From: Paolo Bonzini <pbonzini@redhat.com>
To: John Snow <jsnow@redhat.com>, Fam Zheng <famz@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>,
wangxiaolong@ucloud.cn
Subject: Re: [Qemu-devel] Fwd: qemu drive mirror assert fault
Date: Thu, 30 Apr 2015 17:54:09 +0200 [thread overview]
Message-ID: <55425021.4050606@redhat.com> (raw)
In-Reply-To: <55424F3C.1050209@redhat.com>
On 30/04/2015 17:50, Paolo Bonzini wrote:
> John, Fam,
>
> I got this report offlist. This happens if a bit in the hbitmap is
> cleared and the HBitmap has _not_ yet reached the bit. See this comment
> in include/qemu/hbitmap.h:
>
> * Resetting bits before the current
> * position of the iterator is also okay. However, concurrent
> * resetting of bits can lead to unexpected behavior if the iterator
> * has not yet reached those bits.
>
> Can you please take a look?
Oh, it's related to discard. The reported pointed out later that he is
using virtio-scsi and has discard=unmap enabled.
Paolo
next prev parent reply other threads:[~2015-04-30 15:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <tencent_D4C0F8C0FE9E16802F5FF410@qq.com>
2015-04-30 15:50 ` [Qemu-devel] Fwd: qemu drive mirror assert fault Paolo Bonzini
2015-04-30 15:54 ` Paolo Bonzini [this message]
2015-05-05 7:36 ` Fam Zheng
2015-05-05 10:13 ` Paolo Bonzini
2015-05-05 10:27 ` Fam Zheng
2015-05-05 11:48 ` Kevin Wolf
2015-05-05 11:49 ` Paolo Bonzini
2015-05-05 11:54 ` Paolo Bonzini
2015-05-05 13:03 ` Kevin Wolf
2015-05-05 13:07 ` Paolo Bonzini
2015-05-05 13:31 ` Kevin Wolf
2015-05-05 12:09 ` Fam Zheng
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