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| author | Mike Kravetz <[email protected]> | 2016-02-05 23:36:38 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2016-02-06 02:10:40 +0000 |
| commit | b4330afbed0cdceeba33c4945158c55771047e81 (patch) | |
| tree | 422b578bbf19e4d4c4dea5d742cc4e6dfd000a30 /fs/btrfs/dev-replace.c | |
| parent | mm: downgrade VM_BUG in isolate_lru_page() to warning (diff) | |
| download | kernel-b4330afbed0cdceeba33c4945158c55771047e81.tar.gz kernel-b4330afbed0cdceeba33c4945158c55771047e81.zip | |
mm/hugetlb: fix gigantic page initialization/allocation
Attempting to preallocate 1G gigantic huge pages at boot time with
"hugepagesz=1G hugepages=1" on the kernel command line will prevent
booting with the following:
kernel BUG at mm/hugetlb.c:1218!
When mapcount accounting was reworked, the setting of
compound_mapcount_ptr in prep_compound_gigantic_page was overlooked. As
a result, the validation of mapcount in free_huge_page fails.
The "BUG_ON" checks in free_huge_page were also changed to
"VM_BUG_ON_PAGE" to assist with debugging.
Fixes: 53f9263baba69 ("mm: rework mapcount accounting to enable 4k mapping of THPs")
Signed-off-by: Mike Kravetz <[email protected]>
Signed-off-by: Naoya Horiguchi <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Acked-by: David Rientjes <[email protected]>
Tested-by: Vlastimil Babka <[email protected]>
Cc: "Aneesh Kumar K.V" <[email protected]>
Cc: Jerome Marchand <[email protected]>
Cc: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'fs/btrfs/dev-replace.c')
0 files changed, 0 insertions, 0 deletions