Re: [RFC][PATCHv2 0/4] less deadlock prone serial consoles

2018-10-16 Thread Sergey Senozhatsky
On (10/16/18 09:23), Peter Zijlstra wrote: > On Tue, Oct 16, 2018 at 02:04:24PM +0900, Sergey Senozhatsky wrote: > > Hello, > > > > > > RFC > > > > > > The patch set reduces the number of ways serial consoles > > can deadlock the system, including the recently reported deadlock > >

Re: [RFC][PATCHv2 0/4] less deadlock prone serial consoles

2018-10-16 Thread Peter Zijlstra
On Tue, Oct 16, 2018 at 02:04:24PM +0900, Sergey Senozhatsky wrote: > Hello, > > > RFC > > > The patch set reduces the number of ways serial consoles > can deadlock the system, including the recently reported deadlock > in panic(). That's what I use early_printk for... :-)

[RFC][PATCHv2 0/4] less deadlock prone serial consoles

2018-10-15 Thread Sergey Senozhatsky
Hello, RFC The patch set reduces the number of ways serial consoles can deadlock the system, including the recently reported deadlock in panic(). The test scenario I ran on my x86_64 box: - panic() the system while one of the CPUs holds 8250's uart_port->lock. Test r