Re: Chasing down bugs with access(2)

2010-08-02 Thread Jaakko Heinonen
On 2010-07-21, Bruce Evans wrote: > > See PR kern/125009 (http://www.freebsd.org/cgi/query-pr.cgi?pr=125009). > > I looked at the patches in the PR. It seems reasonable to require an X > but for VEXEC for all file types except directories, like I think the > vaccess() version of your patch does.

Re: nanosleep - does it make sense with tv_sec < 0?

2010-08-02 Thread Garrett Cooper
On Wed, Jul 28, 2010 at 11:01 PM, Garrett Cooper wrote: > Hi Hackers, >    I ran into an oddity with the POSIX spec that seems a bit unrealistic: > > [EINVAL] >    The rqtp argument specified a nanosecond value less than zero or > greater than or equal to 1000 million. > >    Seems like it should

Re: freebsd exokernel

2010-08-02 Thread Fabio Kaminski
Ali, thanks for pointing Corey, in fact im already studying its source ... this core aware architecture , and share nothing mechanisms are just brilliant, each core running its own tcp stack, while it has one core exclusive for the device pooling its great... is jails working that way? Ow, err

Puzzling performance

2010-08-02 Thread Guy Helmer
On a FreeBSD 7.1 SCHED_ULE kernel, I have a large number of files opened and mmapped (with MAP_NOSYNC option) for shared-memory communication between processes. Normally, memcpy() copies data into these shared-memory buffers in a reasonable amount of time closely related to the size of the copy (r