From: kernel test robot <lkp@intel.com>
To: Emerson Busson <emersonbusson@gmail.com>, mhklinux@outlook.com
Cc: oe-kbuild-all@lists.linux.dev, kys@microsoft.com,
haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [PATCH v2 10/14] hv: vmbus: pin buffer pages across UIO mmap to close the reclaim race
Date: Fri, 9 Oct 2026 01:02:31 +0800 [thread overview]
Message-ID: <202610090020.wViiihcQ-lkp@intel.com> (raw)
In-Reply-To: <20261007190752.336426-11-emersonbusson@gmail.com>
Hi Emerson,
kernel test robot noticed the following build warnings:
[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on char-misc/char-misc-next char-misc/char-misc-linus linus/master v7.3-rc6 next-20261008]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Emerson-Busson/hv-vmbus-convert-ring-backing-through-the-chunk-allocator/20261007-160739
base: char-misc/char-misc-testing
patch link: https://lore.kernel.org/r/20261007190752.336426-11-emersonbusson%40gmail.com
patch subject: [PATCH v2 10/14] hv: vmbus: pin buffer pages across UIO mmap to close the reclaim race
config: i386-randconfig-1013-20261008 (https://download.01.org/0day-ci/archive/20261009/202610090020.wViiihcQ-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/20261009/202610090020.wViiihcQ-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/202610090020.wViiihcQ-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from include/linux/dev_printk.h:14,
from include/linux/device.h:15,
from drivers/uio/uio_hv_generic.c:22:
drivers/uio/uio_hv_generic_mmap_test.c: In function 'hv_uio_ring_mmap_range_test':
>> include/linux/limits.h:25:25: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '18446744073709551615' to '4294967295' [-Woverflow]
25 | #define U64_MAX ((u64)~0ULL)
| ^~~~~~~~~~~~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
include/kunit/test.h:810:9: note: in expansion of macro 'KUNIT_UNARY_ASSERTION'
810 | KUNIT_UNARY_ASSERTION(test, \
| ^~~~~~~~~~~~~~~~~~~~~
include/kunit/test.h:1017:9: note: in expansion of macro 'KUNIT_FALSE_MSG_ASSERTION'
1017 | KUNIT_FALSE_MSG_ASSERTION(test, \
| ^~~~~~~~~~~~~~~~~~~~~~~~~
include/kunit/test.h:1014:9: note: in expansion of macro 'KUNIT_EXPECT_FALSE_MSG'
1014 | KUNIT_EXPECT_FALSE_MSG(test, condition, NULL)
| ^~~~~~~~~~~~~~~~~~~~~~
drivers/uio/uio_hv_generic_mmap_test.c:35:9: note: in expansion of macro 'KUNIT_EXPECT_FALSE'
35 | KUNIT_EXPECT_FALSE(test,
| ^~~~~~~~~~~~~~~~~~
drivers/uio/uio_hv_generic_mmap_test.c:36:55: note: in expansion of macro 'U64_MAX'
36 | hv_uio_mmap_range_valid(8, U64_MAX, 1));
| ^~~~~~~
vim +25 include/linux/limits.h
3c9d017cc283df Andy Shevchenko 2023-08-04 14
54d50897d544c8 Masahiro Yamada 2019-03-07 15 #define U8_MAX ((u8)~0U)
54d50897d544c8 Masahiro Yamada 2019-03-07 16 #define S8_MAX ((s8)(U8_MAX >> 1))
54d50897d544c8 Masahiro Yamada 2019-03-07 17 #define S8_MIN ((s8)(-S8_MAX - 1))
54d50897d544c8 Masahiro Yamada 2019-03-07 18 #define U16_MAX ((u16)~0U)
54d50897d544c8 Masahiro Yamada 2019-03-07 19 #define S16_MAX ((s16)(U16_MAX >> 1))
54d50897d544c8 Masahiro Yamada 2019-03-07 20 #define S16_MIN ((s16)(-S16_MAX - 1))
54d50897d544c8 Masahiro Yamada 2019-03-07 21 #define U32_MAX ((u32)~0U)
3f50f132d8400e John Fastabend 2020-03-30 22 #define U32_MIN ((u32)0)
54d50897d544c8 Masahiro Yamada 2019-03-07 23 #define S32_MAX ((s32)(U32_MAX >> 1))
54d50897d544c8 Masahiro Yamada 2019-03-07 24 #define S32_MIN ((s32)(-S32_MAX - 1))
54d50897d544c8 Masahiro Yamada 2019-03-07 @25 #define U64_MAX ((u64)~0ULL)
54d50897d544c8 Masahiro Yamada 2019-03-07 26 #define S64_MAX ((s64)(U64_MAX >> 1))
54d50897d544c8 Masahiro Yamada 2019-03-07 27 #define S64_MIN ((s64)(-S64_MAX - 1))
54d50897d544c8 Masahiro Yamada 2019-03-07 28
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2026-10-08 17:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-07 19:07 [PATCH v2 0/14] hv: vmbus: make rings and host-visible buffers survive buddy fragmentation Emerson Busson
2026-10-07 19:07 ` [PATCH v2 01/14] hv: vmbus: convert ring backing through the chunk allocator Emerson Busson
2026-10-07 19:07 ` [PATCH v2 02/14] hv: vmbus: validate chunk buffer allocation and cleanup Emerson Busson
2026-10-08 21:17 ` kernel test robot
2026-10-07 19:07 ` [PATCH v2 03/14] uio: hv_generic: describe buffers for owned allocation Emerson Busson
2026-10-07 19:07 ` [PATCH v2 04/14] hv: vmbus: add KUnit tests for GPADL post failure injection Emerson Busson
2026-10-07 19:07 ` [PATCH v2 05/14] hv: vmbus: add KUnit test for order-zero allocation fallback Emerson Busson
2026-10-07 19:07 ` [PATCH v2 06/14] hv: vmbus: cover all shared-page policy combinations Emerson Busson
2026-10-07 19:07 ` [PATCH v2 07/14] hv: vmbus: distinguish host rescind from local channel unload Emerson Busson
2026-10-07 19:07 ` [PATCH v2 08/14] hv: vmbus: retain backing until ownership and references clear Emerson Busson
2026-10-08 19:09 ` sashiko-bot
2026-10-07 19:07 ` [PATCH v2 09/14] hv: use owned VMBus buffers in NetVSC and UIO Emerson Busson
2026-10-08 19:09 ` sashiko-bot
2026-10-07 19:07 ` [PATCH v2 10/14] hv: vmbus: pin buffer pages across UIO mmap to close the reclaim race Emerson Busson
2026-10-08 16:49 ` kernel test robot
2026-10-08 17:51 ` Nathan Chancellor
2026-10-08 17:02 ` kernel test robot [this message]
2026-10-08 19:09 ` sashiko-bot
2026-10-07 19:07 ` [PATCH v2 11/14] hv: vmbus: vmalloc requestor metadata Emerson Busson
2026-10-08 19:09 ` sashiko-bot
2026-10-07 19:07 ` [PATCH v2 12/14] hv: netvsc: allocate RNDIS request descriptors with kvzalloc_obj() Emerson Busson
2026-10-08 19:09 ` sashiko-bot
2026-10-07 19:07 ` [PATCH v2 13/14] hv: netvsc: handle a NULL request address on empty completions Emerson Busson
2026-10-08 19:09 ` sashiko-bot
2026-10-07 19:07 ` [PATCH v2 14/14] hv: netvsc: use kvzalloc for device state Emerson Busson
2026-10-08 19:09 ` sashiko-bot
2026-10-08 16:55 ` [PATCH v2 0/14] hv: vmbus: make rings and host-visible buffers survive buddy fragmentation Easwar Hariharan
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