Re: [Qemu-devel] [PATCH v3] qemu-log: add log category for MMU info

[Alexander Graf]

On 29.10.14 06:37, Antony Pavlov wrote:
> Running barebox on qemu-system-mips* with '-d unimp' overloads
> stderr by very very many mips_cpu_handle_mmu_fault() messages:
> 
>   mips_cpu_handle_mmu_fault address=b80003fd ret 0 physical 00000000180003fd 
> prot 3
>   mips_cpu_handle_mmu_fault address=a0800884 ret 0 physical 0000000000800884 
> prot 3
>   mips_cpu_handle_mmu_fault pc a080cd80 ad b80003fd rw 0 mmu_idx 0
> 
> So it's very difficult to find LOG_UNIMP message.
> 
> The mips_cpu_handle_mmu_fault() messages appears on enabling ANY
> logging! It's not very handy.
> 
> Adding separate log category for *_cpu_handle_mmu_fault()
> logging fixes the problem.
> 
> Signed-off-by: Antony Pavlov <address@hidden>

Have you benchmarked the performance delta with this patch applied? Just
boot up a random small PPC guest that shuts down immediately and "time"
it with and without the patch applied.


Alex