Re: [PATCH] mm/vmscan: Do not block forever at shrink_inactive_list().

[Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>]

Dave Chinner wrote:
> So, XFS should be passing kswapd context to the workqueue allocation
> context. The patch below does this.
> 
> Tetsuo-san, when it comes to problems involving XFS, you should
> really CC xfs@xxxxxxxxxxx because very few people really know how
> XFS works and even fewer still know how it is supposed to interact
> with memory reclaim....

Thank you for the patch, but ...

  #define PF_KSWAPD       0x00040000      /* I am kswapd */

  static inline int current_is_kswapd(void)
  {
        return current->flags & PF_KSWAPD;
  }

I think ((char) (current->flags & 0x00040000)) == 0.
Your patch wants

  -args->kswapd = current_is_kswapd();
  +args->kswapd = (current_is_kswapd() != 0);