From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Ingo Molnar <mingo@elte.hu>,
the arch/x86 maintainers <x86@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Xen-devel <xen-devel@lists.xensource.com>,
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Subject: Re: [PATCH 6/8] x86: use flush_tlb_others to implement flush_tlb_all
Date: Fri, 08 May 2009 08:49:54 -0700 [thread overview]
Message-ID: <4A0454A2.7060104@goop.org> (raw)
In-Reply-To: <1241796269.15972.41.camel@zakaz.uk.xensource.com>
Ian Campbell wrote:
> On Thu, 2009-05-07 at 13:25 -0700, Jeremy Fitzhardinge wrote:
>
>> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
>>
>> Use the flush_tlb_others() call to implement flush_tlb_all().
>>
>
> This causes:
> BUG: spinlock bad magic on CPU#0, swapper/0
> lock: c05b7588, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
> Pid: 0, comm: swapper Not tainted 2.6.30-rc3-x86_32p-xen0-tip-01797-g3db7847 #1054
> Call Trace:
> [<c023e656>] spin_bug+0x96/0xf0
> [<c023e90f>] _raw_spin_lock+0x6f/0x150
>
Ah, right. I had another change (somewhere around here) to explicitly
initialize the tlb flush code from the normal early init code, rather
than make it implicit via initcall. Otherwise we have an unknown point
at which we're allowed to start using global flushes, which is a bit flakey.
J
next prev parent reply other threads:[~2009-05-08 15:50 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-07 20:24 [GIT PULL] Xen core updates Jeremy Fitzhardinge
2009-05-07 20:24 ` [PATCH 1/8] xen/x86-64: fix breakpoints and hardware watchpoints Jeremy Fitzhardinge
2009-05-07 20:24 ` [PATCH 2/8] xen/x86-64: clean up warnings about IST-using traps Jeremy Fitzhardinge
2009-05-07 20:24 ` [PATCH 3/8] xen: cache cr0 value to avoid trap'n'emulate for read_cr0 Jeremy Fitzhardinge
2009-05-07 20:24 ` [PATCH 4/8] xen: deal with NMI's use of IST too Jeremy Fitzhardinge
2009-05-07 20:24 ` [PATCH 5/8] xen/i386: make sure initial VGA/ISA mappings are not overridden Jeremy Fitzhardinge
2009-05-08 10:57 ` Ingo Molnar
2009-05-08 15:08 ` Jeremy Fitzhardinge
2009-05-07 20:25 ` [PATCH 6/8] x86: use flush_tlb_others to implement flush_tlb_all Jeremy Fitzhardinge
2009-05-08 15:24 ` Ian Campbell
2009-05-08 15:49 ` Jeremy Fitzhardinge [this message]
2009-05-08 15:52 ` Ian Campbell
2009-05-11 13:09 ` [tip:x86/xen] x86: use flush_tlb_others to implement flush_tlb_all, fix tip-bot for Ian Campbell
2009-05-11 13:12 ` Ingo Molnar
2009-05-11 15:00 ` Ian Campbell
2009-05-11 15:11 ` Ingo Molnar
2009-05-11 15:39 ` Ian Campbell
2009-05-11 15:42 ` Ingo Molnar
2009-05-11 15:59 ` Ian Campbell
2009-05-11 15:40 ` Ingo Molnar
2009-05-11 15:06 ` tip-bot for Ian Campbell
2009-05-07 20:25 ` [PATCH 7/8] xen/i386: reserve Xen pagetables Jeremy Fitzhardinge
2009-05-07 20:25 ` [PATCH 8/8] xen: reserve Xen start_info rather than e820 reserving Jeremy Fitzhardinge
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