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Re: [PATCH for-4.2 v2 3/3] block/file-posix: Let post-EOF fallocate seri

From: Max Reitz
Subject: Re: [PATCH for-4.2 v2 3/3] block/file-posix: Let post-EOF fallocate serialize
Date: Thu, 14 Nov 2019 18:15:21 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1

On 14.11.19 17:27, Christoph Hellwig wrote:
> On Fri, Nov 01, 2019 at 04:25:10PM +0100, Max Reitz wrote:
>> The XFS kernel driver has a bug that may cause data corruption for qcow2
>> images as of qemu commit c8bb23cbdbe32f.  We can work around it by
>> treating post-EOF fallocates as serializing up until infinity (INT64_MAX
>> in practice).
> This has been fixed in the kernel a while ago.  I don't think it makes
> sense to work around it in qemu.

Has it?  It was my understanding that this is fixed by
has been merged only very recently and is on track to be part of Linux
5.5, as far as I understand.


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