Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
mm/hugetlb: avoid soft lockup in set_max_huge_pages()
In powerpc servers with large memory(32TB), we watched several soft lockups for hugepage under stress tests. The call traces are as follows: 1. get_page_from_freelist+0x2d8/0xd50 __alloc_pages_nodemask+0x180/0xc20 alloc_fresh_huge_page+0xb0/0x190 set_max_huge_pages+0x164/0x3b0 2. prep_new_huge_page+0x5c/0x100 alloc_fresh_huge_page+0xc8/0x190 set_max_huge_pages+0x164/0x3b0 This patch fixes such soft lockups. It is safe to call cond_resched() there because it is out of spin_lock/unlock section. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Jia He <[email protected]> Reviewed-by: Naoya Horiguchi <[email protected]> Acked-by: Michal Hocko <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Mike Kravetz <[email protected]> Cc: "Kirill A. Shutemov" <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
- Loading branch information