linux-kernel - Re: [PATCH v7 00/21] mm/zsmalloc: add zpdesc memory descriptor for zswap.zpool

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Message-ID: <20240903033558.GC9738@google.com>
Date: Tue, 3 Sep 2024 12:35:58 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: alexs@...nel.org
Cc: Vitaly Wool <vitaly.wool@...sulko.com>,
	Miaohe Lin <linmiaohe@...wei.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	minchan@...nel.org, willy@...radead.org, senozhatsky@...omium.org,
	david@...hat.com, 42.hyeyoo@...il.com,
	Yosry Ahmed <yosryahmed@...gle.com>, nphamcs@...il.com
Subject: Re: [PATCH v7 00/21] mm/zsmalloc: add zpdesc memory descriptor for
 zswap.zpool

On (24/09/02 15:21), alexs@...nel.org wrote:
> The descriptor still overlays the struct page; nothing has changed
> in that regard.
> [..]
> This patachset does not increase the descriptor size nor introduce any
> functional changes, and could save about 122Kbytes zsmalloc.o size.

Is this number accurate?  Where does such a large saving come from?