This is the mail archive of the systemtap@sourceware.org mailing list for the systemtap project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [PATCH v2 2.6.38-rc8-tip 4/20] 4: uprobes: Adding and remove a uprobe in a rb tree.


On Tue, 2011-03-15 at 20:22 +0100, Thomas Gleixner wrote:
> I am not sure if its a good idea to walk the tree
> > as and when the tree is changing either because of a insertion or
> > deletion of a probe.
> 
> I know that you cannot walk the tree lockless except you would use
> some rcu based container for your probes. 

You can in fact combine a seqlock, rb-trees and RCU to do lockless
walks.

  https://lkml.org/lkml/2010/10/20/160

and

  https://lkml.org/lkml/2010/10/20/437

But doing that would be an optimization best done once we get all this
working nicely.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]