linux-kernel - Re: [PATCH] zswap: only save zswap header if zpool is shrinkable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 9 Jan 2018 11:35:26 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Yu Zhao <yuzhao@...gle.com>
Cc:     Dan Streetman <ddstreet@...e.org>,
        Seth Jennings <sjenning@...hat.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] zswap: only save zswap header if zpool is shrinkable

On (01/08/18 14:51), Yu Zhao wrote:
> We waste sizeof(swp_entry_t) for zswap header when using zsmalloc
> as zpool driver because zsmalloc doesn't support eviction.
> 
> Add zpool_shrinkable() to detect if zpool is shrinkable, and use
> it in zswap to avoid waste memory for zswap header.
> 
> Signed-off-by: Yu Zhao <yuzhao@...gle.com>

at a glance, looks good to me
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>

	-ss