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Re: [Xen-devel] [PATCH][RFC] open HVM backing storage with O_SYNC
| To: | "Rik van Riel" <riel@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH][RFC] open HVM backing storage with O_SYNC |
| From: | "Christian Limpach" <christian.limpach@xxxxxxxxx> |
| Date: | Fri, 4 Aug 2006 10:29:44 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 04 Aug 2006 02:30:41 -0700 |
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| Reply-to: | Christian.Limpach@xxxxxxxxxxxx |
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On 7/28/06, Rik van Riel <riel@xxxxxxxxxx> wrote: I noticed that the new qemu-dm code has DMA_MULTI_THREAD defined, so I/O already overlaps with CPU run time of the guest domain. This means that we might as well open the backing storage with O_SYNC, so writes done by the guest hit the disk when the guest expects them to, and in the other the guest expects them to. I am now running my postgresql HVM test domain (which has had its database eaten a number of times by the async write behaviour) with this patch, and will try to abuse it heavily over the next few days. Any comments on this patch?
Applied, thanks!
christian
-- "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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