[PW_SID:1087860] mm: reduce mmap_lock contention and improve page fault performance by linux-riscv-bot · Pull Request #1845 · linux-riscv/linux

linux-riscv-bot · 2026-04-30T05:51:20Z

PR for series 1087860 applied to workflow__riscv__fixes

Name: mm: reduce mmap_lock contention and improve page fault performance
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1087860
Version: 2

If the current page fault is using the per-VMA lock, and we only released the lock to wait for I/O completion (e.g., using folio_lock()), then when the fault is retried after the I/O completes, it should still qualify for the per-VMA-lock path. Acked-by: Pedro Falcato <pfalcato@suse.de> Tested-by: Wang Lian <wanglian@kylinos.cn> Tested-by: Kunwu Chan <chentao@kylinos.cn> Reviewed-by: Wang Lian <lianux.mm@gmail.com> Reviewed-by: Kunwu Chan <kunwu.chan@gmail.com> Signed-off-by: Oven Liyang <liyangouwen1@oppo.com> Co-developed-by: Barry Song <baohua@kernel.org> Signed-off-by: Barry Song <baohua@kernel.org> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

If the current do_swap_page() took the per-VMA lock and we dropped it only to wait for I/O completion (e.g., use folio_wait_locked()), then when do_swap_page() is retried after the I/O completes, it should still qualify for the per-VMA-lock path. Tested-by: Wang Lian <wanglian@kylinos.cn> Tested-by: Kunwu Chan <chentao@kylinos.cn> Reviewed-by: Wang Lian <lianux.mm@gmail.com> Reviewed-by: Kunwu Chan <kunwu.chan@gmail.com> Signed-off-by: Barry Song (Xiaomi) <baohua@kernel.org> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

folio_lock_or_retry() is effectively only used in mm/memory.c, not in the filemap code. Move it there and make it static. The helper __folio_lock_or_retry() can be folded into folio_lock_or_retry(), allowing it to be removed. Signed-off-by: Barry Song (Xiaomi) <baohua@kernel.org> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

If we are waiting for long I/O to complete, it makes sense to avoid holding locks for too long. However, if the folio is uptodate, we are likely only waiting for a concurrent PTE update to finish. Retrying the entire page fault seems excessive. Signed-off-by: Barry Song (Xiaomi) <baohua@kernel.org> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

…faults For uptodate folios, we are not waiting on I/O. We should be able to acquire the folio lock shortly, so there is no need to drop per-vma locks and perform a full PF retry. Signed-off-by: Barry Song (Xiaomi) <baohua@kernel.org> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

linux-riscv-bot · 2026-04-30T05:57:16Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 140.26 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T06:34:07Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 2208.77 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:24:56Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 3046.59 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:25:23Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 26.08 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:25:52Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 27.04 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:25:56Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 2.59 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:27:26Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 87.97 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:27:28Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.27 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:27:31Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
kdoc
Desc: Detects for kdoc errors
Duration: 1.97 seconds
Result: ERROR
Output:

Checking the tree before the patch
Checking the tree with the patch
Warning: include/linux/mm_types.h:1686 Enum value 'VM_FAULT_RETRY_VMA' not described in enum 'vm_fault_reason'
Warning: include/linux/mm_types.h:1686 Enum value 'VM_FAULT_RETRY_VMA' not described in enum 'vm_fault_reason'
Errors and warnings before: 0 this patch: 2
New warnings added
0a1,2
> Warning: include/linux/mm_types.h:1686 Enum value 'VM_FAULT_RETRY_VMA' not described in enum 'vm_fault_reason'
> Warning: include/linux/mm_types.h:1686 Enum value 'VM_FAULT_RETRY_VMA' not described in enum 'vm_fault_reason'
Per-file breakdown

linux-riscv-bot · 2026-04-30T07:27:33Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
module-param
Desc: Detect module_param changes
Duration: 0.40 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:27:36Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.79 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:27:38Z

Patch 1: "[v2,1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.47 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:30:16Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 141.07 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T07:49:19Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1141.47 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:17:49Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1707.96 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:18:16Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 26.00 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:18:45Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 27.11 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:18:47Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 0.84 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:20:16Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 86.90 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:20:18Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.26 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:20:20Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
kdoc
Desc: Detects for kdoc errors
Duration: 0.96 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:20:22Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
module-param
Desc: Detect module_param changes
Duration: 0.30 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:20:24Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.25 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T08:20:26Z

Patch 2: "[v2,2/5] mm/swapin: Retry swapin by VMA lock if the lock was released for I/O"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.33 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T09:24:15Z

Patch 3: "[v2,3/5] mm: Move folio_lock_or_retry() and drop __folio_lock_or_retry()"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T09:24:17Z

Patch 3: "[v2,3/5] mm: Move folio_lock_or_retry() and drop __folio_lock_or_retry()"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.33 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T09:26:51Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 139.90 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T09:45:49Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1135.84 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:14:02Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1691.73 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:14:30Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 26.03 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:14:59Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 27.40 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:15:02Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 0.80 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:16:30Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 86.74 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:16:32Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.25 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:16:35Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
kdoc
Desc: Detects for kdoc errors
Duration: 0.95 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:16:37Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
module-param
Desc: Detect module_param changes
Duration: 0.26 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:16:39Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:16:40Z

Patch 4: "[v2,4/5] mm: Don't retry page fault if folio is uptodate during swap-in"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.33 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:19:15Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 140.45 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T10:38:15Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1138.20 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:06:34Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1697.02 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:07:01Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 25.80 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:07:30Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 26.89 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:07:33Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 0.80 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:09:02Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 88.11 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:09:04Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.26 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:09:06Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
kdoc
Desc: Detects for kdoc errors
Duration: 0.91 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:09:08Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
module-param
Desc: Detect module_param changes
Duration: 0.28 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:09:10Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-04-30T11:09:12Z

Patch 5: "[v2,5/5] mm/filemap: Avoid retrying page faults on uptodate folios in filemap faults"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.32 seconds
Result: PASS

Linux RISC-V bot and others added 6 commits April 30, 2026 05:50

Adding CI files

94a07a2

linux-riscv-bot force-pushed the workflow__riscv__fixes branch 2 times, most recently from f190ec6 to 2c3b264 Compare May 2, 2026 08:13

linux-riscv-bot closed this May 8, 2026

linux-riscv-bot deleted the pw1087860 branch May 8, 2026 02:14

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