On Mon, 6 May 2019 22:06:38 +0800 Zhiqiang Liu <liuzhiqian...@huawei.com> wrote:
> From: Kai Shen <shenk...@huawei.com> > > spinlock recursion happened when do LTP test: > #!/bin/bash > ./runltp -p -f hugetlb & > ./runltp -p -f hugetlb & > ./runltp -p -f hugetlb & > ./runltp -p -f hugetlb & > ./runltp -p -f hugetlb & > > The dtor returned by get_compound_page_dtor in __put_compound_page > may be the function of free_huge_page which will lock the hugetlb_lock, > so don't put_page in lock of hugetlb_lock. > > BUG: spinlock recursion on CPU#0, hugemmap05/1079 > lock: hugetlb_lock+0x0/0x18, .magic: dead4ead, .owner: hugemmap05/1079, > .owner_cpu: 0 > Call trace: > dump_backtrace+0x0/0x198 > show_stack+0x24/0x30 > dump_stack+0xa4/0xcc > spin_dump+0x84/0xa8 > do_raw_spin_lock+0xd0/0x108 > _raw_spin_lock+0x20/0x30 > free_huge_page+0x9c/0x260 > __put_compound_page+0x44/0x50 > __put_page+0x2c/0x60 > alloc_surplus_huge_page.constprop.19+0xf0/0x140 > hugetlb_acct_memory+0x104/0x378 > hugetlb_reserve_pages+0xe0/0x250 > hugetlbfs_file_mmap+0xc0/0x140 > mmap_region+0x3e8/0x5b0 > do_mmap+0x280/0x460 > vm_mmap_pgoff+0xf4/0x128 > ksys_mmap_pgoff+0xb4/0x258 > __arm64_sys_mmap+0x34/0x48 > el0_svc_common+0x78/0x130 > el0_svc_handler+0x38/0x78 > el0_svc+0x8/0xc > > Fixes: 9980d744a0 ("mm, hugetlb: get rid of surplus page accounting tricks") > Signed-off-by: Kai Shen <shenk...@huawei.com> > Signed-off-by: Feilong Lin <linfeil...@huawei.com> > Reported-by: Wang Wang <wangwa...@huawei.com> > Acked-by: Michal Hocko <mho...@suse.com> THanks. I added cc:sta...@vger.kernel.org to this.