[PATCH v5 8/8] crash_core: skip MEMBLOCK_NODUMP regions when building vmcore ELF header
Wandun Chen <[email protected]>
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From: Wandun Chen <[email protected]> Reserve regions (for GPU, DSP, ...) carry no data useful for crash analysis. Exclude MEMBLOCK_NODUMP regions from the vmcore ELF header to reduce vmcore size and capture time. crash_should_skip_region() now also returns true for MEMBLOCK_NODUMP. Signed-off-by: Wandun Chen <[email protected]> Tested-by: Meijing Zhao <[email protected]> --- kernel/crash_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/crash_core.c b/kernel/crash_core.c index fb78b7814f18..8cc9d666bc54 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -269,10 +269,10 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, return 0; } -/* Exclude NOMAP regions from the vmcore. */ +/* Exclude NOMAP and NODUMP regions from the vmcore. */ static bool crash_should_skip_region(struct memblock_region *reg) { - return memblock_is_nomap(reg); + return memblock_is_nomap(reg) || memblock_is_nodump(reg); } static struct crash_mem *alloc_cmem(unsigned int nr_ranges) -- 2.43.0