Messages in this thread Patch in this message | | | From | Kaihao Bai <> | Subject | [PATCH 1/2] kexec: accumulate kexec_crash_size if crashk_low_res defined | Date | Mon, 4 Jul 2022 19:41:34 +0800 |
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Currently x86 and arm64 support to reserve low memory range for crashkernel. When crashkernel=Y,low is defined, the main kernel would reserve another memblock (instead of crashkernel=X,high, which stored in crashk_res) for crashkernel and store it in crashk_low_res. But the value of /sys/kernel/kexec_crash_size only calculates the size of crashk_res size is not calculated.
To ensure the consistency of /sys/kernel/kexec_crash_size, when crashk_low_res is defined, its size needs to be accumulated to kexec_crash_size.
Signed-off-by: Kaihao Bai <carlo.bai@linux.alibaba.com> --- kernel/kexec_core.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index 4d34c78..137f6eb 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -1016,6 +1016,8 @@ size_t crash_get_memory_size(void) mutex_lock(&kexec_mutex); if (crashk_res.end != crashk_res.start) size = resource_size(&crashk_res); + if (crashk_low_res.end != crashk_low_res.start) + size += resource_size(&crashk_low_res); mutex_unlock(&kexec_mutex); return size; } -- 1.8.3.1
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