[PW_SID:1118744] kdump: reduce vmcore size and capture time by linux-riscv-bot · Pull Request #2171 · linux-riscv/linux

linux-riscv-bot · 2026-06-30T10:34:00Z

PR for series 1118744 applied to workflow__riscv__fixes

Name: kdump: reduce vmcore size and capture time
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1118744
Version: 4

…_DUMP=n Prepare for an upcoming change that excludes non-dumpable reserved regions from the kdump vmcore and will call crash_exclude_mem_range() from generic, non-arch code. No functional change. Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

In both fdt_scan_reserved_mem and fdt_scan_reserved_mem_late, there are identical check-related print messages. Consolidate these messages by moving them all into the fdt_scan_reserved_mem function. No functional change. Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

When total_reserved_mem_cnt is 0, there is no /reserved-memory node so fdt_scan_reserved_mem_late() have nothing to do, so return -ENODEV directly from alloc_reserved_mem_array() in this case. No functional change. Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

…rved_mem_late() Prepare for storing /memreserve/ entries in the reserved_mem array. alloc_reserved_mem_array was skipped if the device tree lacks a /reserved-memory node, pointer 'reserved_mem' continues to reference the reserved_mem_array which lives in __initdata, storing /memreserve/ entries into reserved_mem_array would result in metadata loss, and an out-of-bounds memory access will occur if the device tree contains more than MAX_RESERVED_REGIONS /memreserve/ entries. So split alloc_reserved_mem_array() from fdt_scan_reserved_mem_late(), and call alloc_reserved_mem_array() whether or not there is a /reserved-memory node. No functional change. The actual /memreserve/ population is added in a follow-up patch. Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

Add a 'dumpable' flag to struct reserved_mem so the kernel can decide whether a reserved area should be included in the kdump vmcore. Most reserved regions are owned by devices and do not contain data useful for kernel crash analysis, so excluding them by default is the right behaviour. Reusable CMA regions are different: pages in a CMA region are handed back to the buddy allocator and may contain key data for crash analysis, so set dumpable to true in rmem_cma_setup(). Suggested-by: Rob Herring <robh@kernel.org> Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Tested-by: Meijing Zhao <zhaomeijing@lixiang.com> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://lore.kernel.org/all/20260506144542.GA2072596-robh@kernel.org/ Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

/memreserve/ is used by firmware or bootloaders, such regions hold no useful data for crash analysis, they should be excluded from the kdump vmcore, so save /memreserve/ entries into the reserved_mem array for later exclusion. If a /memreserve/ entry overlaps any dumpable reserved region, mark the whole memreserve entry dumpable as well. This may keep slightly more memory in vmcore than strictly necessary, but avoids splitting entries and never drops data that may be useful for crash analysis. Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Tested-by: Meijing Zhao <zhaomeijing@lixiang.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

Add two helpers to exclude non-dumpable regions for arch-specific code. - of_reserved_mem_kdump_nr_ranges() returns the count of regions that are not dumpable. Each excluded region may split an existing crash_mem range into two, so callers use this to calculate crash_mem allocation size. - of_reserved_mem_kdump_exclude() walks reserved_mem[] and calls crash_exclude_mem_range() for every non-dumpable region. Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Tested-by: Meijing Zhao <zhaomeijing@lixiang.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

Reserved memory regions are excluded from vmcore by default unless marked dumpable. Honor the dumpable flag to filter out device firmware regions (e.g., GPU, DSP, modem) reserved via device tree, since they typically contain data not useful for kernel crash analysis and can significantly increase vmcore size. Use of_reserved_mem_kdump_exclude() to perform the exclusion, and pre-size the crash_mem array via of_reserved_mem_kdump_nr_ranges(). Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Tested-by: Meijing Zhao <zhaomeijing@lixiang.com> Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

Apply the same non-dumpable reserved memory filtering to RISC-V kdump as was done for arm64. Use of_reserved_mem_kdump_exclude() to drop flagged regions from the elfcorehdr PT_LOAD segments, and of_reserved_mem_kdump_nr_ranges() to pre-size the crash_mem array. Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

…mcore Apply the same non-dumpable reserved memory filtering to LoongArch kdump as was done for arm64. Use of_reserved_mem_kdump_exclude() to drop flagged regions from the elfcorehdr PT_LOAD segments, and of_reserved_mem_kdump_nr_ranges() to pre-size the crash_mem array. Signed-off-by: Wandun Chen <chenwandun@lixiang.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

linux-riscv-bot · 2026-06-30T10:39:28Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 122.48 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:03:32Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1442.13 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:32:41Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1747.60 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:33:06Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 22.96 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:33:31Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 24.10 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:33:34Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 0.79 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:34:57Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 81.92 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:34:59Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.40 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:35:02Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
kdoc
Desc: Detects for kdoc errors
Duration: 0.99 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:35:04Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
module-param
Desc: Detect module_param changes
Duration: 0.48 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:35:06Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.41 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:35:07Z

Patch 1: "[v4,01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.34 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T11:37:24Z

Patch 2: "[v4,02/10] of: reserved_mem: dedup and relocate reserved-memory messages"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 120.67 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T12:00:57Z

Patch 2: "[v4,02/10] of: reserved_mem: dedup and relocate reserved-memory messages"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1411.23 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T12:29:35Z

Patch 2: "[v4,02/10] of: reserved_mem: dedup and relocate reserved-memory messages"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1716.50 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T12:29:59Z

Patch 2: "[v4,02/10] of: reserved_mem: dedup and relocate reserved-memory messages"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 22.76 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T12:30:25Z

Patch 2: "[v4,02/10] of: reserved_mem: dedup and relocate reserved-memory messages"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 24.20 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T12:30:27Z

Patch 2: "[v4,02/10] of: reserved_mem: dedup and relocate reserved-memory messages"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 0.87 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T12:31:49Z

Patch 2: "[v4,02/10] of: reserved_mem: dedup and relocate reserved-memory messages"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 79.76 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T18:04:55Z

Patch 8: "[v4,08/10] arm64: kdump: exclude non-dumpable reserved memory regions from vmcore"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.22 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T18:04:56Z

Patch 8: "[v4,08/10] arm64: kdump: exclude non-dumpable reserved memory regions from vmcore"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.26 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T18:07:16Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 123.98 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T18:30:42Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1404.19 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T18:59:44Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1740.31 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:00:08Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 22.73 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:00:34Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 24.36 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:00:37Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 0.65 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:02:03Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 84.22 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:02:05Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:02:07Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
kdoc
Desc: Detects for kdoc errors
Duration: 0.78 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:02:09Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
module-param
Desc: Detect module_param changes
Duration: 0.25 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:02:11Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:02:13Z

Patch 9: "[v4,09/10] riscv: kdump: exclude non-dumpable reserved memory regions from vmcore"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.28 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:04:30Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 121.48 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:23:22Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1129.48 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:47:04Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1420.54 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:47:28Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 22.27 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:47:52Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 23.19 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:47:54Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 0.67 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:49:16Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 80.57 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:49:18Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:49:20Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
kdoc
Desc: Detects for kdoc errors
Duration: 0.75 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:49:22Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
module-param
Desc: Detect module_param changes
Duration: 0.25 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:49:24Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-06-30T19:49:26Z

Patch 10: "[v4,10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.28 seconds
Result: PASS

Linux RISC-V bot and others added 11 commits June 25, 2026 20:36

Adding CI files

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linux-riscv-bot force-pushed the workflow__riscv__fixes branch 2 times, most recently from 89be0ce to dc5ff20 Compare July 7, 2026 03:25

linux-riscv-bot closed this Jul 8, 2026

linux-riscv-bot deleted the pw1118744 branch July 8, 2026 01:56

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