [PATCH 03/13] frontswap: remove frontswap_tmem_exclusive_gets Christoph Hellwig
2021-12-24 6:22 ` [PATCH 04/13] frontswap: remove frontswap_shrink Christoph Hellwig
2021-12-24 6:22 ` [PATCH 05/13] frontswap: remove frontswap_curr_pages Christoph Hellwig
2021-12-24 6:22 ` [PATCH 06/13] frontswap: simplify frontswap_init Christoph Hellwig
2021-12-24 6:22 ` [PATCH 07/13] frontswap: remove the frontswap exports Christoph Hellwig
2021-12-24 6:22 ` [PATCH 08/13] mm: simplify try_to_unuse Christoph Hellwig
2021-12-24 6:22 ` [PATCH 09/13] frontswap: remove frontswap_test Christoph Hellwig
2021-12-24 6:22 ` [PATCH 10/13] frontswap: simplify frontswap_register_ops Christoph Hellwig
2021-12-24 6:22 ` [PATCH 11/13] mm: mark swap_lock and swap_active_head static Christoph Hellwig
2021-12-24 6:22 ` [PATCH 12/13] frontswap: remove support for multiple ops Christoph Hellwig
2021-12-24 6:22 ` [PATCH 13/13] mm: hide the FRONTSWAP Kconfig symbol Christoph Hellwig
[not found] ` <10ec73d4-6658-4f60-abe1-84ece53ca373@redhat.com>
2022-01-04 14:46 ` remove Xen tmem leftovers Christoph Hellwig
2022-01-05 6:08 ` Juergen Gross [this message]
2022-01-05 8:46 ` David Hildenbrand
2022-01-05 19:36 ` Konrad Rzeszutek Wilk
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