search for: xs_reset_watch

Add xs_reset_watches function to shutdown watches from old kernel after kexec boot. The old kernel does not unregister all watches in the shutdown path. They are still active, the double registration can not be detected by the new kernel. When the watches fire, unexpected events will arrive and the xenwatch thread...

# HG changeset patch # User Olaf Hering <olaf@aepfle.de> # Date 1325788840 -3600 # Node ID 2f5a98692acde9e74d4009f50f83a8aa08296310 # Parent 3a22ed3ec534799b3cab55b0dc0a7380e701ecbe add feature flag to xenstore for XS_RESET_WATCHES Tell guest about availibilty of xenstoreds XS_RESET_WATCHES function. Guests can not issue this command unconditionally because some buggy toolstacks (such as EC2) do not ignore unknown commands properly. Signed-off-by: Olaf Hering <olaf@aepfle.de> diff -r 3a22ed3ec534 -r 2f5a98692acd to...

The following series improves kexec in a Xen PVonHVM guest. It is available via git: git://github.com/olafhering/linux.git xen-kexec-XS_RESET_WATCHES-3.0 A new xenstored command XS_RESET_WATCHES has been added in xen-unstable.hg changeset 23839:42a45baf037d. The command removes all watches and transactions for the guest. The following patches make use of the new command to wipe all existing watches during startup. Olaf Olaf Hering (2): xe...

..._watch(const char *token) return NULL; } + /* * Certain older XenBus toolstack cannot handle reading values that are * not populated. Some Xen 3.4 installation are incapable of doing this * so if we are running on anything older than 4 do not attempt to read * control/platform-feature-xs_reset_watches. */ -static bool xen_strict_xenbus_quirk() +static bool xen_strict_xenbus_quirk(void) { uint32_t eax, ebx, ecx, edx, base; @@ -635,8 +636,8 @@ static bool xen_strict_xenbus_quirk() if ((eax >> 16) < 4) return true; return false; - } + static void xs_reset_watches(void) {...

..._watch(const char *token) return NULL; } + /* * Certain older XenBus toolstack cannot handle reading values that are * not populated. Some Xen 3.4 installation are incapable of doing this * so if we are running on anything older than 4 do not attempt to read * control/platform-feature-xs_reset_watches. */ -static bool xen_strict_xenbus_quirk() +static bool xen_strict_xenbus_quirk(void) { uint32_t eax, ebx, ecx, edx, base; @@ -635,8 +636,8 @@ static bool xen_strict_xenbus_quirk() if ((eax >> 16) < 4) return true; return false; - } + static void xs_reset_watches(void) {...

Currently PVHVM Linux guests after ddacf5ef684a "xen/pv-on-hvm kexec: add xs_reset_watches to shutdown watches from old kernel" hang when run against oxenstored because it does not handle the unknown XS_RESET_WATCHES operation and does not reply. The symptom of this issue is a hang during boot at this point: cpu 1 spinlock event irq 70 CPU 1 irqstacks, hard=dec94000 soft=...

...mu', 'cpu/0/availability': 'online', 'memory/target': '4194304', 'control/platform-feature-multiprocessor-suspend': '1', 'store/ring-ref': '1044476', 'cpu/1/availability': 'online', 'control/platform-feature-xs_reset_watches': '1', 'image/suspend-cancel': '1', 'name': 'migrating-fraapppeccon06.fra.net-m.internal'} [2014-11-06 22:53:01 13499] INFO (XendCheckpoint:423) xc_save: failed to get the suspend evtchn port [2014-11-06 22:53:01 13499] INFO (XendCheckpoint:423) [201...

.../local/domain/0/vm = "/vm/00000000-0000-0000-0000-000000000000" (r0) /local/domain/0/device = "" (n0) /local/domain/0/control = "" (n0) /local/domain/0/control/platform-feature-multiprocessor-suspend = "1" (n0) /local/domain/0/control/platform-feature-xs_reset_watches = "1" (n0) /local/domain/0/error = "" (n0) /local/domain/0/memory = "" (n0) /local/domain/0/memory/target = "2670332" (n0) /local/domain/0/memory/static-max = "4294967292" (n0) /local/domain/0/memory/freemem-slack = "165844"...

...ility'': ''online'', ''memory/target'': ''131072'', ''control/platform-feature-multiprocessor-suspend'': ''1'', ''store/ring-ref'': ''1044476'', ''control/platform-feature-xs_reset_watches'': ''1'', ''image/suspend-cancel'': ''1'', ''name'': ''Windows''} [2012-10-25 17:50:40 6523] DEBUG (DevController:63) 12345 DevController:createDevice [2012-10-25 17:50:40 6523] DEBUG (DevController:96) DevCon...

...3:55:59 xen kernel: devtmpfs: initialized Dec 29 23:55:59 xen kernel: pinctrl core: initialized pinctrl subsystem Dec 29 23:55:59 xen kernel: NET: Registered protocol family 16 Dec 29 23:55:59 xen kernel: NMI watchdog: disabled (cpu0): hardware events not enabled Dec 29 23:55:59 xen kernel: xenbus: xs_reset_watches failed: -38 Dec 29 23:55:59 xen kernel: cpuidle: using governor ladder Dec 29 23:55:59 xen kernel: cpuidle: using governor menu Dec 29 23:55:59 xen kernel: ACPI: bus type PCI registered Dec 29 23:55:59 xen kernel: acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 Dec 29 23:55:59 xen kerne...

...devtmpfs: initialized > Dec 29 23:55:59 xen kernel: pinctrl core: initialized pinctrl subsystem > Dec 29 23:55:59 xen kernel: NET: Registered protocol family 16 > Dec 29 23:55:59 xen kernel: NMI watchdog: disabled (cpu0): hardware events not enabled > Dec 29 23:55:59 xen kernel: xenbus: xs_reset_watches failed: -38 > Dec 29 23:55:59 xen kernel: cpuidle: using governor ladder > Dec 29 23:55:59 xen kernel: cpuidle: using governor menu > Dec 29 23:55:59 xen kernel: ACPI: bus type PCI registered > Dec 29 23:55:59 xen kernel: acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 >...

...d > > Dec 29 23:55:59 xen kernel: pinctrl core: initialized pinctrl subsystem > > Dec 29 23:55:59 xen kernel: NET: Registered protocol family 16 > > Dec 29 23:55:59 xen kernel: NMI watchdog: disabled (cpu0): hardware events not enabled > > Dec 29 23:55:59 xen kernel: xenbus: xs_reset_watches failed: -38 > > Dec 29 23:55:59 xen kernel: cpuidle: using governor ladder > > Dec 29 23:55:59 xen kernel: cpuidle: using governor menu > > Dec 29 23:55:59 xen kernel: ACPI: bus type PCI registered > > Dec 29 23:55:59 xen kernel: acpiphp: ACPI Hot Plug PCI Controller Drive...

*RESEND* due to exceeding the mailinglists limit for attachment size. Hi, I''m trying to get secondary vga-passthrough on a HVM guest to work with a AMD HD6570 and the native kernel radeon driver and kernel modesetting. So the guest still gets the emulated stdvga or cirrus device(used in my case here) as primary/boot vga adapter. - When i don''t passthrough the radeon card, the