linux-kernel - Re: [PATCHv4 2/9] zram: Add recompression algorithm sysfs knob

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Message-ID: <Y2W8uwlg/rr2LR6M@google.com>
Date:   Sat, 5 Nov 2022 10:30:35 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Minchan Kim <minchan@...nel.org>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCHv4 2/9] zram: Add recompression algorithm sysfs knob

On (22/11/04 17:01), Minchan Kim wrote:
> > One can be SW one can be HW. So I thought about having flexibility here.
> > Instead of doing
> > 
> > 	for (idx = 1; idx < MAX_IDX; idx++) {
> > 		len = zcomp_compress(zram->comps[idx]);
> > 		if (len <= threshold)
> > 			break;
> > 	}
> > 
> > We would just directly use the suggested algo.
> > 
> > But we probably don't need that param at all and can use
> > the loop instead?
> 
> I don't understand what param you are saying. I expected
> the zram->comps array already has sorted algoritm based on the
> priority so the loop will try compression as expected so loop is fine.
> Are we on same page?

I'll try to implement both loop and a specific algorithm selection.