Re: [PATCH 1/6] mm/zswap: add more comments in shrink_memcg_cb()

[Johannes Weiner]

On Thu, Feb 01, 2024 at 03:49:01PM +0000, Chengming Zhou wrote:
> Add more comments in shrink_memcg_cb() to describe the deref dance
> which is implemented to fix race problem between lru writeback and
> swapoff, and the reason why we rotate the entry at the beginning.
> 
> Also fix the stale comments in zswap_writeback_entry(), and add
> more comments to state that we only deref the tree after we get
> the swapcache reference.
> 
> Suggested-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
> Suggested-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>

Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Thanks!