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From: Wanlong Gao <gaowanlong@cn.fujitsu.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: fengguang.wu@intel.com
Subject: Bug in BLKBSZSET/GET ioctl ?
Date: Thu, 29 Dec 2011 11:51:45 +0800	[thread overview]
Message-ID: <4EFBE3D1.5030608@cn.fujitsu.com> (raw)

Hi all:

This is first reported to *libguestfs*: https://bugzilla.redhat.com/show_bug.cgi?id=624335

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

             reply	other threads:[~2011-12-29  3:52 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-29  3:51 Wanlong Gao [this message]
2011-12-29  3:56 ` Bug in BLKBSZSET/GET ioctl ? Wanlong Gao
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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