Re: [mmots-2016-06-09-16-49] kernel BUG at mm/slub.c:1616

[Michal Hocko]

On Fri 10-06-16 15:11:39, Sergey Senozhatsky wrote:
> Hello,
> 
> [  429.191962] gfp: 2
> [  429.192634] ------------[ cut here ]------------
> [  429.193281] kernel BUG at mm/slub.c:1616!
[...]
> [  429.217369]  [<ffffffff811ca221>] bio_alloc_bioset+0xbd/0x1b1
> [  429.218013]  [<ffffffff81148078>] mpage_alloc+0x28/0x7b
> [  429.218650]  [<ffffffff8114856a>] do_mpage_readpage+0x43d/0x545
> [  429.219282]  [<ffffffff81148767>] mpage_readpages+0xf5/0x152

OK, so this is flags & GFP_SLAB_BUG_MASK BUG_ON because gfp is
___GFP_HIGHMEM. It is my [1] patch which has introduced it.
I think we need the following. Andrew could you fold it into
mm-memcg-use-consistent-gfp-flags-during-readahead.patch or maybe keep
it as a separate patch?

[1] http://lkml.kernel.org/r/1465301556-26431-1-git-send-email-mhocko@xxxxxxxxxx

Thanks for the report Sergey!

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