Commit ff8b8579 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman

powerpc/mm/hugetlb: Don't panic when we don't find the default huge page size

The generic hugetlbfs code can handle not finding the default huge page
size correctly. With HPAGE_SHIFT = 0 we see in dmesg:

  hugetlbfs: disabling because there are no supported hugepage sizes

bash-4.2# echo 30 > /proc/sys/vm/nr_hugepages
bash: echo: write error: Operation not supported

Fixes: 03bb2d65 ("powerpc: get hugetlbpage handling more generic")
Reported-by: default avatarChris Smart <chris@distroguy.com>
Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent bf5ca68d
...@@ -848,9 +848,6 @@ static int __init hugetlbpage_init(void) ...@@ -848,9 +848,6 @@ static int __init hugetlbpage_init(void)
else if (mmu_psize_defs[MMU_PAGE_2M].shift) else if (mmu_psize_defs[MMU_PAGE_2M].shift)
HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_2M].shift; HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_2M].shift;
#endif #endif
else
panic("%s: Unable to set default huge page size\n", __func__);
return 0; return 0;
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment