linux-ext4 - Re: ext2/zram issue [was: Linux 5.19]

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Message-ID: <YvJKwCXewHmuWGdh@google.com>
Date:   Tue, 9 Aug 2022 20:53:36 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Dmitry Rokosov <DDRokosov@...rdevices.ru>,
        Jiri Slaby <jirislaby@...nel.org>,
        Minchan Kim <minchan@...nel.org>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "ngupta@...are.org" <ngupta@...are.org>, Jan Kara <jack@...e.com>,
        Ted Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Ext4 Developers List <linux-ext4@...r.kernel.org>,
        Aleksey Romanov <AVRomanov@...rdevices.ru>
Subject: Re: ext2/zram issue [was: Linux 5.19]

Hi,

On (22/08/09 10:20), Dmitry Rokosov wrote:
> I think oom-kill is an inevitable escape from low memory situation if we
> don't solve original problem with high memory consumption in the user
> setup. Reclaim-based zram slow path just delays oom if memory eating
> root cause is not resolved.
> 
> I totally agree with you that all patches which have visible user
> degradations should be reverted, but maybe this is more user setup
> problem, what do you think?

I'd go with the revert.
Jiri, are you going to send the revert patch or shall I handle it?

> If you make the decision to revert slow path removal patch, I would
> prefer to review the original patch with unneeded code removal again
> if you don't mind:
> https://lore.kernel.org/linux-block/20220422115959.3313-1-avromanov@sberdevices.ru/

Sure, we can return to it after the merge window.