On Tue, Oct 20, 2015 at 12:53:17PM -0700, Dave Hansen wrote:
> @@ -1445,6 +1514,10 @@ static struct page *alloc_buddy_huge_pag
> if (hstate_is_gigantic(h))
> return NULL;
>
> + if (vma || addr) {
> + WARN_ON_ONCE(!addr || addr == -1);
Trinity triggered the WARN for me:
[ 118.647212] WARNING: CPU: 10 PID: 9621 at /home/kas/linux/mm/mm/hugetlb.c:1514 __alloc_buddy_huge_page+0x2c8/0x300()
[ 118.648698] Modules linked in:
[ 118.649105] CPU: 10 PID: 9621 Comm: trinity-c147 Not tainted 4.2.0-dirty #651
[ 118.649909] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS Debian-1.8.2-1 04/01/2014
[ 118.650929] ffffffff81ca6ad8 ffff88081f7f3c68 ffffffff818a9977 0000000080000001
[ 118.651889] 0000000000000000 ffff88081f7f3ca8 ffffffff810574d6 ffff88081f7f3c98
[ 118.652965] 0000000000000000 ffffffff830a87e0 00000000ffffffff ffffffffffffffff
[ 118.653988] Call Trace:
[ 118.654315] [<ffffffff818a9977>] dump_stack+0x4f/0x7b
[ 118.654936] [<ffffffff810574d6>] warn_slowpath_common+0x86/0xc0
[ 118.655630] [<ffffffff810575ca>] warn_slowpath_null+0x1a/0x20
[ 118.656427] [<ffffffff811ac5e8>] __alloc_buddy_huge_page+0x2c8/0x300
[ 118.657185] [<ffffffff811ad081>] hugetlb_acct_memory+0xa1/0x3d0
[ 118.657897] [<ffffffff811ab241>] ? region_chg+0x1f1/0x200
[ 118.658559] [<ffffffff811ae932>] hugetlb_reserve_pages+0x92/0x250
[ 118.659289] [<ffffffff812d517c>] hugetlb_file_setup+0x14c/0x320
[ 118.659994] [<ffffffff813d2fd5>] newseg+0x135/0x370
[ 118.660713] [<ffffffff813cc134>] ? ipcget+0x44/0x2d0
[ 118.661306] [<ffffffff813cc360>] ipcget+0x270/0x2d0
[ 118.661911] [<ffffffff813d3525>] SyS_shmget+0x45/0x50
[ 118.663409] [<ffffffff818b2c7c>] tracesys_phase2+0x84/0x89
[ 118.664199] ---[ end trace d2829191292b44ef ]---
> + WARN_ON_ONCE(nid != NUMA_NO_NODE);
> + }
> /*
> * Assume we will successfully allocate the surplus page to
> * prevent racing processes from causing the surplus to exceed
--
Kirill A. Shutemov
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