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Re: [Qemu-devel] commit 67feec6ed854b3618b37ccf050b90192cbb96e0f breaks


From: Gleb Natapov
Subject: Re: [Qemu-devel] commit 67feec6ed854b3618b37ccf050b90192cbb96e0f breaks compilation of hw/pci.c
Date: Wed, 25 Jan 2012 13:28:09 +0200

On Wed, Jan 25, 2012 at 12:22:51PM +0100, address@hidden wrote:
> Hi all,
> 
> from the qemu-kvm master I did some bisectioning because I cannot compile it.
> 
I got the same error because of some stale .h file. Removing it resolved
the problem, but I do not remember what was the file exactly. Try "git
status"

> My error is:
> 
> In file included from /home/erik/qemu-kvm/hw/pci.c:36:
> /qmp-commands.h:3: error: expected identifier or '(' before '{' token
> /qmp-commands.h:10: error: expected identifier or '(' before ',' token
> /qmp-commands.h:20: error: expected identifier or '(' before ',' token
> /qmp-commands.h:30: error: expected identifier or '(' before ',' token
> /qmp-commands.h:40: error: expected identifier or '(' before ',' token
> /qmp-commands.h:50: error: expected identifier or '(' before ',' token
> /qmp-commands.h:60: error: expected identifier or '(' before ',' token
> /qmp-commands.h:70: error: expected identifier or '(' before ',' token
> /qmp-commands.h:80: error: expected identifier or '(' before ',' token
> /qmp-commands.h:90: error: expected identifier or '(' before ',' token
> /qmp-commands.h:100: error: expected identifier or '(' before ',' token
> /qmp-commands.h:110: error: expected identifier or '(' before ',' token
> /qmp-commands.h:120: error: expected identifier or '(' before ',' token
> /qmp-commands.h:130: error: expected identifier or '(' before ',' token
> /qmp-commands.h:140: error: expected identifier or '(' before ',' token
> /qmp-commands.h:154: error: expected identifier or '(' before ',' token
> /qmp-commands.h:164: error: expected identifier or '(' before ',' token
> /qmp-commands.h:174: error: expected identifier or '(' before ',' token
> /qmp-commands.h:184: error: expected identifier or '(' before ',' token
> /qmp-commands.h:194: error: expected identifier or '(' before ',' token
> /qmp-commands.h:204: error: expected identifier or '(' before ',' token
> /qmp-commands.h:214: error: expected identifier or '(' before ',' token
> /qmp-commands.h:224: error: expected identifier or '(' before ',' token
> /qmp-commands.h:233: error: expected identifier or '(' before ',' token
> /qmp-commands.h:244: error: expected identifier or '(' before ',' token
> /qmp-commands.h:254: error: expected identifier or '(' before ',' token
> /qmp-commands.h:264: error: expected identifier or '(' before ',' token
> /qmp-commands.h:274: error: expected identifier or '(' before ',' token
> /qmp-commands.h:284: error: expected identifier or '(' before ',' token
> /qmp-commands.h:294: error: expected identifier or '(' before ',' token
> /qmp-commands.h:304: error: expected identifier or '(' before ',' token
> /qmp-commands.h:314: error: expected identifier or '(' before ',' token
> /qmp-commands.h:323: error: expected identifier or '(' before ',' token
> /qmp-commands.h:333: error: expected identifier or '(' before ',' token
> /home/erik/qemu-kvm/hw/pci.c:1432: warning: no previous prototype for
> 'qmp_query_pci'
> 
> 
> Here the results of the bisectioning (master against qemu-kvm-1.0)
> 
> git bisect start
> # bad: [07e1e20b47d3e7841dc63a843502600d0a16542f] qemu-kvm: Resolve
> unneeded diffs to upstream in pc-bios
> git bisect bad 07e1e20b47d3e7841dc63a843502600d0a16542f
> # good: [30c044521889195f54a9f2c21310894f545994e8] Merge commit 'v1.0' into
> next
> git bisect good 30c044521889195f54a9f2c21310894f545994e8
> # good: [b9b2008bbff49e2714491a95109e1189e54a6491] block: dma_bdrv_* does
> not return NULL
> git bisect good b9b2008bbff49e2714491a95109e1189e54a6491
> # good: [05c194384f836240ea4c2da5fa3be43a54bff021] pseries: Emit device
> tree nodes in reg order
> git bisect good 05c194384f836240ea4c2da5fa3be43a54bff021
> # bad: [372951014b5008ca047e4dfbfaf4003bc27a2f6b] qemu-kvm: Fix
> save/restore of in-kernel i8259
> git bisect bad 372951014b5008ca047e4dfbfaf4003bc27a2f6b
> # bad: [682a3c07f0e28d2532c911a44a9b6142d6299cc2] Merge commit
> 'c5705a7728b4a6bc9e4f2d35911adbaf28042b25' into upstream-merge
> git bisect bad 682a3c07f0e28d2532c911a44a9b6142d6299cc2
> # good: [2817b260e3ca57ee091fc56403bfafdcc18b6a96] vhost: avoid
> cpu_get_physical_page_desc()
> git bisect good 2817b260e3ca57ee091fc56403bfafdcc18b6a96
> # bad: [ce00ce6a909bc9b1ecc697d826d71b2c7ab07994] Merge commit
> '48a18b3c698295e4d891f34e919615e84e20f027' into upstream-merge
> git bisect bad ce00ce6a909bc9b1ecc697d826d71b2c7ab07994
> # bad: [90695ad2ede04a7ce6a86e8283e82f8bdbe8a54a] Merge commit
> '217bfb445b54db618a30f3a39170bebd9fd9dbf2' into upstream-merge
> git bisect bad 90695ad2ede04a7ce6a86e8283e82f8bdbe8a54a
> # bad: [e021b07bd795c76035c48c158943dd8ee47e9c27] qemu-kvm: Move
> make-release to scripts/qemu-kvm
> git bisect bad e021b07bd795c76035c48c158943dd8ee47e9c27
> # bad: [67feec6ed854b3618b37ccf050b90192cbb96e0f] qemu-kvm: fix improper
> nmi emulation
> git bisect bad 67feec6ed854b3618b37ccf050b90192cbb96e0f
> 
> final git bisect result:
> 
> 67feec6ed854b3618b37ccf050b90192cbb96e0f is the first bad commit
> commit 67feec6ed854b3618b37ccf050b90192cbb96e0f
> Author: Lai Jiangshan <address@hidden>
> Date:   Tue Oct 18 00:00:06 2011 +0800
> 
>     qemu-kvm: fix improper nmi emulation
> 
>     Currently, NMI interrupt is blindly sent to all the vCPUs when NMI
>     button event happens. This doesn't properly emulate real hardware on
>     which NMI button event triggers LINT1. Because of this, NMI is sent to
>     the processor even when LINT1 is maskied in LVT. For example, this
>     causes the problem that kdump initiated by NMI sometimes doesn't work
>     on KVM, because kdump assumes NMI is masked on CPUs other than CPU0.
> 
>     With this patch, inject-nmi request is handled as follows.
> 
>     - When in-kernel irqchip is disabled, deliver LINT1 instead of NMI
>       interrupt.
>     - When in-kernel irqchip is enabled, get the in-kernel LAPIC states
>       and test the APIC_LVT_MASKED, if LINT1 is unmasked, and then
>       delivering the NMI directly. (Suggested by Jan Kiszka)
> 
>     Changed from old version:
>       re-implement it by the Jan's suggestion.
>       fix the race found by Jan.
> 
>     Signed-off-by: Lai Jiangshan <address@hidden>
>     Reported-by: Kenji Kaneshige <address@hidden>
>     Signed-off-by: Avi Kivity <address@hidden>
> 
> :040000 040000 c9ff9b464fff2c08d8a492fb780504df5bdd5ddb
> d0f864ba68472983065f8f2cfa53cdf04c5aed62 M      hw
> :100644 100644 f956eb7e867927f1d223070a49acf65ed13deb85
> 92ac4533c2b6d40a0ccb2f04981f6c32a4f560da M    
> 
> 
> Best regards,
> 
> Erik
> 
> 

--
                        Gleb.



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