Date: Tue, 23 Oct 2012 16:14:50 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Svatopluk Kraus <onwahe@gmail.com> Cc: freebsd-current@freebsd.org, Alan Cox <alc@rice.edu> Subject: Re: i386 pmap - missing sched_pin()? Message-ID: <20121023131450.GU35915@deviant.kiev.zoral.com.ua> In-Reply-To: <CAFHCsPXNnm9c1FL=9%2B2k6X6O1qfRQPRVybueM5xwdbdvONj1jg@mail.gmail.com> References: <CAFHCsPXNnm9c1FL=9%2B2k6X6O1qfRQPRVybueM5xwdbdvONj1jg@mail.gmail.com>
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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)) {
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