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Re: [Qemu-devel] VFIO-VGA Issue
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] VFIO-VGA Issue |
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Date: |
Fri, 17 May 2013 12:23:36 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4 |
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.
Paolo