linux-kernel - Re: [PATCH 1/2] zram: Less checks in zram_bvec

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

Message-ID: <20151214100323.GA16372@swordfish>
Date:	Mon, 14 Dec 2015 19:03:23 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Minchan Kim <minchan@...nel.org>,
	Nitin Gupta <ngupta@...are.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 1/2] zram: Less checks in zram_bvec_write() after error
 detection

On (12/14/15 07:58), SF Markus Elfring wrote:
[..]
> > keep it the way it is please.
> 
> I suggest to make the affected exception handling a bit more efficient.
> Such source code fine-tuning has got a few special consequences.

by 'more efficient' you mean saving cpu cycles on 'bvec->bv_len != PAGE_SIZE'
comparison in exception/error path?

...
check_strm:
	if (zstrm)
		zcomp_strm_release(zram->comp, zstrm);
	if (is_partial_io(bvec)) {
free_uncmem:
		kfree(uncmem);
	}
...


no.

	-ss
--
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/