On Tue, 20 Aug 2019 at 08:12, Paolo Bonzini wrote:
>
> There is a race between TCG and accesses to the dirty log:
>
> vCPU thread reader thread
> --- ---
> TLB check -> slow path
> notdirty_mem_write
>
Il gio 12 set 2019, 19:43 Richard Henderson
ha scritto:
> >>> Fortunately, in order to fix it, no change is required to the
> >>> vCPU thread. However, the reader thread must delay the read after
> >>> the vCPU thread has finished the write. This can be approximated
> >>> conservatively by
u-devel@nongnu.org; Qemu-devel
>> Subject: Re: [Qemu-devel] [PULL 15/36] memory: fix race between TCG and
>> accesses to dirty
>> bitmap
>>
>> This patch breaks the execution recording.
>> While vCPU tries to lock replay mutex in main while loop,
>> vga
On 26/08/19 14:19, dovgaluk wrote:
> This patch breaks the execution recording.
> While vCPU tries to lock replay mutex in main while loop,
> vga causes dirty memory sync and do_run_on_cpu call.
> This call waits for vCPU to process the work queue.
IIUC there is a deadlock because VGA (from the
Ping.
Pavel Dovgalyuk
> -Original Message-
> From: dovgaluk [mailto:dovga...@ispras.ru]
> Sent: Monday, August 26, 2019 3:19 PM
> To: Paolo Bonzini; pavel.dovga...@ispras.ru
> Cc: qemu-devel@nongnu.org; Qemu-devel
> Subject: Re: [Qemu-devel] [PULL 15/36] memory: fi
This patch breaks the execution recording.
While vCPU tries to lock replay mutex in main while loop,
vga causes dirty memory sync and do_run_on_cpu call.
This call waits for vCPU to process the work queue.
Pavel Dovgalyuk
Paolo Bonzini писал 2019-08-20 09:59:
There is a race between TCG and
There is a race between TCG and accesses to the dirty log:
vCPU thread reader thread
--- ---
TLB check -> slow path
notdirty_mem_write
write to RAM
set dirty flag
