Re: [PATCH] mm/zswap: remove SWP_SYNCHRONOUS_IO swapcache bypass workaround

[Barry Song]

On Mon, Feb 2, 2026 at 1:47 AM Kairui Song <ryncsn@xxxxxxxxx> wrote:
>
> From: Kairui Song <kasong@xxxxxxxxxxx>
>
> Since commit f1879e8a0c60 ("mm, swap: never bypass the swap cache even
> for SWP_SYNCHRONOUS_IO"), all swap-in operations go through the swap
> cache, including those from SWP_SYNCHRONOUS_IO devices like
> zram. Which means the workaround for swap cache bypassing
> introduced by commit 25cd241408a2 ("mm: zswap: fix data loss on
> SWP_SYNCHRONOUS_IO devices") is no longer needed. Remove it, but
> keep the comments that are still helpful.
>
> Suggested-by: Yosry Ahmed <yosry.ahmed@xxxxxxxxx>
> Signed-off-by: Kairui Song <kasong@xxxxxxxxxxx>

LGTM, thanks!

Reviewed-by: Barry Song <baohua@xxxxxxxxxx>