linux-kernel - Re: [PATCHv4 4/9] zram: Introduce recompress sysfs knob

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Message-ID: <Y2TIlZoOZwDB+rln@google.com>
Date:   Fri, 4 Nov 2022 17:08:53 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Minchan Kim <minchan@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: Re: [PATCHv4 4/9] zram: Introduce recompress sysfs knob

On (22/11/04 16:53), Sergey Senozhatsky wrote:
[..]
> +static inline void zram_set_priority(struct zram *zram, u32 index, u32 prio)
> +{
> +       prio &= ZRAM_COMP_PRIORITY_MASK;
> +       zram->table[index].flags &= (prio << ZRAM_COMP_PRIORITY_1);
> +}

Uh... Something like this, sorry.

+static inline void zram_set_priority(struct zram *zram, u32 index, u32 prio)
+{
+       prio &= ZRAM_RECOMP_PRIO_MASK;
+       zram->table[index].flags &= ~(ZRAM_RECOMP_PRIO_MASK <<
+                                    ZRAM_RECOMP_PRIORITY_1);
+       zram->table[index].flags |= (prio << ZRAM_RECOMP_PRIORITY_1);
+}