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2013-04-01qemu vfio-pci: Add support for VGA MMIO and I/O port accessAlex Williamson1-0/+169
Most VGA cards need some kind of quirk to fully operate since they hide backdoors to get to other registers outside of PCI config space within the registers, but this provides the base infrastructure. If we could identity map PCI resources for assigned devices we would need a lot fewer quirks. To enable this, use a kernel side vfio-pci driver that incorporates VGA support (v3.9), and use the -vga none option and add the x-vga=on option for the vfio-pci device. The "x-" denotes this as an experimental feature. You may also need to use a cached copy of the VGA BIOS for your device, passing it to vfio-pci using the romfile= option. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2013-04-01vfio-pci: Add PCIe capability mangling based on bus typeAlex Williamson1-1/+128
Windows seems to pay particular interest to the PCIe header type of devices and will fail to load drivers if we attach Endpoint devices or Legacy Endpoint devices to the Root Complex. We can use pci_bus_is_express and pci_bus_is_root to determine the bus type and mangle the type appropriately: * Legacy PCI * No change, capability is unmodified for compatibility. * PCI Express * Integrated Root Complex Endpoint -> Endpoint * PCI Express Root Complex * Endpoint -> Integrated Root Complex Endpoint * Legacy Endpoint -> none, capability hidden We also take this opportunity to explicitly limit supported devices to Endpoints, Legacy Endpoints, and Root Complex Integrated Endpoints. We don't currently have support for other types and users often cause themselves problems by assigning them. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2013-04-01vfio-pci: Generalize PCI config manglingAlex Williamson1-38/+42
Kernel-side vfio virtualizes all of config space, but some parts are unique to Qemu. For instance we may or may not expose the ROM BAR, Qemu manages MSI/MSIX, and Qemu manages the multi-function bit so that single function devices can appear as multi-function and vica versa. Generalize this into a bitmap of Qemu emulated bits. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2013-04-01linux-headers: Update to v3.9-rc2Alex Williamson1-0/+9
Unedited scripts/update-linux-headers.sh run against v3.9-rc2 tag Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2013-04-01tcg/mips: Implement muls2_i32Aurelien Jarno2-1/+7
Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.2: use clz32/ctz32 instead of reinventing the wheelAurelien Jarno2-30/+3
Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: enable SSE4.1 and SSE4.2 in TCG modeAurelien Jarno1-6/+7
Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.2: fix pcmpXstrX instructions with "Masked(-)" polarityAurelien Jarno1-1/+1
valids can equals to -1 if the reg/mem string is empty. Change the expression to have an empty xor mask in that case. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.2: fix pcmpXstrX instructions in "Equal ordered" modeAurelien Jarno1-2/+3
The inner loop should only change the current bit of the result, instead of the whole result. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.2: fix pcmpXstrX instructions in "Equal each" modeAurelien Jarno1-1/+1
pcmpXstrX instructions in "Equal each" mode force both invalid element pair to true. It means (upper - MAX(valids, validd)) bits should be set to 1, not (upper - MAX(valids, validd) + 1). Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.2: fix pcmpXstrX instructions in "Ranges" modeAurelien Jarno1-2/+2
Fix the order of the of the comparisons to match the "Intel 64 and IA-32 Architectures Software Developer's Manual". Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.2: fix pcmpXstrm instructionsAurelien Jarno1-8/+8
pcmpXstrm instructions returns their result in the XMM0 register and not in the first operand. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.2: fix pcmpXstri instructionsAurelien Jarno1-2/+2
ffs1 returns the first bit set to one starting counting from the most significant bit. pcmpXstri returns the most significant bit set to one, starting counting from the least significant bit. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.2: fix pcmpgtq instructionAurelien Jarno1-2/+1
The "Intel 64 and IA-32 Architectures Software Developer's Manual" (at least recent versions) clearly says that the comparison is signed. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01target-i386: SSE4.1: fix pinsrb instructionAurelien Jarno1-2/+2
gen_op_mov_TN_reg() loads the value in cpu_T[0], so this temporary should be used instead of cpu_tmp0. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-01Merge remote-tracking branch 'stefanha/trivial-patches' into stagingAnthony Liguori4-56/+58
# By Dunrong Huang (1) and others # Via Stefan Hajnoczi * stefanha/trivial-patches: hw/tcx: Remove unused 'addr' field and the property that sets it hw/i386/pc: format load_linux function configure: show debug-info option in --help output
2013-04-01sysbus: Remove sysbus_add_memory and sysbus_del_memoryPeter Maydell2-23/+0
Remove the sysbus_add_memory and sysbus_del_memory functions. These are trivial wrappers for mapping a memory region into the system memory space, and have no users now. Sysbus devices should never map their own memory regions anyway; the correct API for mapping an mmio region is for the creator of the device to use sysbus_mmio_map. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Andreas Färber <afaerber@suse.de> Message-id: 1363358063-23973-6-git-send-email-peter.maydell@linaro.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-01hw/milkymist-softusb: set buffer in softusb_read_{dmem, pmem} error pathPeter Maydell1-0/+2
Make sure we set the buffer to something in the softusb_read_{dmem,pmem} error paths, since the caller will use the buffer unconditionally. (Newer gcc is smart enough to spot this and complain about 'may be used uninitialized'.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1364496184-11994-1-git-send-email-peter.maydell@linaro.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-01milkymist-softusb: Don't map RAM memory regions in the device itselfPeter Maydell2-12/+13
Don't map the pmem and dmem RAM memory regions in the milkymist-softusb device itself. Instead just expose them as sysbus mmio regions which the device creator can map appropriately. This allows us to drop the pmem_base and dmem_base properties. Instead of going via cpu_physical_memory_read/_write when the device wants to access the RAMs, we just keep a host pointer to the memory and use that. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Andreas Färber <afaerber@suse.de> Acked-by: Michael Walle <michael@walle.cc> Message-id: 1363358063-23973-5-git-send-email-peter.maydell@linaro.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-01milkymist-minimac2: Just expose buffers as a sysbus mmio regionPeter Maydell2-5/+2
Just expose the register buffers memory as a standard sysbus mmio region which the creator of the device can map, rather than providing a qdev property which the creator has to set to the base address and then doing the mapping in the device's own init function. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Andreas Färber <afaerber@suse.de> Acked-by: Michael Walle <michael@walle.cc> Message-id: 1363358063-23973-4-git-send-email-peter.maydell@linaro.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-01musicpal: qdevify musicpal-miscPeter Maydell1-5/+23
Make musicpal-misc into its own (trivial) qdev device, so we can get rid of the abuse of sysbus_add_memory(). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Message-id: 1363358063-23973-3-git-send-email-peter.maydell@linaro.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-01sysbus: make SysBusDeviceClass::init optionalPeter Maydell1-0/+3
Make the SysBusDeviceClass::init optional, for devices which genuinely don't need to do anything here. In particular, simple devices which can do all their initialization in their instance_init method don't need either a DeviceClass::realize or SysBusDeviceClass::init method. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Message-id: 1363358063-23973-2-git-send-email-peter.maydell@linaro.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-31target-moxie: set do_interrupt to a target-specific helper functionDunrong Huang3-3/+7
The value of "do_interrupt" member of CPUClass shoule be set to a target-specific function, or it will lead to a segfault like below: $ moxie-softmmu/qemu-system-moxie -M moxiesim Segmentation fault Cc: Anthony Green <green@moxielogic.com> Cc: Blue Swirl <blauwirbel@gmail.com> Cc: Andreas Färber <afaerber@suse.de> Signed-off-by: Dunrong Huang <huangdr@cloud-times.com> Signed-of-by: Anthony Green <green@moxielogic.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-30w32: Fix build with older gcc (unresolved symbol)Stefan Weil1-0/+5
The cross i586-mingw32msvc-gcc 4.4.4 from Debian Squeeze does not support __sync_val_compare_and_swap by default. Using -march=i686 fixes that and should also result in better code. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-30target-moxie: Fix pointer-to-integer conversion (MinGW-w64)Stefan Weil1-1/+1
The type cast must use tcg_target_long instead of long. This makes a difference for hosts where sizeof(long) != sizeof(void *). Cc: Anthony Green <green@moxielogic.com> Cc: Blue Swirl <blauwirbel@gmail.com> Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Anthony Green <green@moxielogic.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-28piix_pci: Fix C99 commentsDavid Woodhouse1-4/+6
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Tested-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Message-id: 1361580039-4459-4-git-send-email-dwmw2@infradead.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28piix_pci: Use DEVICE() and ISA_BUS()David Woodhouse1-3/+2
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Tested-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Message-id: 1361580039-4459-3-git-send-email-dwmw2@infradead.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28piix_pci: Clean up i440FX object handlingDavid Woodhouse1-5/+10
Define and use I440FX_PCI_DEVICE() instead of using DO_UPCAST(). Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Tested-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Message-id: 1361580039-4459-2-git-send-email-dwmw2@infradead.org Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28qemu-bridge-helper: force usage of a very high MAC address for the bridgePaolo Bonzini1-0/+18
Linux uses the lowest enslaved MAC address as the MAC address of the bridge. Set MAC address to a high value so that it does not affect the MAC address of the bridge. Changing the MAC address of the bridge could cause a few seconds of network downtime. Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1363971468-21154-1-git-send-email-pbonzini@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28virtio-balloon: cleanup: remove qdev field.KONRAD Frederic2-2/+0
The qdev field is no longer needed, just drop it. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Message-id: 1364377755-15508-7-git-send-email-fred.konrad@greensocs.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28virtio-balloon: cleanup: QOM casts.KONRAD Frederic2-24/+21
As the virtio-balloon-pci is switched to the new API, we can use QOM casts. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Message-id: 1364377755-15508-6-git-send-email-fred.konrad@greensocs.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28virtio-balloon: cleanup: init and exit function.KONRAD Frederic1-60/+13
This remove old init and exit function as they are no longer needed. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Message-id: 1364377755-15508-5-git-send-email-fred.konrad@greensocs.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28virtio-balloon-ccw: switch to the new API.KONRAD Frederic2-11/+25
Here the virtio-balloon-ccw is modified for the new API. The device virtio-balloon-ccw extends virtio-ccw-device as before. It creates and connects a virtio-balloon during the init. The properties are not modified. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Message-id: 1364377755-15508-4-git-send-email-fred.konrad@greensocs.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28virtio-balloon-pci: switch to the new API.KONRAD Frederic2-56/+69
Here the virtio-balloon-pci is modified for the new API. The device virtio-balloon-pci extends virtio-pci. It creates and connects a virtio-balloon during the init. The properties are not changed. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Message-id: 1364377755-15508-3-git-send-email-fred.konrad@greensocs.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28virtio-balloon: add the virtio-balloon device.KONRAD Frederic2-6/+93
Create virtio-balloon which extends virtio-device, so it can be connected on virtio-bus. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Message-id: 1364377755-15508-2-git-send-email-fred.konrad@greensocs.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-03-28Merge remote-tracking branch 'stefanha/block' into stagingAnthony Liguori11-176/+553
# By Kevin Wolf (22) and Peter Lieven (1) # Via Stefan Hajnoczi * stefanha/block: (23 commits) block: Fix direct use of protocols as driver for bdrv_open() qcow2: Gather clusters in a looping loop qcow2: Move cluster gathering to a non-looping loop qcow2: Allow requests with multiple l2metas qcow2: Use byte granularity in qcow2_alloc_cluster_offset() qcow2: Prepare handle_alloc/copied() for byte granularity qcow2: handle_copied(): Implement non-zero host_offset qcow2: handle_copied(): Get rid of keep_clusters parameter qcow2: handle_copied(): Get rid of nb_clusters parameter qcow2: Factor out handle_copied() qcow2: Clean up handle_alloc() qcow2: Finalise interface of handle_alloc() qcow2: handle_alloc(): Get rid of keep_clusters parameter qcow2: handle_alloc(): Get rid of nb_clusters parameter qcow2: Factor out handle_alloc() qcow2: Decouple cluster allocation from cluster reuse code qcow2: Change handle_dependency to byte granularity qcow2: Improve check for overlapping allocations qcow2: Handle dependencies earlier qcow2: Remove bogus unlock of s->lock ...
2013-03-28Merge remote-tracking branch 'stefanha/tracing' into stagingAnthony Liguori26-180/+595
# By Lluís Vilanova (7) and others # Via Stefan Hajnoczi * stefanha/tracing: vl: add runstate_set tracepoint .gitignore: rename trace/generated-tracers.dtrace .gitignore: add trace/generated-events.[ch] trace: rebuild generated-events.o when configuration changes trace: [stderr] Port to generic event information and new control interface trace: [simple] Port to generic event information and new control interface trace: [default] Port to generic event information and new control interface trace: [monitor] Use new event control interface trace: Provide a detailed event control interface trace: Provide a generic tracing event descriptor trace: [tracetool] Explicitly identify public backends
2013-03-28vl: add runstate_set tracepointKazuya Saito2-1/+2
This patch enables us to know RunState transition. It will be userful for investigation when the trouble occured in special event such like live migration, shutdown, suspend, and so on. Signed-off-by: Kazuya Saito <saito.kazuya@jp.fujitsu.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28.gitignore: rename trace/generated-tracers.dtraceStefan Hajnoczi1-1/+1
For a while the file was called trace/generated-tracers-dtrace.dtrace but today it's called trace/generated-tracers.dtrace. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28.gitignore: add trace/generated-events.[ch]Stefan Hajnoczi1-0/+2
Don't display autogenerated files in git-status(1). Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: rebuild generated-events.o when configuration changesStefan Hajnoczi1-1/+1
Make sure to rebuild generated-events.o when ./configure options change. This prevents linker errors when a stale generated-events.o gets linked with code compiled against fresh headers. For example, try building with ./configure --enable-trace-backend=stderr followed by ./configure --enable-trace-backend=dtrace. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: [stderr] Port to generic event information and new control interfaceLluís Vilanova3-58/+14
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: [simple] Port to generic event information and new control interfaceLluís Vilanova3-46/+13
The backend is forced to dump event numbers using 64 bits, as TraceEventID is an enum. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: [default] Port to generic event information and new control interfaceLluís Vilanova1-3/+2
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: [monitor] Use new event control interfaceLluís Vilanova1-2/+11
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: Provide a detailed event control interfaceLluís Vilanova4-58/+349
This interface decouples event obtaining from interaction. Events can be obtained through three different methods: * identifier * name * simple wildcard pattern Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: Provide a generic tracing event descriptorLluís Vilanova7-9/+172
Uses tracetool to generate a backend-independent tracing event description (struct TraceEvent). The values for such structure are generated with the non-public "events" backend ("events-c" frontend). The generation of the defines to check if an event is statically enabled is also moved to the "events" backend ("events-h" frontend). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: [tracetool] Explicitly identify public backendsLluís Vilanova6-3/+30
Public backends are those printed by "--list-backends" and thus considered valid by the configure script. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28block: Fix direct use of protocols as driver for bdrv_open()Kevin Wolf1-11/+15
bdrv_open_common() implements direct use of protocols by copying the pre-opened BlockDriverStates to bs using bdrv_swap(). It did however first set some fields in bs, which end up in file after the swap. When bdrv_open() destroys file, it appears to be open, and because it isn't, qemu could segfault while trying to close it. Reorder the operations to return immediately in such cases so that file is correctly detected as closed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28qcow2: Gather clusters in a looping loopKevin Wolf2-32/+44
Instead of just checking once in exactly this order if there are dependendies, non-COW clusters and new allocation, this starts looping around these. This way we can, for example, gather non-COW clusters after new allocations as long as the host cluster offsets stay contiguous. Once handle_dependencies() is extended so that COW areas of in-flight allocations can be overwritten, this allows to continue with gathering other clusters (we wouldn't be able to do that without this change because we would have missed a possible second dependency in one of the next clusters). This means that in the typical sequential write case, we can combine the COW overwrite of one cluster with the allocation of the next cluster as soon as something like Delayed COW gets actually implemented. It is only by avoiding splitting requests this way that Delayed COW actually starts improving performance noticably. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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