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Re: [Qemu-devel] VFIO-VGA Issue
From: |
Alex Williamson |
Subject: |
Re: [Qemu-devel] VFIO-VGA Issue |
Date: |
Sun, 19 May 2013 21:10:22 -0600 |
On Fri, 2013-05-17 at 12:23 +0200, Paolo Bonzini wrote:
> Il 16/05/2013 22:46, Maik Broemme ha scritto:
> >
> > Regarding 2) it results in 100 messages like the following on the console
> > which runs qemu:
> >
> > qemu-system-x86_64: vfio_vga_read(,0x3c3, 1) failed: Interrupted system call
> > qemu-system-x86_64: vfio_vga_read(,0x3c3, 1) failed: Interrupted system call
> > qemu-system-x86_64: vfio_vga_read(,0x3c3, 1) failed: Interrupted system call
>
> This is because VFIO is not looping around pread errors (or short
> reads). The masking of signals is slightly different between TCG and
> KVM, and VFIO code runs with signals unmasked when KVM is disabled.
I didn't know that, I'll add some retries. Thanks,
Alex