[Crash-utility] Re: [PATCH] arm64: section_size_bits compatible with macro definitions

Hi Kazu, Compatible with google android GKI changes, SECTION_SIZE_BITS = 27 when defined 4K_PAGES or 16K_PAGES. SECTION_SIZE_BITS = 29 when defined 64K_PAGES. Link: https://lore.kernel.org/lkml/15cf9a2359197fee0168f820c5c904650d07939e.161... Link: https://lore.kernel.org/all/43843c5e092bfe3ec4c41e3c8c78a7ee35b69bb0.1611... See: https://cs.android.com/android/_/android/kernel/common/+/673e9ab6b64f9811... Before android-12-gki: crash> help -m | grep section_size_bits section_size_bits: 30 The first PFN error, the physical address should be 0x40000000. crash> kmem -p PAGE PHYSICAL MAPPING INDEX CNT FLAGS ffffffff06e00000 200000000 ffffff80edf4fa12 ffffffff070f3640 1 4000000000002000 private After android-12-gki: crash> help -m | grep section section_size_bits: 27 crash> kmem -p PAGE PHYSICAL MAPPING INDEX CNT FLAGS fffffffeffe00000 40000000 0 0 1 1000 reserved Signed-off-by: chenguanyou <chenguanyou(a)xiaomi.com&gt; --- arm64.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/arm64.c b/arm64.c index e36c723..50e22ea 100644 --- a/arm64.c +++ b/arm64.c @@ -1629,7 +1629,16 @@ arm64_get_section_size_bits(void) if ((ret = get_kernel_config("CONFIG_HOTPLUG_SIZE_BITS", &string)) == IKCONFIG_STR) machdep->section_size_bits = atol(string); } - } + + // arm64: reduce section size for sparsemem + if ((ret = get_kernel_config("CONFIG_ARM64_4K_PAGES", NULL)) == IKCONFIG_Y + || (ret = get_kernel_config("CONFIG_ARM64_16K_PAGES", NULL)) == IKCONFIG_Y) + machdep->section_size_bits = _SECTION_SIZE_BITS_5_12; + // arm64/sparsemem: reduce SECTION_SIZE_BITS + else if ((ret = get_kernel_config("CONFIG_ARM64_64K_PAGES", NULL)) == IKCONFIG_Y) + machdep->section_size_bits = _SECTION_SIZE_BITS_5_12_64K; + + } if (CRASHDEBUG(1)) fprintf(fp, "SECTION_SIZE_BITS: %ld\n", machdep->section_size_bits); -- 2.39.0 Thanks, Guanyou.Chen -- Crash-utility mailing list -- devel(a)lists.crash-utility.osci.io To unsubscribe send an email to devel-leave(a)lists.crash-utility.osci.io https://${domain_name}/admin/lists/devel.lists.crash-utility.osci.io/ Contribution Guidelines: https://github.com/crash-utility/crash/wiki