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Date: Wed, 18 Oct 2017 21:30:32 -0700
From: Andi Kleen <ak@linux.intel.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: Srividya Desireddy <srividya.dr@samsung.com>,
        "sjenning@redhat.com" <sjenning@redhat.com>,
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        Dinakar Reddy Pathireddy <dinakar.p@samsung.com>,
        SHARAN ALLUR <sharan.allur@samsung.com>,
        RAJIB BASU <rajib.basu@samsung.com>, JUHUN KIM <juhunkim@samsung.com>,
        "srividya.desireddy@gmail.com" <srividya.desireddy@gmail.com>
Subject: Re: [PATCH] zswap: Same-filled pages handling
Message-ID: <20171019043032.GY5109@tassilo.jf.intel.com>
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> Yes.  Every 64-bit repeating pattern is also a 32-bit repeating pattern.
> Supporting a 64-bit pattern on a 32-bit kernel is painful, but it makes
> no sense to *not* support a 64-bit pattern on a 64-bit kernel.  

But a 32bit repeating pattern is not necessarily a 64bit pattern.

>This is the same approach used in zram, fwiw.

Sounds bogus.

-Andi