Re: [PATCH v2] net: fix sk_page_frag() recursion from memory reclaim

[Tejun Heo]

Hello,

On Thu, Oct 31, 2019 at 11:30:57AM -0700, Shakeel Butt wrote:
> Basically what I wanted to say that MM treats PF_MEMALLOC as the
> reclaim context while __GFP_MEMALLOC just tells to give access to the
> reserves. As gfpflags_allow_blocking() can be used beyond net
> subsystem, my only concern is its potential usage under PF_MEMALLOC
> context but without __GFP_MEMALLOC.

Yeah, PF_MEMALLOC is likely the better condition to check here as we
primarily want to know whether %current might be recursing and that
should be indicated reliably with PF_MEMALLOC.  Wanna prep a patch for
it?

Thanks.

-- 
tejun