linux-kernel - Re: [PATCH v1 2/2] zram: remove init_lock in zram_make

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150129020139.GB9672@blaptop>
Date:	Thu, 29 Jan 2015 11:01:40 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>, Nitin Gupta <ngupta@...are.org>,
	Jerome Marchand <jmarchan@...hat.com>,
	Ganesh Mahendran <opensource.ganesh@...il.com>,
	sergey.senozhatsky.work@...il.com
Subject: Re: [PATCH v1 2/2] zram: remove init_lock in zram_make_request

On Thu, Jan 29, 2015 at 10:57:38AM +0900, Sergey Senozhatsky wrote:
> On Thu, Jan 29, 2015 at 8:33 AM, Minchan Kim <minchan@...nel.org> wrote:
> 
> > On Wed, Jan 28, 2015 at 11:56:51PM +0900, Sergey Senozhatsky wrote:
> > > I don't like re-introduced ->init_done.
> > > another idea... how about using `zram->disksize == 0' instead of
> > > `->init_done' (previously `->meta != NULL')? should do the trick.
> >
> > It could be.
> >
> >
> care to change it?

Will try!

> 
> 
> 
> > >
> > >
> > > and I'm not sure I get this rmb...
> >
> > What makes you not sure?
> > I think it's clear and common pattern for smp_[wmb|rmb]. :)
> >
> 
> 
> well... what that "if (ret)" gives? it's almost always true, because the
> device is initialized during read/write operations (in 99.99% of cases).

If it was your concern, I'm happy to remove the check.(ie, actually,
I realized that after I push the button to send). Thanks!

> 
> -ss

-- 
Kind regards,
Minchan Kim
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/