Re: [PATCH v2 1/5] virtio: add functions for piecewise addition of buffers

2013-01-03 Thread Wanlong Gao
On 01/02/2013 01:03 PM, Rusty Russell wrote: Paolo Bonzini pbonz...@redhat.com writes: The virtqueue_add_buf function has two limitations: 1) it requires the caller to provide all the buffers in a single call; 2) it does not support chained scatterlists: the buffers must be provided as an

Re: [Xen-devel] [PATCH v3 00/11] xen: Initial kexec/kdump implementation

2013-01-03 Thread Jan Beulich
On 02.01.13 at 12:26, Andrew Cooper andrew.coop...@citrix.com wrote: On 27/12/12 18:02, Eric W. Biederman wrote: It probably make sense to split them apart a little even. Thinking about this split, there might be a way to simply it even more. /sbin/kexec can load the Xen crash kernel

Re: [PATCH v3 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE

2013-01-03 Thread Jan Beulich
On 27.12.12 at 03:18, Daniel Kiper daniel.ki...@oracle.com wrote: Some implementations (e.g. Xen PVOPS) could not use part of identity page table to construct transition page table. It means that they require separate PUDs, PMDs and PTEs for virtual and physical (identity) mapping. To

Re: [PATCH] virtio_console: correct error message on failure of debugfs_create_dir

2013-01-03 Thread Arnd Bergmann
On Friday 21 December 2012, Amit Shah wrote: On (Thu) 20 Dec 2012 [14:11:21], Sasha Levin wrote: debugfs_create_dir() returns NULL if it fails, there's little point in calling PTR_ERR on it. debugfs_create_dir() does return an error value if debugfs is not enabled. This check for

Re: [RFC PATCH] virtio-net: reset virtqueue affinity when doing cpu hotplug

2013-01-03 Thread Eric Dumazet
On Wed, 2012-12-26 at 15:06 +0800, Wanlong Gao wrote: Add a cpu notifier to virtio-net, so that we can reset the virtqueue affinity if the cpu hotplug happens. It improve the performance through enabling or disabling the virtqueue affinity after doing cpu hotplug. Cc: Rusty Russell

Re: [PATCH v3 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE

2013-01-03 Thread Borislav Petkov
On Thu, Dec 27, 2012 at 03:19:24PM -0800, Daniel Kiper wrote: Hmm... this code is being redone at the moment... this might conflict. Is this available somewhere? May I have a look at it? http://marc.info/?l=linux-kernelm=135581534620383 The for-x86-boot-v7 and -v8 branches. HTH. --