Xen project Mailing List

[Xen-devel] Features and bug-fixes that went in Linux 3.2

To: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx

From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

Date: Mon, 9 Jan 2012 16:30:39 -0500

Delivery-date: Mon, 09 Jan 2012 21:33:09 +0000

List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Linux 3.2 was released on Jan 4th and this release saw a lot of interesting work. For the full credit list, please see the bottom of the email. We did not have any new drivers in this release, but we did have some awesome goodness: - Remove the XEN_PLATFORM_PCI config option. We need it 99% of time and not having it enabled caused tons of headaches. Squashing it in fixed a lot of distro bugs were the xen-platform-pci.ko module was not present in the installer. - Rework the E820 parser. It also for proper accounting of memory in the "low" (so below 4GB) and "high" (>4GB) memory that can be used for ballooning. In other words, what you see in 'xm list' vs 'xl list' is more truthfull. - Support "big-iron" machines with PCI segments (another layer in case you run out of PCI buses, so more than 256 devices). - PVonHVM kexec support. It all worked until we found out that under Amazon EC2 (and Xen 3.4.x) it would lock up the guest so had to revert the new functionality . Will revisit this for 3.4 with a 'feature-XX' flag. - MMU improvements by not using the 'vmalloc_sync_all' slow call but being more selective. - Initial work to make HVM domains be capable of being device drivers or even host the XenBus daemon. - Initial work laid out for netback page-flipping (also called zero-copying). - Block can pass in discard (TRIM/UNMAP) requests to the backends. - Block can support the old-style 'feature-barrier' that was removed in 2.6.36 kernels. - Tons of cleanup to make the code easier to read. - Security fixes in the gnt/gnt_alloc ioctl calls. - Work with more than 32 VCPUs. - Tons of bug-fixes in various layers. The most critical were back-ported to the stable kernels. Dan Carpenter (4): xen/pciback: double lock typo xen-gntdev: integer overflow in gntdev_alloc_map() xen-gntalloc: integer overflow in gntalloc_ioctl_alloc() xen-gntalloc: signedness bug in add_grefs() Dan Magenheimer (1): xen: Fix selfballooning and ensure it doesn't go too far Daniel De Graaf (5): xenbus: Fix loopback event channel assuming domain 0 xenbus: don't rely on xen_initial_domain to detect local xenstore xen/gntdev: Fix sleep-inside-spinlock xen: Remove hanging references to CONFIG_XEN_PLATFORM_PCI xen/balloon: Avoid OOM when requesting highmem David Vrabel (9): xen/balloon: account for pages released during memory setup xen/balloon: simplify test for the end of usable RAM xen: allow balloon driver to use more than one memory region xen: allow extra memory to be in multiple regions xen: release all pages within 1-1 p2m mappings xen: use generic functions instead of xen_{alloc, free}_vm_area() block: xen-blkback: use API provided by xenbus module to map rings net: xen-netback: use API provided by xenbus module to map rings xen: map foreign pages for shared rings by updating the PTEs directly Ian Campbell (12): atm: convert to SKB paged frag API. IB: amso1100: convert to SKB paged frag API. IB: nes: convert to SKB paged frag API. IPoIB: convert to SKB paged frag API. tg3: convert to SKB paged frag API. bnx2: convert to SKB paged frag API. bnx2x: convert to SKB paged frag API. bnx2fc: convert to SKB paged frag API. fcoe: convert to SKB paged frag API. xen: netfront: convert to SKB paged frag API. genirq: Add IRQF_RESUME_EARLY and resume such IRQs earlier xen: only limit memory map to maximum reservation for domain 0. Jan Beulich (5): xen/pci: make bus notifier handler return sane values xen/pciback: use mutex rather than spinlock in passthrough backend xen/pciback: miscellaneous adjustments xen/pci: support multi-segment systems xen-blkback: use kzalloc() in favor of kmalloc()+memset() Jeremy Fitzhardinge (1): stop_machine: make stop_machine safe and efficient to call early Joe Jin (1): xen-blkback: fixed indentation and comments Konrad Rzeszutek Wilk (30): Revert "xen/debug: WARN_ON when identity PFN has no _PAGE_IOMAP flag set." xen-pcifront: Update warning comment to use 'e820_host' option. xen-swiotlb: Retry up three times to allocate Xen-SWIOTLB xen-swiotlb: Fix wrong panic. xen-swiotlb: When doing coherent alloc/dealloc check before swizzling the MFNs. xen/pciback: Use mutexes when working with Xenbus state transitions. xen/pciback: use mutex rather than spinlock in vpci backend xen/p2m: Make debug/xen/mmu/p2m visible again. xen/p2m: Use SetPagePrivate and its friends for M2P overrides. xen/pv-on-hvm:kexec: Fix implicit declaration of function 'xen_hvm_domain' xen/pciback: Add flag indicating device has been assigned by Xen xen-blkfront: If no barrier or flush is supported, use invalid operation. xen/blkback: Support 'feature-barrier' aka old-style BARRIER requests. xen/blkback: Report VBD_WSECT (wr_sect) properly. xen/blkback: Fix the inhibition to map pages when discarding sector ranges. xen/blkback: Check for proper operation. xen/blkback: Fix two races in the handling of barrier requests. xen/pciback: Do not dereference psdev during printk when it is NULL. xen/pciback: Check if the device is found instead of blindly assuming so. xen/events: BUG() when we can't allocate our event->irq array. xen/events: Don't check the info for NULL as it is already done. xen/irq: If we fail during msi_capability_init return proper error code. xen/xenbus: Remove the unnecessary check. xen/enlighten: Fix compile warnings and set cx to known value. xen/p2m/debugfs: Fix potential pointer exception. xen/p2m/debugfs: Make type_name more obvious. xen/pm_idle: Make pm_idle be default_idle under Xen. x86/paravirt: PTE updates in k(un)map_atomic need to be synchronous, regardless of lazy_mmu mode xen/swiotlb: Use page alignment for early buffer allocation. Revert "xen/pv-on-hvm kexec: add xs_reset_watches to shutdown watches from old kernel" Laszlo Ersek (1): xen-blkfront: plug device number leak in xlblk_init() error path Li Dongyang (4): xen-blkfront: add BLKIF_OP_DISCARD and discard request struct xen-blkback: Implement discard requests ('feature-discard') xen-blkfront: Handle discard requests. xen-blkfront: fix a deadlock while handling discard response Linus Torvalds (2): Revert "hvc_console: display printk messages on console." Revert "rtc: Expire alarms after the time is set." Olaf Hering (6): xen: use static initializers in xen-balloon.c xen/pv-on-hvm kexec: prevent crash in xenwatch_thread() when stale watch events arrive xen/pv-on-hvm kexec: rebind virqs to existing eventchannel ports xen/pv-on-hvm kexec+kdump: reset PV devices in kexec or crash kernel xen/pv-on-hvm kexec: update xs_wire.h:xsd_sockmsg_type from xen-unstable xen/pv-on-hvm kexec: add xs_reset_watches to shutdown watches from old kernel Randy Dunlap (1): xen-swiotlb: fix printk and panic args Ruslan Pisarev (6): Xen: fix whitespaces,tabs coding style issue in drivers/xen/balloon.c Xen: fix whitespaces,tabs coding style issue in drivers/xen/events.c Xen: fix braces coding style issue in gntdev.c and grant-table.c Xen: fix whitespaces,tabs coding style issue in drivers/xen/pci.c Xen: fix braces coding style issue in xenbus_probe.h Xen: fix braces and tabs coding style issue in xenbus_probe.c Stefano Stabellini (4): xen: add an "highmem" parameter to alloc_xenballooned_pages xen: modify kernel mappings corresponding to granted pages xen: XEN_PVHVM depends on PCI xen: remove XEN_PLATFORM_PCI config option Thomas Meyer (1): xen/pciback: use resource_size() Yu Ke (1): xen/acpi: Domain0 acpi parser related platform hypercall Zhenzhong Duan (1): xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel

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