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From: Christoph Hellwig <hch@lst.de>
To: 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: [PATCH 13/13] mm: hide the FRONTSWAP Kconfig symbol
Date: Fri, 24 Dec 2021 07:22:46 +0100	[thread overview]
Message-ID: <20211224062246.1258487-14-hch@lst.de> (raw)
In-Reply-To: <20211224062246.1258487-1-hch@lst.de>

Select FRONTSWAP from ZSWAP instead of prompting for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 mm/Kconfig | 18 +++---------------
 1 file changed, 3 insertions(+), 15 deletions(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index 430240289b02b..3326ee3903f33 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -445,20 +445,7 @@ config HAVE_SETUP_PER_CPU_AREA
 	bool
 
 config FRONTSWAP
-	bool "Enable frontswap to cache swap pages if tmem is present"
-	depends on SWAP
-	help
-	  Frontswap is so named because it can be thought of as the opposite
-	  of a "backing" store for a swap device.  The data is stored into
-	  "transcendent memory", memory that is not directly accessible or
-	  addressable by the kernel and is of unknown and possibly
-	  time-varying size.  When space in transcendent memory is available,
-	  a significant swap I/O reduction may be achieved.  When none is
-	  available, all frontswap calls are reduced to a single pointer-
-	  compare-against-NULL resulting in a negligible performance hit
-	  and swap data is stored as normal on the matching swap device.
-
-	  If unsure, say Y to enable frontswap.
+	bool
 
 config CMA
 	bool "Contiguous Memory Allocator"
@@ -523,7 +510,8 @@ config MEM_SOFT_DIRTY
 
 config ZSWAP
 	bool "Compressed cache for swap pages (EXPERIMENTAL)"
-	depends on FRONTSWAP && CRYPTO=y
+	depends on SWAP && CRYPTO=y
+	select FRONTSWAP
 	select ZPOOL
 	help
 	  A lightweight compressed cache for swap pages.  It takes
-- 
2.30.2


  parent reply	other threads:[~2021-12-24  6:23 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-24  6:22 remove Xen tmem leftovers 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 ` Christoph Hellwig [this message]
2022-01-04 14:31 ` remove Xen tmem leftovers David Hildenbrand
2022-01-04 14:46   ` Christoph Hellwig
2022-01-05  6:08   ` Juergen Gross
2022-01-05  8:46     ` David Hildenbrand
2022-01-05 19:36       ` Konrad Rzeszutek Wilk

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