xen in mainline linux status updatexen summit at oracle feb 24-25, 2009 git migration migrated...
TRANSCRIPT
![Page 1: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/1.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Xen in Mainline LinuxStatus Update
Jeremy FitzhardingeCitrix
![Page 2: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/2.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Upstreaming Xen● Xen domU support
– Upstream and stable for well over a year– Shipped as standard in several distros
● Fedora● Debian● ...?
– (SuSE is the odd one out.)● Dom0 support is the next frontier
![Page 3: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/3.jpg)
Xen Summit at Oracle Feb 24-25, 2009
git migration● Migrated upstream Xen work to git● Mercurial + patchqueue was getting awkward● Git makes is more conventional:
– Easier for upstream developers to work with– Easier for Xen developers to get a working tree
● Hosted on git.kernel.org: “jeremy/xen.git”
![Page 4: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/4.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Git Branches● Two main merge branches
– xen/master – core Xen, domU– xen/dom0/hackery – dom0 work branch
● Lots of topic branches– Merged into merge branches for use– Will add more as needed
● Room for lots more– Will take anything– Even merged if you don't break things!
![Page 5: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/5.jpg)
Xen Summit at Oracle Feb 24-25, 2009
General improvements● Preemptable lazy mmu updates
– Allow more use of lazy updates– Less scheduling effect
● /proc/xen + usermode xenbus for tools support● New calling convention for reduced register
pressure● Still need a concerted performance-oriented
push
![Page 6: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/6.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Paravirt performance● Early design goal of paravirt_ops was zero-
overhead native execution● Some benchmarking showed we were falling
short– ~5% impact on mmap heavy benchmark
● The problem: inlines -> function calls cause lots more register pressure
● Resulting in higher cache traffic due to spills
![Page 7: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/7.jpg)
Xen Summit at Oracle Feb 24-25, 2009
New calling convention● Solution: define new calling convention● Normal convention trashes many registers● Define new one which preserves everything
– Except return value● Result:
– compiler can generate better code– Inline patching more effective
● But how to call normal code?
![Page 8: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/8.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Generate reg-saver thunks● Add macro to generate register saving wrapper
around conventional code● Pushes cost of call to complex code● Simple callees – written in asm – need no
wrapper● Overall: reduce overhead to 1-2%
![Page 9: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/9.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom0● Boot-time control domain● Also basis for driver domains● At heart, a normal PV Xen domain● But with extra bits
– APIC– ACPI– Device mappings– DMA / SWIOTLB
![Page 10: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/10.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: APICs● APIC = interrupt controller● Two parts:
– IO APICs connected to PCI slots– Local ACPI in each CPU
● Xen owns Local APIC, since dom0 has virtualized CPUs
● Dom0 owns IO APICs because it has the device drivers
![Page 11: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/11.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: APICs (2)● Changes surprisingly small
– Some changes to APIC discovery to avoid local apics
– Hook acpi_register_gsi to direct all setup to Xen code
– Only support ACPI interrupt routing– IRQ space reserved for 1:1 GSI mapping
● Caveat: APIC and ACPI use different senses for interrupt triggering
– Getting it wrong works surprisingly well
![Page 12: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/12.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: ACPI● ACPI = Amazingly Complex Piece of Interface● Used for everything from device discovery,
interrupt routing to power management● To start with, mostly interested in devices and
interrupts● Main changes to APIC code were to make it
map properly● Seems well-behaved after that
![Page 13: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/13.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: device mappings● Dom0 kernel has two address spaces:
– Pseudo-physical domain memory– Machine-physical memory
● Must know which is which for any given mapping● Add _PAGE_IOMAP flag to mark hardware ptes
– No pfn->mfn conversion● VM_IO segments mapped with _PAGE_IOMAP● E820 map avoids RAM holes
![Page 14: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/14.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: DMA / SWIOTLB● Make sure devices are talking to the memory
they think they are● Hook DMA operations to
– Convert pfn<->mfn– Make memory machine contiguous
● SWIOTLB deals with a lot of the tricky cases– Involves copying, so should be avoided for high
performance devices
![Page 15: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/15.jpg)
Xen Summit at Oracle Feb 24-25, 2009
*** SUBJECT HERE ***
*** BLURB HERE ***
![Page 16: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/16.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: upstream progress● Most core patches posted, out for review● Looks good for next merge window (2.6.30)
– Core support at least– Not necessarily every feature
●
![Page 17: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/17.jpg)
Xen Summit at Oracle Feb 24-25, 2009
DEMO
![Page 18: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/18.jpg)
Xen Summit at Oracle Feb 24-25, 2009
State: Good● Generally very stable● AHCI, PIIX, mpt drive controllers work● E1000, iwlagn networking OK● Intel graphics fully accelerated
– Radeon X server starts OK too● Sound fine● USB good too● Oh, and you can start domains
![Page 19: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/19.jpg)
Xen Summit at Oracle Feb 24-25, 2009
State: Meh● S3 suspend not done● Cpufreq doesn't work● ACPI hotkeys seem dead● Need wider hardware testing for more
confidence● HVM was working, but now not (general xen-
unstable issue?)
![Page 20: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/20.jpg)
Xen Summit at Oracle Feb 24-25, 2009
TODO● Host S3 suspend resume
– Should just be a matter of bringing over patches– Upstreaming could be awkward
● MSI– Hoping its no more complex than APIC
● Pciback● Blktap2● Pvhvm support – started, need more work● Wider hardware testing
![Page 21: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/21.jpg)
Xen Summit at Oracle Feb 24-25, 2009
No Excuses● Now is the time to base development on the
mainline kernel● Core Xen support is stable● Dom0 support is fairly stable● Remaining work is in self-contained chunks
![Page 22: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/22.jpg)
Xen Summit at Oracle Feb 24-25, 2009
The Kittens are Thinking of You...
![Page 23: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/23.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Thanks!
GIT repository:git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
or...1. Go to git.kernel.org2. Look for “xen.git” on the page3. Cut long url4. git clone <paste> linux-xen
![Page 24: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/24.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Xen in Mainline LinuxStatus Update
Jeremy FitzhardingeCitrix
![Page 25: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/25.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Upstreaming Xen● Xen domU support
– Upstream and stable for well over a year– Shipped as standard in several distros
● Fedora● Debian● ...?
– (SuSE is the odd one out.)● Dom0 support is the next frontier
![Page 26: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/26.jpg)
Xen Summit at Oracle Feb 24-25, 2009
git migration● Migrated upstream Xen work to git● Mercurial + patchqueue was getting awkward● Git makes is more conventional:
– Easier for upstream developers to work with– Easier for Xen developers to get a working tree
● Hosted on git.kernel.org: “jeremy/xen.git”
![Page 27: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/27.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Git Branches● Two main merge branches
– xen/master – core Xen, domU– xen/dom0/hackery – dom0 work branch
● Lots of topic branches– Merged into merge branches for use– Will add more as needed
● Room for lots more– Will take anything– Even merged if you don't break things!
![Page 28: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/28.jpg)
Xen Summit at Oracle Feb 24-25, 2009
General improvements● Preemptable lazy mmu updates
– Allow more use of lazy updates– Less scheduling effect
● /proc/xen + usermode xenbus for tools support● New calling convention for reduced register
pressure● Still need a concerted performance-oriented
push
![Page 29: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/29.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Paravirt performance● Early design goal of paravirt_ops was zero-
overhead native execution● Some benchmarking showed we were falling
short– ~5% impact on mmap heavy benchmark
● The problem: inlines -> function calls cause lots more register pressure
● Resulting in higher cache traffic due to spills
![Page 30: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/30.jpg)
Xen Summit at Oracle Feb 24-25, 2009
New calling convention● Solution: define new calling convention● Normal convention trashes many registers● Define new one which preserves everything
– Except return value● Result:
– compiler can generate better code– Inline patching more effective
● But how to call normal code?
![Page 31: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/31.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Generate reg-saver thunks● Add macro to generate register saving wrapper
around conventional code● Pushes cost of call to complex code● Simple callees – written in asm – need no
wrapper● Overall: reduce overhead to 1-2%
![Page 32: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/32.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom0● Boot-time control domain● Also basis for driver domains● At heart, a normal PV Xen domain● But with extra bits
– APIC– ACPI– Device mappings– DMA / SWIOTLB
![Page 33: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/33.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: APICs● APIC = interrupt controller● Two parts:
– IO APICs connected to PCI slots– Local ACPI in each CPU
● Xen owns Local APIC, since dom0 has virtualized CPUs
● Dom0 owns IO APICs because it has the device drivers
![Page 34: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/34.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: APICs (2)● Changes surprisingly small
– Some changes to APIC discovery to avoid local apics
– Hook acpi_register_gsi to direct all setup to Xen code
– Only support ACPI interrupt routing– IRQ space reserved for 1:1 GSI mapping
● Caveat: APIC and ACPI use different senses for interrupt triggering
– Getting it wrong works surprisingly well
![Page 35: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/35.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: ACPI● ACPI = Amazingly Complex Piece of Interface● Used for everything from device discovery,
interrupt routing to power management● To start with, mostly interested in devices and
interrupts● Main changes to APIC code were to make it
map properly● Seems well-behaved after that
![Page 36: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/36.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: device mappings● Dom0 kernel has two address spaces:
– Pseudo-physical domain memory– Machine-physical memory
● Must know which is which for any given mapping● Add _PAGE_IOMAP flag to mark hardware ptes
– No pfn->mfn conversion● VM_IO segments mapped with _PAGE_IOMAP● E820 map avoids RAM holes
![Page 37: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/37.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: DMA / SWIOTLB● Make sure devices are talking to the memory
they think they are● Hook DMA operations to
– Convert pfn<->mfn– Make memory machine contiguous
● SWIOTLB deals with a lot of the tricky cases– Involves copying, so should be avoided for high
performance devices
![Page 38: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/38.jpg)
Xen Summit at Oracle Feb 24-25, 2009
*** SUBJECT HERE ***
*** BLURB HERE ***
![Page 39: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/39.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Dom 0: upstream progress● Most core patches posted, out for review● Looks good for next merge window (2.6.30)
– Core support at least– Not necessarily every feature
●
![Page 40: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/40.jpg)
Xen Summit at Oracle Feb 24-25, 2009
DEMO
![Page 41: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/41.jpg)
Xen Summit at Oracle Feb 24-25, 2009
State: Good● Generally very stable● AHCI, PIIX, mpt drive controllers work● E1000, iwlagn networking OK● Intel graphics fully accelerated
– Radeon X server starts OK too● Sound fine● USB good too● Oh, and you can start domains
![Page 42: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/42.jpg)
Xen Summit at Oracle Feb 24-25, 2009
State: Meh● S3 suspend not done● Cpufreq doesn't work● ACPI hotkeys seem dead● Need wider hardware testing for more
confidence● HVM was working, but now not (general xen-
unstable issue?)
![Page 43: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/43.jpg)
Xen Summit at Oracle Feb 24-25, 2009
TODO● Host S3 suspend resume
– Should just be a matter of bringing over patches– Upstreaming could be awkward
● MSI– Hoping its no more complex than APIC
● Pciback● Blktap2● Pvhvm support – started, need more work● Wider hardware testing
![Page 44: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/44.jpg)
Xen Summit at Oracle Feb 24-25, 2009
No Excuses● Now is the time to base development on the
mainline kernel● Core Xen support is stable● Dom0 support is fairly stable● Remaining work is in self-contained chunks
![Page 45: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/45.jpg)
Xen Summit at Oracle Feb 24-25, 2009
The Kittens are Thinking of You...
![Page 46: Xen in Mainline Linux Status UpdateXen Summit at Oracle Feb 24-25, 2009 git migration Migrated upstream Xen work to git Mercurial + patchqueue was getting awkward Git makes is more](https://reader034.vdocuments.mx/reader034/viewer/2022042016/5e748b529b777a4c2546312a/html5/thumbnails/46.jpg)
Xen Summit at Oracle Feb 24-25, 2009
Thanks!
GIT repository:git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
or...1. Go to git.kernel.org2. Look for “xen.git” on the page3. Cut long url4. git clone <paste> linux-xen