* introduce fsetown(), fgetown(), fownsignal() - this sets/retrieves/signals
the owner of descriptor, according to appropriate sematics
of TIOCSPGRP/FIOSETOWN/SIOCSPGRP/TIOCGPGRP/FIOGETOWN/SIOCGPGRP ioctl; use
these routines instead of custom code where appropriate
* make every place handling TIOCSPGRP/TIOCGPGRP handle also FIOSETOWN/FIOGETOWN
properly, and remove the translation of FIO[SG]OWN to TIOC[SG]PGRP
in sys_ioctl() & sys_fcntl()
* also remove the socket-specific hack in sys_ioctl()/sys_fcntl() and
pass the ioctls down to soo_ioctl() as any other ioctl
change discussed on tech-kern@
during a read(v)/write(v). If that happeded, we either passed a NULL
pointer or a pointer to something uninitialized as iov to ktrace,
or we got a memory leak. In read/write (w/o -v) we zero-initialize
the iov now to limit damage, in the -v calls the (dynamically allocated)
pointer is checked after the I/O.
- prevent BLOCKED upcalls on double page faults and during upcalls
- make libpthread handle blocked threads which hold locks
- prevent UNBLOCKED upcalls from overtaking their BLOCKED upcall
this adds a new syscall sa_unblockyield
see also http://mail-index.netbsd.org/tech-kern/2003/09/15/0020.html
- add simple lock for the list
- make get function remove the item from the list
- eliminate superfluous functions
thanks to enami and matt for the feedback.
the information there.
TODO:
1. since timer stuff gets called from an interrupt context, we could
preallocate ksiginfo_t's from the pool, so we don't need a kmem
pool.
2. probably the sa signal delivery syscall can be changed to take
a ksiginfo_t so we can use only one pool.
3. maybe when we add realtime signal support, add a resource limit
on the number of ksiginfo_t's a process can allocate.
and exit(): we have to lookup the entry in the private copy
again, otherwise the wrong list is manipulated.
should fix a panic on postgres shutdown reported by Marc Recht
being here, improve sone debug messages
shminfo.shmseg, in view of the fact that only few processes utilize a
significant fraction of it:
-turn the table into a linked list, elements allocated from a pool(9)
-On fork(), just bump a refcount instead of copying the list; it will
be decremented on exit() and exec(). Only copy if an attach or detach
takes place in between, which is rarely the case.
into compiled LKMs. Check this information when LKM is loaded into kernel
and refuse LKMs not matching currently running kernel. Provide LMFORCE
ioctl to skip this check for those feeling adventurous.
as discussed on tech-kern@, thanks to feedback from Bill Studenmund and others
every field; some need to stay around.
Fixes a bug where by calling shutdown() on a socket with knotes
will cause the kernel to panic when the kernel closes the socket.
Other access, such as calling kevent() may also trigger the panic.
Debugged with help from Jason and Allen. Patch reviewed by same plus
Itojun and Matt Thomas.
This problem seems to be the same one that FreeBSD saw in their PR
number 54331.
Kernel version _not_ bumped as we will piggyback the bump earlier today.
christos