qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] Re: [RFC][PATCH] make sure disk writes actually hit dis


From: Paul Brook
Subject: Re: [Qemu-devel] Re: [RFC][PATCH] make sure disk writes actually hit disk
Date: Fri, 28 Jul 2006 22:01:08 +0100
User-agent: KMail/1.9.3

> > Have you measured the impact of O_SYNC? I wouldn't be surprised if it was
> > significant.
>
> I suspect it'll be horrific in the qemu codebase (blocking execution
> of the guest OS until disk IO is complete), but it's fine in the Xen
> qemu-dm situation, where IO completion happens asynchronously.
>
> The recent commit message on the Xen side did not suggest there was
> that much of a difference between both qemu code bases.  Obviously
> I was wrong, and the O_SYNC bandaid should probably be kept out for
> now.

Ah, ok. I didn't realise they'd diverged that much either.

Paul




reply via email to

[Prev in Thread] Current Thread [Next in Thread]