Re: [PATCH 2/5] swap: fix do_swap_page() race with swapoff

[Tim Chen]

On 4/12/21 6:27 PM, Huang, Ying wrote:

> 
> This isn't the commit that introduces the race.  You can use `git blame`
> find out the correct commit.  For this it's commit 0bcac06f27d7 "mm,
> swap: skip swapcache for swapin of synchronous device".
> 
> And I suggest to merge 1/5 and 2/5 to make it easy to get the full
> picture.

I'll suggest make fix to do_swap_page race with get/put_swap_device
as a first patch. Then the per_cpu_ref stuff in patch 1 and patch 2 can
be combined together.

Tim