Re: [LIP] NPTL behaviour differences

Arun Sharma wrote:

> On Wed, Mar 03, 2004 at 10:27:17PM +0530, Shantanu Kumar wrote:
> 
>>Hi,
>>
>>Has anybody tried out using NPTL on 2.6 or the patched 2.4 branch that
>>came with RH9 onwards? I was wondering what are the behaviour
>>differences compared to the "straight" kernel. And whether there's any
>>change in API? I heard it breaks some apps.
>>
>>Most importantly, what are the caveats or the important points to keep
>>in mind while coding with NPTL? Links will be appreciated.
> 
> 
> - Signal handling (you can send signals to a whole process now)

I believe signals can be per thread now. Earlier it was to the entire process.

> - All threads in a process get the same return value for getpid()

Additionally there are futexes now. It is not a behavioural difference though.

Not to mention O(1) proc cleanups which is a big thing..

  Shridhar



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