linux-kernel - Re: [PATCH] pstore: change mutex locking to spin

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Message-ID: <CA+8MBb+E462CVOe+5FQb62Tdi5R6cBYgFZUW7sxWDDh2QTaxxA@mail.gmail.com>
Date:	Fri, 22 Jul 2011 16:21:14 -0700
From:	Tony Luck <tony.luck@...el.com>
To:	Don Zickus <dzickus@...hat.com>,
	"Huang, Ying" <ying.huang@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pstore: change mutex locking to spin_locks

On Fri, Jul 22, 2011 at 3:39 PM, Luck, Tony <tony.luck@...el.com> wrote:
> Yup - oops is the only one where the current kernel continues - all the
> others (halt, reboot, kexec, panic) lead to the termination of the
> current kernel - and thus no user processes that would be able to
> see the shiny new entry in the pstore file system.

Doh - I went to look at what it would take to fix this - and found that
I'd already implemented it:


                if (reason == KMSG_DUMP_OOPS && pstore_is_mounted())
                        pstore_mkfile(PSTORE_TYPE_DMESG, psinfo->name, id,
                                      psinfo->buf, hsize + l1_cpy + l2_cpy,
                                      CURRENT_TIME, psinfo);

-Tony
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