From: Minchan Kim <minchan@kernel.org>
To: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Nitin Gupta <ngupta@vflare.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCHv4 0/9] zsmalloc/zram: configurable zspage size
Date: Thu, 10 Nov 2022 14:44:22 -0800 [thread overview]
Message-ID: <Y21+xp52OQYi/qjQ@google.com> (raw)
In-Reply-To: <20221031054108.541190-1-senozhatsky@chromium.org>
On Mon, Oct 31, 2022 at 02:40:59PM +0900, Sergey Senozhatsky wrote:
> Hello,
>
> Some use-cases and/or data patterns may benefit from
> larger zspages. Currently the limit on the number of physical
> pages that are linked into a zspage is hardcoded to 4. Higher
> limit changes key characteristics of a number of the size
> classes, improving compactness of the pool and redusing the
> amount of memory zsmalloc pool uses. More on this in 0002
> commit message.
Hi Sergey,
I think the idea that break of fixed subpages in zspage is
really good start to optimize further. However, I am worry
about introducing per-pool config this stage. How about
to introduce just one golden value for the zspage size?
order-3 or 4 in Kconfig with keeping default 2?
And then we make more efforts to have auto tune based on
the wasted memory and the number of size classes on the
fly. A good thing to be able to achieve is we have indirect
table(handle <-> zpage) so we could move the object anytime
so I think we could do better way in the end.
next prev parent reply other threads:[~2022-11-10 22:44 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-31 5:40 [PATCHv4 0/9] zsmalloc/zram: configurable zspage size Sergey Senozhatsky
2022-10-31 5:41 ` [PATCHv4 1/9] zram: add size class equals check into recompression Sergey Senozhatsky
2022-10-31 5:41 ` [PATCHv4 2/9] zsmalloc: turn zspage order into runtime variable Sergey Senozhatsky
2022-11-10 21:59 ` Minchan Kim
2022-11-11 10:38 ` Sergey Senozhatsky
2022-11-11 17:09 ` Minchan Kim
2022-11-14 3:55 ` Sergey Senozhatsky
2022-10-31 5:41 ` [PATCHv4 3/9] zsmalloc: move away from page order defines Sergey Senozhatsky
2022-11-10 22:02 ` Minchan Kim
2022-10-31 5:41 ` [PATCHv4 4/9] zsmalloc: make huge class watermark zs_pool member Sergey Senozhatsky
2022-11-10 22:25 ` Minchan Kim
2022-11-11 1:07 ` Sergey Senozhatsky
2022-10-31 5:41 ` [PATCHv4 5/9] zram: huge size watermark cannot be global Sergey Senozhatsky
2022-10-31 5:41 ` [PATCHv4 6/9] zsmalloc: pass limit on pages per-zspage to zs_create_pool() Sergey Senozhatsky
2022-11-09 6:24 ` Sergey Senozhatsky
2022-11-11 17:14 ` Minchan Kim
2022-11-11 2:10 ` Minchan Kim
2022-11-11 10:32 ` Sergey Senozhatsky
2022-10-31 5:41 ` [PATCHv4 7/9] zram: add pages_per_pool_page device attribute Sergey Senozhatsky
2022-11-09 4:34 ` Sergey Senozhatsky
2022-10-31 5:41 ` [PATCHv4 8/9] Documentation: document zram pages_per_pool_page attribute Sergey Senozhatsky
2022-11-11 2:20 ` Minchan Kim
2022-11-11 10:34 ` Sergey Senozhatsky
2022-10-31 5:41 ` [PATCHv4 9/9] zsmalloc: break out of loop when found perfect zspage order Sergey Senozhatsky
2022-11-10 22:44 ` Minchan Kim [this message]
2022-11-11 0:56 ` [PATCHv4 0/9] zsmalloc/zram: configurable zspage size Sergey Senozhatsky
2022-11-11 17:03 ` Minchan Kim
2022-11-14 3:53 ` Sergey Senozhatsky
2022-11-14 7:55 ` Sergey Senozhatsky
2022-11-14 8:37 ` Sergey Senozhatsky
2022-11-15 6:01 ` Sergey Senozhatsky
2022-11-15 7:59 ` Sergey Senozhatsky
2022-11-15 23:23 ` Minchan Kim
2022-11-16 0:52 ` Sergey Senozhatsky
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