Messages in this thread | | | Date | Wed, 11 Feb 2009 13:48:02 +0100 | From | Ingo Molnar <> | Subject | Re: [PARAVIRT/x86] BUGFIX: Put a missing paravirt_release_pmd in pgd_dtor |
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* Alok Kataria <akataria@vmware.com> wrote:
> On Mon, 2009-02-09 at 04:10 -0800, Ingo Molnar wrote: > > > > > Applied to tip:x86/urgent, thanks guys! > > Thanks Ingo, > > I gave the tip tree a spin today and hit this bug. > > BUG: unable to handle kernel NULL pointer dereference at (null) > IP: [<(null)>] (null) > *pdpt = 0000000000839001 *pde = 0000000000c97067 *pte = 0000000000000163 > Oops: 0000 [#1] SMP > last sysfs file: > Modules linked in: > > Pid: 1, comm: swapper Not tainted (2.6.29-rc4-tip #18) VMware Virtual > Platform > EIP: 0062:[<00000000>] EFLAGS: 00010293 CPU: 0 > EIP is at 0x0 > EAX: 00000001 EBX: 00006000 ECX: c077ed00 EDX: 00006000 > ESI: 00000001 EDI: 00000001 EBP: ef04cf40 ESP: ef04cf1c > DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 006a > Process swapper (pid: 1, ti=ef04c000 task=ef050000 task.ti=ef04c000) > Stack: > c0644e52 00000000 ef04cf24 ef04cf24 c064468d c0886dc0 00000000 c0702aea > ef055480 00000001 00000101 dead4ead ffffffff ffffffff c08af530 00000000 > c0709715 ef04cf60 ef04cf60 00000001 00000000 00000000 dead4ead ffffffff > Call Trace: > [<c0644e52>] ? native_cpu_up+0x2de/0x45b > [<c064468d>] ? do_fork_idle+0x0/0x19 > [<c0645c5e>] ? _cpu_up+0x88/0xe8 > [<c0645d20>] ? cpu_up+0x42/0x4e > [<c07e7462>] ? kernel_init+0x99/0x14b > [<c07e73c9>] ? kernel_init+0x0/0x14b > [<c040375f>] ? kernel_thread_helper+0x7/0x10 > Code: Bad EIP value. > EIP: [<00000000>] 0x0 SS:ESP 006a:ef04cf1c
This is the crash fixed by your later genapic patch, right?
> This happens with out the fix too. So was wondering if there is any > other known bug in the tip tree. > Also note that i synced to the mainline tree (29-rc4) and that works > fine. So this only exists in tip. > I will debug this later today, but if anyone has any ideas about this > bug do let me know. > > And ya i also had to apply this patch to get tip to compile.
yes, that should be fixed too - it appeared briefly.
Let me know if you can see any problems with the latest -tip tree.
Ingo
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