From: Andrew Morton <akpm@linux-foundation.org>
To: Alexey Romanov <avromanov@sberdevices.ru>
Cc: <minchan@kernel.org>, <senozhatsky@chromium.org>,
<ngupta@vflare.org>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>, <kernel@sberdevices.ru>
Subject: Re: [PATCH v1] zram: add size class equals check into recompression
Date: Mon, 24 Oct 2022 13:59:09 -0700 [thread overview]
Message-ID: <20221024135909.e351a2dde4eea521f359a04b@linux-foundation.org> (raw)
In-Reply-To: <20221024120942.13885-1-avromanov@sberdevices.ru>
On Mon, 24 Oct 2022 15:09:42 +0300 Alexey Romanov <avromanov@sberdevices.ru> wrote:
> It makes no sense for us to recompress the object if it will
> be in the same size class. We anyway don't get any memory gain.
> But, at the same time, we get a CPU time overhead when inserting
> this object into zspage and decompressing it afterwards.
>
Dumb question: is it ever possible for compression to result in an
increase in size?
> + class_size_next == class_size_prev ||
IOW, could this be >=?
next prev parent reply other threads:[~2022-10-24 20:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-24 12:09 Alexey Romanov
2022-10-24 20:59 ` Andrew Morton [this message]
2022-10-25 1:21 ` Sergey Senozhatsky
2022-10-25 1:53 ` Sergey Senozhatsky
2022-10-25 2:04 ` Sergey Senozhatsky
2022-10-25 9:49 ` Aleksey Romanov
2022-10-25 9:54 ` Sergey Senozhatsky
2022-10-25 10:08 ` Sergey Senozhatsky
2022-10-25 11:55 ` Aleksey Romanov
2022-10-25 12:38 ` Sergey Senozhatsky
2022-10-25 12:56 ` Aleksey Romanov
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