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    SubjectRe: 2.6.19-rc5-mm1
    Date
    On Thursday, 9 November 2006 01:55, Andrew Morton wrote:
    > On Thu, 9 Nov 2006 01:44:53 +0100
    > "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
    >
    > > On Thursday, 9 November 2006 01:17, Andrew Morton wrote:
    > > > On Thu, 9 Nov 2006 00:31:34 +0100
    > > > "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
    > > >
    > > > > On Wednesday, 8 November 2006 10:54, Andrew Morton wrote:
    > > > > >
    > > > > > Temporarily at
    > > > > >
    > > > > > http://userweb.kernel.org/~akpm/2.6.19-rc5-mm1/
    > > > > >
    > > > > > will turn up at
    > > > > >
    > > > > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.19-rc5/2.6.19-rc5-mm1/
    > > > > >
    > > > > > when kernel.org mirroring catches up.
    > > > > >
    > > > > >
    > > > > >
    > > > > > - Merged the Kernel-based Virtual Machine patches. See kvm.sf.net for
    > > > > > userspace tools, instructions, etc.
    > > > > >
    > > > > > It needs a recent binutils to build.
    > > > > >
    > > > > > - The hrtimer+dynticks code still doesn't work right for machines which halt
    > > > > > their TSC in low-power states.
    > > > >
    > > > > On my HPC nx6325 it doesn't even reach the point in which the messages become
    > > > > visible on the console, so I'm unable to get any debug info from it.
    > > >
    > > > Nice. You're using earlyprintk?
    > >
    > > earlyprintk=vga doesn't show anything (ie. blank screen), so it seems to crash
    > > really early.
    >
    > OK, so it's definitely bisection time.

    Well, I've got some data from earlyprintk (forgot I needed to boot with
    vga=normal).

    Unfortunately, I had to rewrite the trace manually:

    clear_IO_APIC_pin+0x15/0x6a
    try_apic_pin+0x7a/0x98
    setup_IO_APIC+0x600/0xb7a
    smp_prepare_cpus+0x33a/0x371
    init+0x60/0x32d
    child_rip+0xa/0x12

    [And then the unwinder said it got stuck.]

    RIP is reported to be at ioapic_read_entry+0x33/0x61, which according to gdb
    is:

    0xffffffff80271418 is in ioapic_read_entry (include/asm/io.h:204).
    199
    200 #define mmiowb()
    201
    202 static inline void __writel(__u32 b, volatile void __iomem *addr)
    203 {
    204 *(__force volatile __u32 *)addr = b;
    205 }
    206 static inline void __writeq(__u64 b, volatile void __iomem *addr)
    207 {
    208 *(__force volatile __u64 *)addr = b;

    > > I'm unable to reproduce the problem on a non-SMP box (Asus L5D), which works
    > > just fine with this kernel,

    Well, it's booted with 'noapic', so no wonder ...

    > > but on the other SMP box the framebuffer is broken
    > > (displays all fonts inverted, as in a mirror)
    >
    > Which fbdev driver? (suspect fbcon-rere-fix-little-endian-bogosity-in-slow_imageblit.patch)

    vga=792

    > > and the kernel says it cannot mount the root fs (which is on an md-raid).
    >
    > hm, there was probably some earlier message which tells us why that
    > happened. Doing a capure-and-compare on the dmesg output would be nice
    > (netconsole?)

    Tomorrow I'll try a serial one, but now I must get some sleep (I can hardly
    see anything).
    -
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