From: kernel test robot <lkp@intel.com>
To: Nhat Pham <nphamcs@gmail.com>, linux-mm@kvack.org
Cc: oe-kbuild-all@lists.linux.dev, akpm@linux-foundation.org,
hannes@cmpxchg.org, hughd@google.com, yosry.ahmed@linux.dev,
mhocko@kernel.org, roman.gushchin@linux.dev,
shakeel.butt@linux.dev, muchun.song@linux.dev,
len.brown@intel.com, chengming.zhou@linux.dev,
kasong@tencent.com, chrisl@kernel.org,
huang.ying.caritas@gmail.com, ryan.roberts@arm.com,
shikemeng@huaweicloud.com, viro@zeniv.linux.org.uk,
baohua@kernel.org, bhe@redhat.com, osalvador@suse.de,
lorenzo.stoakes@oracle.com, christophe.leroy@csgroup.eu,
pavel@kernel.org, kernel-team@meta.com,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
linux-pm@vger.kernel.org, peterx@redhat.com, riel@surriel.com,
joshua.hahnjy@gmail.com
Subject: Re: [PATCH v3 09/20] mm: swap: allocate a virtual swap slot for each swapped out page
Date: Wed, 11 Feb 2026 14:42:24 +0100 [thread overview]
Message-ID: <202602111445.rP38hmwx-lkp@intel.com> (raw)
In-Reply-To: <20260208215839.87595-10-nphamcs@gmail.com>
Hi Nhat,
kernel test robot noticed the following build errors:
[auto build test ERROR on 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b]
url: https://github.com/intel-lab-lkp/linux/commits/Nhat-Pham/mm-swap-decouple-swap-cache-from-physical-swap-infrastructure/20260209-120606
base: 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b
patch link: https://lore.kernel.org/r/20260208215839.87595-10-nphamcs%40gmail.com
patch subject: [PATCH v3 09/20] mm: swap: allocate a virtual swap slot for each swapped out page
config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20260211/202602111445.rP38hmwx-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260211/202602111445.rP38hmwx-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602111445.rP38hmwx-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from include/linux/local_lock.h:5,
from include/linux/mmzone.h:24,
from include/linux/gfp.h:7,
from include/linux/mm.h:7,
from mm/vswap.c:7:
mm/vswap.c: In function 'vswap_cpu_dead':
>> include/linux/percpu-defs.h:221:45: error: initialization from pointer to non-enclosed address space
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/local_lock_internal.h:105:40: note: in definition of macro '__local_lock_acquire'
105 | __l = (local_lock_t *)(lock); \
| ^~~~
include/linux/local_lock.h:17:41: note: in expansion of macro '__local_lock'
17 | #define local_lock(lock) __local_lock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
include/linux/local_lock.h:17:54: note: in expansion of macro 'this_cpu_ptr'
17 | #define local_lock(lock) __local_lock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
mm/vswap.c:653:9: note: in expansion of macro 'local_lock'
653 | local_lock(&percpu_cluster->lock);
| ^~~~~~~~~~
include/linux/percpu-defs.h:221:45: note: expected 'const __seg_gs void *' but pointer is of type 'local_lock_t *'
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/local_lock_internal.h:105:40: note: in definition of macro '__local_lock_acquire'
105 | __l = (local_lock_t *)(lock); \
| ^~~~
include/linux/local_lock.h:17:41: note: in expansion of macro '__local_lock'
17 | #define local_lock(lock) __local_lock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
include/linux/local_lock.h:17:54: note: in expansion of macro 'this_cpu_ptr'
17 | #define local_lock(lock) __local_lock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
mm/vswap.c:653:9: note: in expansion of macro 'local_lock'
653 | local_lock(&percpu_cluster->lock);
| ^~~~~~~~~~
>> include/linux/percpu-defs.h:221:45: error: initialization from pointer to non-enclosed address space
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/local_lock_internal.h:107:27: note: in definition of macro '__local_lock_acquire'
107 | _Generic((lock), \
| ^~~~
include/linux/local_lock.h:17:41: note: in expansion of macro '__local_lock'
17 | #define local_lock(lock) __local_lock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
include/linux/local_lock.h:17:54: note: in expansion of macro 'this_cpu_ptr'
17 | #define local_lock(lock) __local_lock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
mm/vswap.c:653:9: note: in expansion of macro 'local_lock'
653 | local_lock(&percpu_cluster->lock);
| ^~~~~~~~~~
include/linux/percpu-defs.h:221:45: note: expected 'const __seg_gs void *' but pointer is of type 'local_lock_t *'
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/local_lock_internal.h:107:27: note: in definition of macro '__local_lock_acquire'
107 | _Generic((lock), \
| ^~~~
include/linux/local_lock.h:17:41: note: in expansion of macro '__local_lock'
17 | #define local_lock(lock) __local_lock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
include/linux/local_lock.h:17:54: note: in expansion of macro 'this_cpu_ptr'
17 | #define local_lock(lock) __local_lock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
mm/vswap.c:653:9: note: in expansion of macro 'local_lock'
653 | local_lock(&percpu_cluster->lock);
| ^~~~~~~~~~
>> include/linux/percpu-defs.h:221:45: error: initialization from pointer to non-enclosed address space
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/local_lock_internal.h:176:40: note: in definition of macro '__local_lock_release'
176 | __l = (local_lock_t *)(lock); \
| ^~~~
include/linux/local_lock.h:38:41: note: in expansion of macro '__local_unlock'
38 | #define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~~~
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
include/linux/local_lock.h:38:56: note: in expansion of macro 'this_cpu_ptr'
38 | #define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
mm/vswap.c:665:9: note: in expansion of macro 'local_unlock'
665 | local_unlock(&percpu_cluster->lock);
| ^~~~~~~~~~~~
include/linux/percpu-defs.h:221:45: note: expected 'const __seg_gs void *' but pointer is of type 'local_lock_t *'
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/local_lock_internal.h:176:40: note: in definition of macro '__local_lock_release'
176 | __l = (local_lock_t *)(lock); \
| ^~~~
include/linux/local_lock.h:38:41: note: in expansion of macro '__local_unlock'
38 | #define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~~~
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
include/linux/local_lock.h:38:56: note: in expansion of macro 'this_cpu_ptr'
38 | #define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
mm/vswap.c:665:9: note: in expansion of macro 'local_unlock'
665 | local_unlock(&percpu_cluster->lock);
| ^~~~~~~~~~~~
>> include/linux/percpu-defs.h:221:45: error: initialization from pointer to non-enclosed address space
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/local_lock_internal.h:179:27: note: in definition of macro '__local_lock_release'
179 | _Generic((lock), \
| ^~~~
include/linux/local_lock.h:38:41: note: in expansion of macro '__local_unlock'
38 | #define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~~~
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
include/linux/local_lock.h:38:56: note: in expansion of macro 'this_cpu_ptr'
38 | #define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
mm/vswap.c:665:9: note: in expansion of macro 'local_unlock'
665 | local_unlock(&percpu_cluster->lock);
| ^~~~~~~~~~~~
include/linux/percpu-defs.h:221:45: note: expected 'const __seg_gs void *' but pointer is of type 'local_lock_t *'
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/local_lock_internal.h:179:27: note: in definition of macro '__local_lock_release'
179 | _Generic((lock), \
| ^~~~
include/linux/local_lock.h:38:41: note: in expansion of macro '__local_unlock'
38 | #define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~~~
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
include/linux/local_lock.h:38:56: note: in expansion of macro 'this_cpu_ptr'
38 | #define local_unlock(lock) __local_unlock(this_cpu_ptr(lock))
| ^~~~~~~~~~~~
mm/vswap.c:665:9: note: in expansion of macro 'local_unlock'
665 | local_unlock(&percpu_cluster->lock);
| ^~~~~~~~~~~~
vim +221 include/linux/percpu-defs.h
62fde54123fb64 Tejun Heo 2014-06-17 207
9c28278a24c01c Tejun Heo 2014-06-17 208 /*
6fbc07bbe2b5a8 Tejun Heo 2014-06-17 209 * __verify_pcpu_ptr() verifies @ptr is a percpu pointer without evaluating
6fbc07bbe2b5a8 Tejun Heo 2014-06-17 210 * @ptr and is invoked once before a percpu area is accessed by all
6fbc07bbe2b5a8 Tejun Heo 2014-06-17 211 * accessors and operations. This is performed in the generic part of
6fbc07bbe2b5a8 Tejun Heo 2014-06-17 212 * percpu and arch overrides don't need to worry about it; however, if an
6fbc07bbe2b5a8 Tejun Heo 2014-06-17 213 * arch wants to implement an arch-specific percpu accessor or operation,
6fbc07bbe2b5a8 Tejun Heo 2014-06-17 214 * it may use __verify_pcpu_ptr() to verify the parameters.
9c28278a24c01c Tejun Heo 2014-06-17 215 *
9c28278a24c01c Tejun Heo 2014-06-17 216 * + 0 is required in order to convert the pointer type from a
9c28278a24c01c Tejun Heo 2014-06-17 217 * potential array type to a pointer to a single item of the array.
9c28278a24c01c Tejun Heo 2014-06-17 218 */
eba117889ac444 Tejun Heo 2014-06-17 219 #define __verify_pcpu_ptr(ptr) \
eba117889ac444 Tejun Heo 2014-06-17 220 do { \
9c28278a24c01c Tejun Heo 2014-06-17 @221 const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
9c28278a24c01c Tejun Heo 2014-06-17 222 (void)__vpp_verify; \
9c28278a24c01c Tejun Heo 2014-06-17 223 } while (0)
9c28278a24c01c Tejun Heo 2014-06-17 224
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2026-02-11 13:43 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-08 21:58 [PATCH v3 00/20] Virtual Swap Space Nhat Pham
2026-02-08 21:58 ` [PATCH v3 01/20] mm/swap: decouple swap cache from physical swap infrastructure Nhat Pham
2026-02-08 22:26 ` [PATCH v3 00/20] Virtual Swap Space Nhat Pham
2026-02-10 17:59 ` Kairui Song
2026-02-10 18:52 ` Johannes Weiner
2026-02-10 19:11 ` Nhat Pham
2026-02-10 19:23 ` Nhat Pham
2026-02-12 5:07 ` Chris Li
2026-02-17 23:36 ` Nhat Pham
2026-02-10 21:58 ` Chris Li
2026-02-20 21:05 ` [PATCH] vswap: fix poor batching behavior of vswap free path Nhat Pham
2026-02-08 22:31 ` [PATCH v3 00/20] Virtual Swap Space Nhat Pham
2026-02-09 12:20 ` Chris Li
2026-02-10 2:36 ` Johannes Weiner
2026-02-10 21:24 ` Chris Li
2026-02-10 23:01 ` Johannes Weiner
2026-02-10 18:00 ` Nhat Pham
2026-02-10 23:17 ` Chris Li
2026-02-08 22:39 ` Nhat Pham
2026-02-09 2:22 ` [PATCH v3 01/20] mm/swap: decouple swap cache from physical swap infrastructure kernel test robot
2026-02-08 21:58 ` [PATCH v3 02/20] swap: rearrange the swap header file Nhat Pham
2026-02-08 21:58 ` [PATCH v3 03/20] mm: swap: add an abstract API for locking out swapoff Nhat Pham
2026-02-08 21:58 ` [PATCH v3 04/20] zswap: add new helpers for zswap entry operations Nhat Pham
2026-02-08 21:58 ` [PATCH v3 05/20] mm/swap: add a new function to check if a swap entry is in swap cached Nhat Pham
2026-02-08 21:58 ` [PATCH v3 06/20] mm: swap: add a separate type for physical swap slots Nhat Pham
2026-02-08 21:58 ` [PATCH v3 07/20] mm: create scaffolds for the new virtual swap implementation Nhat Pham
2026-02-08 21:58 ` [PATCH v3 08/20] zswap: prepare zswap for swap virtualization Nhat Pham
2026-02-08 21:58 ` [PATCH v3 09/20] mm: swap: allocate a virtual swap slot for each swapped out page Nhat Pham
2026-02-09 17:12 ` kernel test robot
2026-02-11 13:42 ` kernel test robot [this message]
2026-02-08 21:58 ` [PATCH v3 10/20] swap: move swap cache to virtual swap descriptor Nhat Pham
2026-02-08 21:58 ` [PATCH v3 11/20] zswap: move zswap entry management to the " Nhat Pham
2026-02-08 21:58 ` [PATCH v3 12/20] swap: implement the swap_cgroup API using virtual swap Nhat Pham
2026-02-08 21:58 ` [PATCH v3 13/20] swap: manage swap entry lifecycle at the virtual swap layer Nhat Pham
2026-02-08 21:58 ` [PATCH v3 14/20] mm: swap: decouple virtual swap slot from backing store Nhat Pham
2026-02-08 21:58 ` [PATCH v3 15/20] zswap: do not start zswap shrinker if there is no physical swap slots Nhat Pham
2026-02-08 21:58 ` [PATCH v3 16/20] swap: do not unnecesarily pin readahead swap entries Nhat Pham
2026-02-08 21:58 ` [PATCH v3 17/20] swapfile: remove zeromap bitmap Nhat Pham
2026-02-08 21:58 ` [PATCH v3 18/20] memcg: swap: only charge physical swap slots Nhat Pham
2026-02-09 2:01 ` kernel test robot
2026-02-09 2:12 ` kernel test robot
2026-02-08 21:58 ` [PATCH v3 19/20] swap: simplify swapoff using virtual swap Nhat Pham
2026-02-08 21:58 ` [PATCH v3 20/20] swapfile: replace the swap map with bitmaps Nhat Pham
2026-02-08 22:51 ` [PATCH v3 00/20] Virtual Swap Space Nhat Pham
2026-02-12 12:23 ` David Hildenbrand (Arm)
2026-02-12 17:29 ` Nhat Pham
2026-02-12 17:39 ` Nhat Pham
2026-02-12 20:11 ` David Hildenbrand (Arm)
2026-02-12 17:41 ` David Hildenbrand (Arm)
2026-02-12 17:45 ` Nhat Pham
2026-02-10 15:45 ` [syzbot ci] " syzbot ci
2026-02-25 0:09 ` [PATCH v3 00/20] " Askar Safin
2026-02-25 1:04 ` Askar Safin
-- strict thread matches above, loose matches on Subject: below --
2026-02-09 15:37 [PATCH v3 14/20] mm: swap: decouple virtual swap slot from backing store kernel test robot
2026-02-10 6:31 ` Dan Carpenter
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