Re: Features and bug fixes for Linux kernel 3.2.

[Igor Mammedov <imammedo@redhat.com>]

On 10/13/2011 09:09 PM, Konrad Rzeszutek Wilk wrote:
> Hey,
>
> Please keep in mind that there is some outstanding work going on which
> could make it in 3.2 depending on when the merge window opens. I will
> enumerate those in the next email.
>
> Anyhow, for 3.2 Linux kernel we have these items loaded and ready to go:
>
>   - A new mechanism to parse the E820 resulting in better ballooning.
>   - hwclock support. Meaning you can do 'date XX' and it will be saved by machine.
>   - Support for PCI multi-segmented machines (big big iron boxes)
>   - Optimizations in DMA API.
>   - "feature-barrier" in the xen-blkback so that older kernels (SLES10)
>     can issue those.
>   - "feature-discard" so that TRIM/SCSI UNMAP operations can be utilized.
>   - kexec/kdump support for PVonHVM.
>   - Cleanups in the code (mostly scripts/cleanpatch.pl)
>   - Static analyzer (smatch) run results fixing bugs.
>   - Tons of bug fixes.
>
> If you think I missed something - please please email me immediately.
>
>
> The list is as follow.
>
> Dan Carpenter (1):
>        xen/pciback: double lock typo
>
> 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
>
> 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 (2):
>        xen: add dom0_op hypercall
>        xen/dom0: set wallclock time in Xen
>
> Joe Jin (1):
>        xen-blkback: fixed indentation and comments
>
> Konrad Rzeszutek Wilk (24):
>        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.
>        x86/paravirt: Partially revert "remove lazy mode in interrupts"

Have You meant ^^^ "x86/paravirt: PTE updates in k(un)map_atomic need to be synchronous, regardless of lazy_mmu mode" there?

>        xen/pv-on-hvm:kexec: Fix implicit declaration of function 'xen_hvm_domain'
>        xen/pciback: Do not dereference psdev during printk when it is NULL.
>        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/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.
>
> 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
>
> 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
>
>
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-- 
Thanks,
  Igor