[PW_SID:1126321] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap by linux-riscv-bot · Pull Request #2267 · linux-riscv/linux

linux-riscv-bot · 2026-07-13T07:56:57Z

PR for series 1126321 applied to workflow__riscv__fixes

Name: mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1126321
Version: 6

None of the code relating to mark_new_valid_map() does anything useful without CONFIG_64BIT=y && CONFIG_MMU=y, because the new_valid_map_cpus_check code is only used if CONFIG_64BIT, and the exception codes checked there can only happen with CONFIG_MMU=y. Therefore, make these conditional on CONFIG_64BIT=y && CONFIG_MMU=y to simplify programming, since we do not have to handle CONFIG_MMU=n when changing this code in the future. This also removes some unused code on the entry path for CONFIG_MMU=n. Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

section_activate() does not flush TLB after populating new vmemmap pages. On most architectures, this is okay. However it is a problem on RISC-V since there the TLB caching non-present entries is permitted, which causes spurious faults on some hardwares. This seems to be most easily reproduced with DEBUG_VM=y and PAGE_POISONING=y, which causes these newly mapped struct pages to be poisoned i.e. written to immediately after mapping. Extend the RISC-V flush_cache_vmap() to also handle the vmemmap range, and call it after hotplugging vmemmap, which gets the possible spurious fault handled in the exception handler. At least for now, the only other architecture with both SPARSEMEM_VMEMMAP and flush_cache_vmap() is PowerPC, which has a similar problem with newly valid PTEs. But there flush_cache_vmap() is just a ptesync. So it should be safe to do this for generic code while having minimal performance impact. Suggested-by: Muchun Song <muchun.song@linux.dev> Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn> Reviewed-by: Muchun Song <muchun.song@linux.dev> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

linux-riscv-bot · 2026-07-13T08:02:21Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 121.39 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T08:30:16Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1672.91 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:03:30Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1992.67 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:03:52Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 20.68 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:04:16Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 22.13 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:04:19Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 1.01 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:05:45Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 84.80 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:05:47Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.25 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:05:49Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
kdoc
Desc: Detects for kdoc errors
Duration: 0.76 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:05:51Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
module-param
Desc: Detect module_param changes
Duration: 0.26 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:05:53Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:05:55Z

Patch 1: "[v6,1/2] riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.28 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:08:11Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 120.49 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T09:42:00Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 2026.74 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:25:34Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 2613.14 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:25:56Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 20.63 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:26:20Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 22.22 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:26:24Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 1.85 seconds
Result: WARNING
Output:

WARNING: A patch subject line should describe the change not the tool that found it
#4: 
Subject: [PATCH] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging

total: 0 errors, 1 warnings, 0 checks, 17 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 82dd31bf6524 ("mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 1 warnings, 0 checks, 17 lines checked
WARNING: A patch subject line should describe the change not the tool that found it

linux-riscv-bot · 2026-07-13T10:27:49Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 83.96 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:27:51Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:27:53Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
kdoc
Desc: Detects for kdoc errors
Duration: 0.74 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:27:55Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
module-param
Desc: Detect module_param changes
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:27:57Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.23 seconds
Result: PASS

linux-riscv-bot · 2026-07-13T10:27:58Z

Patch 2: "[v6,2/2] mm/sparse-vmemmap: flush_cache_vmap() after hotplugging vmemmap"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.26 seconds
Result: PASS

Linux RISC-V bot and others added 3 commits July 11, 2026 01:54

Adding CI files

da477a6

linux-riscv-bot force-pushed the workflow__riscv__fixes branch from da477a6 to 869345e Compare July 13, 2026 18:24

linux-riscv-bot closed this Jul 13, 2026

linux-riscv-bot deleted the pw1126321 branch July 13, 2026 18:25

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