Re: [Qemu-devel] [patch] IDE busmaster DMA support

2005-09-27 Thread Joe Batt
On Mon, 2005-09-26 at 21:48 -0400, John Coiner wrote: Can anyone shed light on the potential performance to be realized? For example, how long does a context switch take in the guest? If it takes 10ms (one disk seek) then there's probably no benefit to concurrent disk IO. If a context

Re: [Qemu-devel] [patch] IDE busmaster DMA support

2005-09-27 Thread Troy Benjegerdes
On Mon, Sep 26, 2005 at 09:48:25PM -0400, John Coiner wrote: Hi, Here's another patch to enable IDE DMA: http://people.brandeis.edu/~jcoiner/qemu_idedma/qemu_dma_patch.html This patch, like Juergen Lock's earlier patch from which it is derived, replaces the virtual PIIX3 IDE