linux-kernel - Re: [PATCH] dm-ioband-v1.12.2: I/O bandwidth controller

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 for Android: free password hash cracker in your pocket

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

Date:	Thu, 30 Jul 2009 17:53:21 +0900 (JST)
From:	Ryo Tsuruta <ryov@...inux.co.jp>
To:	horms@...ge.net.au
Cc:	agk@...hat.com, dm-devel@...hat.com, linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org,
	virtualization@...ts.linux-foundation.org,
	xen-devel@...ts.xensource.com
Subject: Re: [PATCH] dm-ioband-v1.12.2: I/O bandwidth controller

Hi Simon,

> Hi Tsuruta-san,
> 
> have you run sparse over this code? There seem to be a few interesting
> warnings generated (and some at the top noise too).

Thank you for your comment.
I'll do sparse every time from now on.
 
> $ make C=1 CF="-D__CHECK_ENDIAN__"
> [snip]
> include/trace/events/dm-ioband.h:9:1: warning: symbol 'ftrace_raw_output_ioband_hold_urgent_bio' was not declared. Should it be static?
[snip ftrace warnings]

> drivers/md/dm-ioband-ctl.c:178:2: warning: context problem in 'suspend_ioband_device': '_spin_unlock_irqrestore' expected different context
> drivers/md/dm-ioband-ctl.c:178:2:    context 'lock': wanted >= 1, got 0
> drivers/md/dm-ioband-ctl.c:600:3: warning: context imbalance in 'prevent_burst_bios': unexpected unlock
> drivers/md/dm-ioband-ctl.c:600:3:    context '<noident>': wanted 0, got -1
> drivers/md/dm-ioband-ctl.c:816:3: warning: context imbalance in 'ioband_map': __context__ statement expected different context
> drivers/md/dm-ioband-ctl.c:816:3:    context '<noident>': wanted >= 0, got -1
> drivers/md/dm-ioband-rangebw.c:287:4: warning: context imbalance in 'range_bw_queue_full': __context__ statement expected different context
> drivers/md/dm-ioband-rangebw.c:287:4:    context '<noident>': wanted >= 0, got -1

These imbalances are not warned by the latest sparse command retrieved
from the git repository, and actually they are not imbalanced.

> drivers/md/dm-ioband-rangebw.c:592:6: warning: symbol 'range_bw_timeover' was not declared. Should it be static?
> drivers/md/dm-ioband-rangebw.c:210: warning: 'io_mode' may be used uninitialized in this function

I'll fix these warnings and post the update soon.

Thanks,
Ryo Tsuruta
--
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/