Advantages in Scalability of Softriqs versus Tasklets

2014-11-19 Thread Nick Krause
I am curious about reading through LKD, when to start using softriqs other tasklets in terms of when the limit of scalability of tasklets are hit. I am assuming after reading LKD it seems to happen when multiple cores would be of great advantage in scaling the bottom half of my or our people's

Re: skb headroom and tailroom

2014-11-19 Thread Valdis . Kletnieks
On Wed, 19 Nov 2014 09:43:54 +0530, Varun Sharma said: 1. At time of skb allocation sk-sk_prot-max_header value is 272 . If we add tcp header+ip header+mac header outcome will always less than 272 .Then why allocate more ? Is it for future case ? Did you remember to do the calculation for

Why each time of kernel compilation must be done completely?

2014-11-19 Thread 秦弋戈
Hi, This problem has puzzled me for a long time. A normal C make file could parse the reliance and just regenerate the modified source file. But each time when I modified the kernel and recompile it, it does a complete compilation, no matter whether make mrproper is used or not. It's quite

Re: Why each time of kernel compilation must be done completely?

2014-11-19 Thread Greg KH
On Thu, Nov 20, 2014 at 10:05:04AM +0800, 秦弋戈 wrote: Hi, This problem has puzzled me for a long time. A normal C make file could parse the reliance and just regenerate the modified source file. But each time when I modified the kernel and recompile it, it does a complete compilation, no

Re: Why each time of kernel compilation must be done completely?

2014-11-19 Thread Valdis . Kletnieks
On Wed, 19 Nov 2014 18:43:26 -0800, Greg KH said: I think you are doing something wrong, unless you are changing a configuration option, version of gcc, or are changing a .h file that all files include. Actually, that reminds me of a patch I probably need to polish up and make git bisect a