linux-kernel - Re: [PATCH v6 2/2] Output stall data in debugfs

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Message-ID: <1313089988.8491.15.camel@twins>
Date:	Thu, 11 Aug 2011 21:13:08 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alex Neronskiy <zakmagnus@...omium.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Don Zickus <dzickus@...hat.com>,
	Mandeep Singh Baines <msb@...omium.org>,
	Alex Neronskiy <zakmagnus@...omium.com>
Subject: Re: [PATCH v6 2/2] Output stall data in debugfs

On Wed, 2011-08-10 at 11:02 -0700, Alex Neronskiy wrote:

> +static unsigned long softstall_trace_entries[STALL_MAX_TRACE_DEPTH * 2];
> +static struct stack_trace softstall_traces[2];
> +static spinlock_t softstall_locks[2];
> +static DEFINE_SPINLOCK(softstall_read_lock);
> +static DEFINE_SPINLOCK(softstall_write_lock);
> +static int soft_read_ind;
>  
>  static DEFINE_PER_CPU(unsigned long, watchdog_touch_ts);
>  static DEFINE_PER_CPU(struct task_struct *, softlockup_watchdog);
> @@ -46,7 +67,12 @@ static DEFINE_PER_CPU(unsigned long, hrtimer_interrupts_missed);
>  static DEFINE_PER_CPU(struct perf_event *, watchdog_ev);
>  
>  unsigned long worst_hardstall;
> +static unsigned long hardstall_trace_entries[STALL_MAX_TRACE_DEPTH * 2];
> +static struct stack_trace hardstall_traces[2];
> +static spinlock_t hardstall_locks[2];
> +static DEFINE_SPINLOCK(hardstall_read_lock);
> +static DEFINE_SPINLOCK(hardstall_write_lock);
> +static int hard_read_ind; 

You really gotta love typing, but the rest of us know to use structures
for this.
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