Date: Wed, 24 Oct 2012 11:48:13 -0500 From: Alan Cox <alc@rice.edu> To: Konstantin Belousov <kostikbel@gmail.com> Cc: freebsd-current@freebsd.org, Svatopluk Kraus <onwahe@gmail.com> Subject: Re: i386 pmap - missing sched_pin()? Message-ID: <50881BCD.1010502@rice.edu> In-Reply-To: <20121023131450.GU35915@deviant.kiev.zoral.com.ua> References: <CAFHCsPXNnm9c1FL=9%2B2k6X6O1qfRQPRVybueM5xwdbdvONj1jg@mail.gmail.com> <20121023131450.GU35915@deviant.kiev.zoral.com.ua>
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On 10/23/2012 08:14, Konstantin Belousov wrote:
> On Tue, Oct 23, 2012 at 02:36:07PM +0200, Svatopluk Kraus wrote:
>> Hi,
>>
>> I'm just syncing my ARM pmap code (base on i386 one) with current
>> i386 pmap code. It looks that sched_pin() is missing after successful
>> rw_try_wlock() in pmap_protect().
> Yes, you are right, I think. The following patch takes care of it.
>
> diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c
> index ac087f6..b9033da 100644
> --- a/sys/i386/i386/pmap.c
> +++ b/sys/i386/i386/pmap.c
> @@ -3221,6 +3221,7 @@ resume:
> PMAP_UNLOCK(pmap);
> goto resume;
> }
> + sched_pin();
> }
> if (!pmap_demote_pde(pmap,
> &pmap->pm_pdir[pdirindex], sva)) {
Agreed. Please commit this change.
Alan
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