From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Vlastimil Babka <vbabka@suse.cz>,
Minchan Kim <minchan@kernel.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Subject: Re: [next-20160615] kernel BUG at mm/rmap.c:1251!
Date: Thu, 16 Jun 2016 18:23:45 +0900 [thread overview]
Message-ID: <20160616092345.GC432@swordfish> (raw)
In-Reply-To: <20160616085836.GC6836@dhcp22.suse.cz>
On (06/16/16 10:58), Michal Hocko wrote:
> > [..]
> > [ 272.687656] vma ffff8800b855a5a0 start 00007f3576d58000 end 00007f3576f66000
> > next ffff8800b977d2c0 prev ffff8800bdfb1860 mm ffff8801315ff200
> > prot 8000000000000025 anon_vma ffff8800b7e583b0 vm_ops (null)
> > pgoff 7f3576d58 file (null) private_data (null)
> > flags: 0x100073(read|write|mayread|maywrite|mayexec|account)
> > [ 272.691793] ------------[ cut here ]------------
> > [ 272.692820] kernel BUG at mm/rmap.c:1251!
>
> Is this?
> page_add_new_anon_rmap:
> VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma)
> [...]
I think it is
1248 void page_add_new_anon_rmap(struct page *page,
1249 struct vm_area_struct *vma, unsigned long address, bool compound)
1250 {
1251 int nr = compound ? hpage_nr_pages(page) : 1;
1252
1253 VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);
1254 __SetPageSwapBacked(page);
> > [ 272.727842] BUG: sleeping function called from invalid context at include/linux/sched.h:2960
>
> If yes then I am not sure we can do much about the this part. BUG_ON in
> an atomic context is unfortunate but the BUG_ON points out a real bug so
> we shouldn't drop it because of the potential atomic context. The above
> VM_BUG_ON should definitely be addressed. I thought that Vlastimil has
> pointed out some issues with the khugepaged lock inconsistencies which
> might lead to issues like this.
collapse_huge_page() ->mmap_sem fixup patch (http://marc.info/?l=linux-mm&m=146495692807404&w=2)
is in next-20160615. or do you mean some other patch?
-ss
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next prev parent reply other threads:[~2016-06-16 9:23 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 8:46 Sergey Senozhatsky
2016-06-16 8:58 ` Michal Hocko
2016-06-16 9:23 ` Sergey Senozhatsky [this message]
2016-06-16 9:41 ` Michal Hocko
2016-06-16 9:54 ` Sergey Senozhatsky
2016-06-16 10:12 ` Minchan Kim
2016-06-16 10:18 ` Sergey Senozhatsky
2016-06-17 8:17 ` Sergey Senozhatsky
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