From: Wanlong Gao <gaowanlong@cn.fujitsu.com>
To: unlisted-recipients:; (no To-header on input)
Cc: gaowanlong@cn.fujitsu.com, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, fengguang.wu@intel.com
Subject: Re: Bug in BLKBSZSET/GET ioctl ?
Date: Thu, 29 Dec 2011 11:56:27 +0800 [thread overview]
Message-ID: <4EFBE4EB.3040001@cn.fujitsu.com> (raw)
In-Reply-To: <4EFBE3D1.5030608@cn.fujitsu.com>
On 12/29/2011 11:51 AM, Wanlong Gao wrote:
> Hi all:
>
> This is first reported to *libguestfs*: https://bugzilla.redhat.com/show_bug.cgi?id=624335
The blockdev-get/setbsz in *libguestfs* is just a wraper of util-linux's *blockdev --get/setbsz*.
>
> Then, I looked into upstream util-linux and it seems nothing wrong. I'm not convinced that it's a kernel bug.
>
> produce:
>
> ---
> # ./util-linux/disk-utils/blockdev --getbsz /dev/sda6
> 4096
> # ./util-linux/disk-utils/blockdev --setbsz 2048 /dev/sda6
> # ./util-linux/disk-utils/blockdev --getbsz /dev/sda6
> 4096
> # ./util-linux/disk-utils/blockdev --setbsz 512 /dev/sda6
> # ./util-linux/disk-utils/blockdev --getbsz /dev/sda6
> 4096
>
> ---
>
> I'm not sure if it is related to write-back, but still CCed to Fengguang.
>
>
>
> Thanks,
> -Wanlong Gao
next prev parent reply other threads:[~2011-12-29 3:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-29 3:51 Bug in BLKBSZSET/GET ioctl ? Wanlong Gao
2011-12-29 3:56 ` Wanlong Gao [this message]
2011-12-29 8:19 ` Richard W.M. Jones
2011-12-29 4:20 ` Wu Fengguang
2011-12-29 4:28 ` Wanlong Gao
2011-12-29 4:40 ` Wu Fengguang
2011-12-29 6:09 ` Wanlong Gao
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