Re: [Qemu-devel] Using cache=writeback safely on qemu 1.4.0 and later

[Andrew Martin]

----- Original Message -----
> From: "Paolo Bonzini" <address@hidden>
> To: "Andrew Martin" <address@hidden>
> Cc: "Stefan Hajnoczi" <address@hidden>, "qemu-devel" <address@hidden>
> Sent: Wednesday, August 27, 2014 9:34:27 AM
> Subject: Re: Using cache=writeback safely on qemu 1.4.0 and later
> 
> Il 27/08/2014 16:23, Andrew Martin ha scritto:
> > Thanks for the info about this bug - I am using QEMU 1.4.0 (released on
> > 02/15/13)
> > and ef5bc96268 was added on 09/20/13, so the bug had not been fixed in the
> > version
> > of QEMU I am using. I have had trouble reproducing it on-demand - was there
> > specific
> > behavior you used to reproduce it, or just the lack of fsyncs or fdatasyncs
> > when
> > stracing the QEMU process when using cache=writeback?
> 
> Just the lack of fdatasyncs.
> 
Paolo,

I also did not see any fdatasyncs when using cache=none - would that also be
explained by this bug?

Thanks,

Andrew