diff options
| author | Jiri Bohac <jbohac@suse.cz> | 2025-06-12 12:16:39 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-19 19:08:23 -0700 |
| commit | ab475510e0422bb5672d465f9d0f523d72fdb7f1 (patch) | |
| tree | 4b8674dc85cf5c44d7a0665cf32dd0ae45b6681a /include/linux/crash_reserve.h | |
| parent | 35c18f2933c596b4fd6a98baee36f3137d133a5f (diff) | |
kdump: implement reserve_crashkernel_cma
reserve_crashkernel_cma() reserves CMA ranges for the crash kernel. If
allocating the requested size fails, try to reserve in smaller blocks.
Store the reserved ranges in the crashk_cma_ranges array and the number of
ranges in crashk_cma_cnt.
Link: https://lkml.kernel.org/r/aEqpBwOy_ekm0gw9@dwarf.suse.cz
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Cc: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Donald Dutile <ddutile@redhat.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Philipp Rudo <prudo@redhat.com>
Cc: Pingfan Liu <piliu@redhat.com>
Cc: Tao Liu <ltao@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/crash_reserve.h')
| -rw-r--r-- | include/linux/crash_reserve.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/crash_reserve.h b/include/linux/crash_reserve.h index e784aaff2f5a..7b44b41d0a20 100644 --- a/include/linux/crash_reserve.h +++ b/include/linux/crash_reserve.h @@ -13,12 +13,24 @@ */ extern struct resource crashk_res; extern struct resource crashk_low_res; +extern struct range crashk_cma_ranges[]; +#if defined(CONFIG_CMA) && defined(CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION) +#define CRASHKERNEL_CMA +#define CRASHKERNEL_CMA_RANGES_MAX 4 +extern int crashk_cma_cnt; +#else +#define crashk_cma_cnt 0 +#define CRASHKERNEL_CMA_RANGES_MAX 0 +#endif + int __init parse_crashkernel(char *cmdline, unsigned long long system_ram, unsigned long long *crash_size, unsigned long long *crash_base, unsigned long long *low_size, unsigned long long *cma_size, bool *high); +void __init reserve_crashkernel_cma(unsigned long long cma_size); + #ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION #ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE #define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20) |