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Hi all, I need some help with the following problem: I need to migrate a bunch of user accounts to another domain on a Windows 2003 server (eventually to 2008R2, but that step seemed to big to do in one go). To keep all access rights etc. correct, I need to get the SID history set correctly as well. From what I've researched so far, I'm aware of

2014-05-13 15:47-0400, Waiman Long: > On 05/12/2014 11:22 AM, Radim Kr?m?? wrote: > >I think there is an unwanted scenario on virtual machines: > >1) VCPU sets the pending bit and start spinning. > >2) Pending VCPU gets descheduled. > > - we have PLE and lock holder isn't running [1] > > - the hypervisor randomly preempts us > >3) Lock holder

2014-05-13 15:47-0400, Waiman Long: > On 05/12/2014 11:22 AM, Radim Kr?m?? wrote: > >I think there is an unwanted scenario on virtual machines: > >1) VCPU sets the pending bit and start spinning. > >2) Pending VCPU gets descheduled. > > - we have PLE and lock holder isn't running [1] > > - the hypervisor randomly preempts us > >3) Lock holder

From ba9abf6ee7e5fe0515e2d51b14743c8d5416285c Mon Sep 17 00:00:00 2001 From: Liu, Jinsong <jinsong.liu@intel.com> Date: Fri, 24 Feb 2012 02:18:02 +0800 Subject: [PATCH 2/2] Xen pad logic This patch implement Xen pad logic, and when getting pad device notification, it hypercalls to Xen hypervisor for core parking. Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com> ---

...Postfix allow to create pugins (external dynamically loadable libraries) for such task. recent postfix source code already includes such plugins for mysql, ldap etc.. My question is - my be some one has already made such plugin or my be someone is interested to cooperate in such job. [my be Timo itsef?:))] Uldis

...the advantage of one bit is that if we use a whole byte for 1 bit we can avoid some atomic ops. The entire reason for this in-word spinner is to amortize the cost of hitting the external node cacheline. So traditional locks like test-and-test and the ticket lock only ever access the spinlock word itsef, this MCS style queueing lock has a second (and, see my other rants in this thread, when done wrong more than 2) cacheline to touch. That said, all our benchmarking is pretty much for the cache-hot case, so I'm not entirely convinced yet that the one pending bit makes up for it, it does in the...

...om the delay caused by cacheline propagation and really cold cache is hundreds(?) of cycles, so we could burn some to ensure correctness and still be waiting when the first pending CPU unlocks. > So traditional locks like test-and-test and the ticket lock only ever > access the spinlock word itsef, this MCS style queueing lock has a > second (and, see my other rants in this thread, when done wrong more > than 2) cacheline to touch. > > That said, all our benchmarking is pretty much for the cache-hot case, > so I'm not entirely convinced yet that the one pending bit makes...

...om the delay caused by cacheline propagation and really cold cache is hundreds(?) of cycles, so we could burn some to ensure correctness and still be waiting when the first pending CPU unlocks. > So traditional locks like test-and-test and the ticket lock only ever > access the spinlock word itsef, this MCS style queueing lock has a > second (and, see my other rants in this thread, when done wrong more > than 2) cacheline to touch. > > That said, all our benchmarking is pretty much for the cache-hot case, > so I'm not entirely convinced yet that the one pending bit makes...

Hello, I''m hiring a XEN virtual machine running Ubuntu at a hosting company. My XEN virtual machine is hosted on a server which has some other VM''s running on it. They all use ubuntu or debian. After a crash sometime last week, the systemclock of my VM is off by an hour (it says 19:49, although it''s 18:49 here now). The other VM''s don''t have