Re: [PATCH] mm/zswap: invalidate duplicate entry when !zswap_enabled

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On Tue, Feb 27, 2024 at 05:04:19PM +0800, Chengming Zhou wrote:
> On 2024/2/27 16:54, Greg KH wrote:
> > On Tue, Feb 27, 2024 at 02:26:54AM +0000, chengming.zhou@xxxxxxxxx wrote:
> >> From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
> >>
> >> We have to invalidate any duplicate entry even when !zswap_enabled since
> >> zswap can be disabled anytime.  If the folio store success before, then
> >> got dirtied again but zswap disabled, we won't invalidate the old
> >> duplicate entry in the zswap_store().  So later lru writeback may
> >> overwrite the new data in swapfile.
> >>
> >> Link: https://lkml.kernel.org/r/20240208023254.3873823-1-chengming.zhou@xxxxxxxxx
> >> Fixes: 42c06a0e8ebe ("mm: kill frontswap")
> >> Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
> >> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> >> Cc: Nhat Pham <nphamcs@xxxxxxxxx>
> >> Cc: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
> >> Cc: <stable@xxxxxxxxxxxxxxx>
> >> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> >> (cherry picked from commit 678e54d4bb9a4822f8ae99690ac131c5d490cdb1)
> > 
> > What tree is this for?
> 
> Ah, for linux-6.7.y. I forgot to use your command line to send patch...

Thanks, both now queued up.

greg k-h




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