I am tying to apply the Preemptive Scheduling patch to BK 2.4.19 final from the LinuxPPC tree. I used the patch labeled *2.4.19-2* but it did not apply cleanly. Did I use the correct patch version? This is also the reason from my previous inquiry about dash kernel revisions. My assumption is that it would have worked if I had a 2.4.19-2 BK label. However there aren't dashed final versions in the repository. TIA Robert Love wrote: > > On Thu, 2002-12-12 at 04:42, Guennadi Liakhovetski wrote: > > > I've searched to no avail the internet to clarify one question: > > my current understanding is, that was used to be the low-latency patch > > by Andrew Morton is now included (a modified version thereof) in 2.5, as > > well as the preemptible kernel patch by Robert Love (credits to Ingo > > Molnar and others are due too)? The preemptibility is enabled by a > > configuration option, but what about the low- (scheduler-) latency? Is it > > just always on, or are they enabled / disabled together or what? > > Hi. You are confusing a few things, I think. > > The preemptive kernel was merged and is enabled via CONFIG_PREEMPT. > This is the basis for low latency in 2.5. > > A new scheduler, commonly called the O(1) scheduler, was merged. > > Finally, the low latency patch was not merged. Instead, much work went > in to tuning up parts of the VM and VFS that were slow and > unpreemptive. A couple "low latency"-style lock breaking did go into > 2.5 just recently, however, in areas where the latency problems could > not be be solved via the cleaner algorithmic rewrite. > > All in all 2.5 is very nice. > > Robert Love > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: <a href="http://mail.directvinternet.com/jump/http://mail.nl.linux.org/kernelnewbies";>http://mail.nl.linux.org/kernelnewbies</a>/ > FAQ: <a href="http://mail.directvinternet.com/jump/http://kernelnewbies.org/faq";>http://kernelnewbies.org/faq</a>/ ------------------------------------------------------------ Allen Curtis | All good things come to those Ones and Zeros, Inc. | who wait. Some of us have to mailto:acurtis@onz.com | wait a little longer. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
