From: Baolin Wang <baolin.wang@linux.alibaba.com>
To: Lance Yang <ioworker0@gmail.com>
Cc: 21cnbao@gmail.com, akpm@linux-foundation.org, david@redhat.com,
hughd@google.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, ryan.roberts@arm.com, shy828301@gmail.com,
wangkefeng.wang@huawei.com, willy@infradead.org,
ying.huang@intel.com, ziy@nvidia.com
Subject: Re: [PATCH 0/8] add mTHP support for anonymous shmem
Date: Tue, 7 May 2024 09:47:13 +0800 [thread overview]
Message-ID: <eaddd00d-8160-4800-b60f-25280dfe339b@linux.alibaba.com> (raw)
In-Reply-To: <20240506105447.1171-1-ioworker0@gmail.com>
Hi Lance,
On 2024/5/6 18:54, Lance Yang wrote:
> Hey Baolin,
>
> I found a compilation issue that failed one[1] of my configurations
> after applying this series. The error message is as follows:
>
> mm/shmem.c: In function ‘shmem_get_unmapped_area’:
> ././include/linux/compiler_types.h:460:45: error: call to ‘__compiletime_assert_481’ declared with attribute error: BUILD_BUG failed
> _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> ^
> ././include/linux/compiler_types.h:441:25: note: in definition of macro ‘__compiletime_assert’
> prefix ## suffix(); \
> ^~~~~~
> ././include/linux/compiler_types.h:460:9: note: in expansion of macro ‘_compiletime_assert’
> _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> ^~~~~~~~~~~~~~~~~~~
> ./include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’
> #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
> ^~~~~~~~~~~~~~~~~~
> ./include/linux/build_bug.h:59:21: note: in expansion of macro ‘BUILD_BUG_ON_MSG’
> #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
> ^~~~~~~~~~~~~~~~
> ./include/linux/huge_mm.h:97:28: note: in expansion of macro ‘BUILD_BUG’
> #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; })
> ^~~~~~~~~
> ./include/linux/huge_mm.h:104:35: note: in expansion of macro ‘HPAGE_PMD_SHIFT’
> #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT)
> ^~~~~~~~~~~~~~~
> mm/shmem.c:2419:36: note: in expansion of macro ‘HPAGE_PMD_SIZE’
> unsigned long hpage_size = HPAGE_PMD_SIZE;
> ^~~~~~~~~~~~~~~
>
> It seems like we need to handle the case where CONFIG_PGTABLE_HAS_HUGE_LEAVES
> is undefined.
>
> [1] export ARCH=arm64 && make allnoconfig && make olddefconfig && make -j$(nproc)
Thanks for reporting. I can move the use of HPAGE_PMD_SIZE to after the
check for CONFIG_TRANSPARENT_HUGEPAGE, which can avoid the building error:
diff --git a/mm/shmem.c b/mm/shmem.c
index 1af2f0aa384d..d603e36e0f4f 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2416,7 +2416,7 @@ unsigned long shmem_get_unmapped_area(struct file
*file,
unsigned long inflated_len;
unsigned long inflated_addr;
unsigned long inflated_offset;
- unsigned long hpage_size = HPAGE_PMD_SIZE;
+ unsigned long hpage_size;
if (len > TASK_SIZE)
return -ENOMEM;
@@ -2446,6 +2446,7 @@ unsigned long shmem_get_unmapped_area(struct file
*file,
if (uaddr == addr)
return addr;
+ hpage_size = HPAGE_PMD_SIZE;
if (shmem_huge != SHMEM_HUGE_FORCE) {
struct super_block *sb;
unsigned long __maybe_unused hpage_orders;
next prev parent reply other threads:[~2024-05-07 1:47 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-06 8:46 [PATCH 0/8] add mTHP support for anonymous shmem Baolin Wang
2024-05-06 8:46 ` [PATCH 1/8] mm: move highest_order() and next_order() out of the THP config Baolin Wang
2024-05-07 10:21 ` Ryan Roberts
2024-05-08 2:13 ` Baolin Wang
2024-05-08 9:06 ` Ryan Roberts
2024-05-08 9:40 ` Baolin Wang
2024-05-06 8:46 ` [PATCH 2/8] mm: memory: extend finish_fault() to support large folio Baolin Wang
2024-05-07 10:37 ` Ryan Roberts
2024-05-08 3:44 ` Baolin Wang
2024-05-08 7:15 ` David Hildenbrand
2024-05-08 9:06 ` Baolin Wang
2024-05-08 8:53 ` Ryan Roberts
2024-05-08 9:31 ` Baolin Wang
2024-05-08 10:47 ` Ryan Roberts
2024-05-09 1:10 ` Baolin Wang
2024-05-06 8:46 ` [PATCH 3/8] mm: shmem: add an 'order' parameter for shmem_alloc_hugefolio() Baolin Wang
2024-05-06 8:46 ` [PATCH 4/8] mm: shmem: add THP validation for PMD-mapped THP related statistics Baolin Wang
2024-05-06 8:46 ` [PATCH 5/8] mm: shmem: add multi-size THP sysfs interface for anonymous shmem Baolin Wang
2024-05-07 10:52 ` Ryan Roberts
2024-05-08 4:45 ` Baolin Wang
2024-05-08 7:08 ` David Hildenbrand
2024-05-08 7:12 ` David Hildenbrand
2024-05-08 9:02 ` Ryan Roberts
2024-05-08 9:56 ` Baolin Wang
2024-05-08 10:48 ` Ryan Roberts
2024-05-08 12:02 ` David Hildenbrand
2024-05-08 12:10 ` David Hildenbrand
2024-05-08 12:43 ` Ryan Roberts
2024-05-08 12:44 ` Ryan Roberts
2024-05-08 12:45 ` David Hildenbrand
2024-05-08 12:54 ` Ryan Roberts
2024-05-08 13:07 ` David Hildenbrand
2024-05-08 13:44 ` Ryan Roberts
2024-05-06 8:46 ` [PATCH 6/8] mm: shmem: add mTHP support " Baolin Wang
2024-05-07 10:46 ` kernel test robot
2024-05-08 6:03 ` Baolin Wang
2024-05-06 8:46 ` [PATCH 7/8] mm: shmem: add mTHP size alignment in shmem_get_unmapped_area Baolin Wang
2024-05-06 8:46 ` [PATCH 8/8] mm: shmem: add mTHP counters for anonymous shmem Baolin Wang
2024-05-06 10:54 ` [PATCH 0/8] add mTHP support " Lance Yang
2024-05-07 1:47 ` Baolin Wang [this message]
2024-05-07 6:50 ` Lance Yang
2024-05-07 10:20 ` Ryan Roberts
2024-05-08 5:45 ` Baolin Wang
[not found] ` <CGME20240508113934eucas1p13a3972f3f9955365f40155e084a7c7d5@eucas1p1.samsung.com>
2024-05-08 11:39 ` Daniel Gomez
2024-05-08 11:58 ` David Hildenbrand
2024-05-08 14:28 ` Daniel Gomez
2024-05-08 17:03 ` David Hildenbrand
2024-05-09 19:18 ` Daniel Gomez
2024-05-09 3:08 ` Baolin Wang
2024-05-08 19:23 ` Luis Chamberlain
2024-05-09 17:48 ` David Hildenbrand
2024-05-10 18:53 ` Luis Chamberlain
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