linux-kernel - Re: [PATCH] scsi: Silence unnecessary warnings about ioctl to partition

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Message-ID: <4FA3D4B1.9040308@redhat.com>
Date:	Fri, 04 May 2012 15:08:01 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Mark Lord <kernel@...savvy.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, Jan Kara <jack@...e.cz>,
	Jens Axboe <axboe@...nel.dk>,
	LKML <linux-kernel@...r.kernel.org>,
	James Bottomley <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH] scsi: Silence unnecessary warnings about ioctl to partition

Il 04/05/2012 15:06, Mark Lord ha scritto:
>> > I said which ioctls, not which options.  I.e. cut-and-paste from dmesg.
> Here are some:

Thanks!

> messages.1:Apr 28 14:08:09 zbox5 kernel: [  268.800536] hdparm: sending ioctl 330 to a partition!
> messages.1:Apr 28 14:08:09 zbox5 kernel: [  268.800547] hdparm: sending ioctl 330 to a partition!
> messages.1:Apr 28 14:08:57 zbox5 kernel: [  316.413944] hdparm: sending ioctl 330 to a partition!
> messages.1:Apr 28 14:08:57 zbox5 kernel: [  316.413951] hdparm: sending ioctl 330 to a partition!
> messages.1:Apr 28 14:20:10 zbox5 kernel: [  989.525085] hdparm: sending ioctl 330 to a partition!
> messages.1:Apr 28 14:20:10 zbox5 kernel: [  989.525093] hdparm: sending ioctl 330 to a partition!
> 
> The in <linux/hdreg.h> say this about 330:
> 
> ...
> /* 0x330 is reserved - used to be HDIO_GETGEO_BIG */
> ...
> 
> So it's HDIO_GETGEO_BIG, which doesn't exist in newer kernels.
> I wonder when that got removed?  Minor userspace breakage there.
> 
> hdparm issues it first as a backward-compatibility thing,
> before falling back to the even-more obsolete HDIO_GETGEO,
> which curiously enough is still in modern kernels.

Ok, so hdparm is not broken.  My patch (which left the warning only for
SG_IO, and failed all other ioctls) would have worked, too.

Paolo
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