cvs commit: src/sys/kern kern_prot.c src/sys/i386/linux
sobomax at FreeBSD.org
Thu Mar 3 08:57:55 PST 2005
sobomax 2005-03-03 16:57:55 UTC
FreeBSD src repository
In linux emulation layer try to detect attempt to use linux_clone() to
create kernel threads and call rfork(2) with RFTHREAD flag set in this case,
which puts parent and child into the same threading group. As a result
all threads that belong to the same program end up in the same threading
This is similar to what linuxthreads port does, though in this case we don't
have a luxury of having access to the source code and there is no definite
way to differentiate linux_clone() called for threading purposes from other
uses, so that we have to resort to heuristics.
Allow SIGTHR to be delivered between all processes in the same threading
group previously it has been blocked for s[ug]id processes.
This also should improve locking of the same file descriptor from different
threads in programs running under linux compat layer.
Reported by: Andriy Gapon <avg at icyb.net.ua>
Idea suggested by: rwatson
Revision Changes Path
1.48 +19 -0 src/sys/i386/linux/linux_machdep.c
1.196 +12 -0 src/sys/kern/kern_prot.c
More information about the cvs-all