Thanks the useful info.
Could you please try the appended patch (just to rule out a similar
issue we found recently)?
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 947f42a..66637bd 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -283,6 +283,8 @@ unsigned long __init_refok init_memory_mapping(unsigned
long start,
if (!after_bootmem && !start) {
pud_t *pud;
pmd_t *pmd;
+ unsigned long addr;
+ u64 size, memblock_addr;
mmu_cr4_features = read_cr4();
@@ -291,11 +293,18 @@ unsigned long __init_refok init_memory_mapping(unsigned
long start,
* located on different 2M pages. cleanup_highmap(), however,
* can only consider _end when it runs, so destroy any
* mappings beyond _brk_end here.
+ * Respect memblock reserved regions.
*/
pud = pud_offset(pgd_offset_k(_brk_end), _brk_end);
pmd = pmd_offset(pud, _brk_end - 1);
- while (++pmd <= pmd_offset(pud, (unsigned long)_end - 1))
- pmd_clear(pmd);
+ addr = (_brk_end + PMD_SIZE - 1) & PMD_MASK;
+ while (++pmd <= pmd_offset(pud, (unsigned long)_end - 1)) {
+ memblock_addr =
memblock_x86_find_in_range_size(__pa(addr),
+ &size, PMD_SIZE);
+ if (memblock_addr == (u64) __pa(addr) && size >=
PMD_SIZE)
+ pmd_clear(pmd);
+ addr += PMD_SIZE;
+ }
}
#endif
__flush_tlb_all();
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