From: Scott Wood <scottwood@freescale.com>
To: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Cc: Rex Feany <RFeany@mrv.com>,
"linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>
Subject: Re: [PATCH 4/8] 8xx: Fixup DAR from buggy dcbX instructions.
Date: Wed, 14 Oct 2009 16:14:48 -0500 [thread overview]
Message-ID: <4AD63F48.8030301@freescale.com> (raw)
In-Reply-To: <OF459A0F65.D3201748-ONC125764F.00738958-C125764F.00744CF0@transmode.se>
Joakim Tjernlund wrote:
>> With that, I don't see the hard lockup, but things get stuck during
>
> You needed both to loose the hard lockup? I would think
> it should be enough to revert the "various copy routines" stuff?
No, but when I just reverted the patch and didn't change the TLB error handler,
I got some other weirdness (assertion failure in some userspace program). It
may have been coincidental, though.
>> I think there's something else going on in the 2.6 8xx code that needs
>> to be fixed before we can tell what the impact of these patches is.
>> I'll look into it.
>
> Great because I am really out of ideas. Perhaps back down to 2.6.30 and test
> from there?
I think the last working version was a little older than that -- and it's quite
possible that there was underlying badness even earlier that just recently got
exposed. I think I want to just debug it and find out what's really going on.
-Scott
next prev parent reply other threads:[~2009-10-14 21:14 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-11 16:35 [PATCH 0/8] Fix 8xx MMU/TLB Joakim Tjernlund
2009-10-11 16:35 ` [PATCH 1/8] 8xx: invalidate non present TLBs Joakim Tjernlund
2009-10-11 16:35 ` [PATCH 2/8] 8xx: Update TLB asm so it behaves as linux mm expects Joakim Tjernlund
2009-10-11 16:35 ` [PATCH 3/8] 8xx: Tag DAR with 0x00f0 to catch buggy instructions Joakim Tjernlund
2009-10-11 16:35 ` [PATCH 4/8] 8xx: Fixup DAR from buggy dcbX instructions Joakim Tjernlund
2009-10-11 16:35 ` [PATCH 5/8] 8xx: dcbst sets store bit in DTLB error, workaround Joakim Tjernlund
2009-10-11 16:35 ` [PATCH 6/8] 8xx: Add missing Guarded setting in DTLB Error Joakim Tjernlund
2009-10-11 16:35 ` [PATCH 7/8] 8xx: Restore _PAGE_WRITETHRU Joakim Tjernlund
2009-10-11 16:35 ` [PATCH 8/8] 8xx: start using dcbX instructions in various copy routines Joakim Tjernlund
2009-10-11 21:26 ` [PATCH 7/8] 8xx: Restore _PAGE_WRITETHRU Benjamin Herrenschmidt
2009-10-11 22:21 ` Joakim Tjernlund
2009-10-11 22:45 ` Benjamin Herrenschmidt
2009-10-11 21:25 ` [PATCH 6/8] 8xx: Add missing Guarded setting in DTLB Error Benjamin Herrenschmidt
2009-10-11 22:19 ` Joakim Tjernlund
2009-10-11 22:44 ` Benjamin Herrenschmidt
2009-10-12 5:36 ` Joakim Tjernlund
2009-10-12 5:46 ` Benjamin Herrenschmidt
2009-10-12 6:59 ` Joakim Tjernlund
2009-10-14 17:02 ` [PATCH 5/8] 8xx: dcbst sets store bit in DTLB error, workaround Scott Wood
2009-10-14 17:20 ` [PATCH 4/8] 8xx: Fixup DAR from buggy dcbX instructions Scott Wood
2009-10-14 19:05 ` Joakim Tjernlund
2009-10-14 19:23 ` Scott Wood
2009-10-14 20:03 ` Joakim Tjernlund
2009-10-14 20:22 ` Scott Wood
2009-10-14 21:10 ` Joakim Tjernlund
2009-10-14 21:14 ` Scott Wood [this message]
2009-10-14 21:17 ` Benjamin Herrenschmidt
2009-10-14 21:41 ` Joakim Tjernlund
2009-10-14 21:52 ` Benjamin Herrenschmidt
2009-10-14 22:09 ` Joakim Tjernlund
2009-10-11 21:25 ` [PATCH 2/8] 8xx: Update TLB asm so it behaves as linux mm expects Benjamin Herrenschmidt
2009-10-14 16:57 ` Scott Wood
2009-10-14 16:56 ` [PATCH 1/8] 8xx: invalidate non present TLBs Scott Wood
2009-10-14 17:23 ` [PATCH 0/8] Fix 8xx MMU/TLB Scott Wood
2009-10-14 18:46 ` Joakim Tjernlund
2009-10-15 9:04 Joakim Tjernlund
2009-10-15 9:04 ` [PATCH 1/8] 8xx: invalidate non present TLBs Joakim Tjernlund
2009-10-15 9:04 ` [PATCH 2/8] 8xx: Update TLB asm so it behaves as linux mm expects Joakim Tjernlund
2009-10-15 9:04 ` [PATCH 3/8] 8xx: Tag DAR with 0x00f0 to catch buggy instructions Joakim Tjernlund
2009-10-15 9:04 ` [PATCH 4/8] 8xx: Fixup DAR from buggy dcbX instructions Joakim Tjernlund
2009-11-04 13:38 [PATCH 0/8] 8xx: Misc fixes for buggy insn Joakim Tjernlund
2009-11-04 13:38 ` [PATCH 1/8] 8xx: invalidate non present TLBs Joakim Tjernlund
2009-11-04 13:38 ` [PATCH 2/8] 8xx: Update TLB asm so it behaves as linux mm expects Joakim Tjernlund
2009-11-04 13:38 ` [PATCH 3/8] 8xx: Tag DAR with 0x00f0 to catch buggy instructions Joakim Tjernlund
2009-11-04 13:38 ` [PATCH 4/8] 8xx: Fixup DAR from buggy dcbX instructions Joakim Tjernlund
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