relookup() in union_relookup() is succeeded. However, if relookup()
returns non-zero value, that is relookup fails, VOP_MKDIR is never
called (c.f. union_mkshadow). Thus, pathname buffer is never FREEed.
Reviewed by: phk
Submitted by: kato
PR: 3262
allow large systems to boot successfully with bounce buffers compiled
in. We are now limiting bounce space to 512K. The 8MB allocated for
a 512MB system is very bogus -- and that is now fixed.
the pv entries. This problem has become obvious due to the increase
in the size of the pv entries. We need to create a more intelligent
policy for pv entry management eventually.
Submitted by: David Greenman <dg@freebsd.org>
cache queue more often. The pageout daemon had to be waken up
more often than necessary since pages were not put on the
cache queue, when they should have been.
Submitted by: David Greenman <dg@freebsd.org>
fork. (On my machine, fork is about 240usecs, vfork is 78usecs.)
Implement rfork(!RFPROC !RFMEM), which allows a thread to divorce its memory
from the other threads of a group.
Implement rfork(!RFPROC RFCFDG), which closes all file descriptors, eliminating
possible existing shares with other threads/processes.
Implement rfork(!RFPROC RFFDG), which divorces the file descriptors for a
thread from the rest of the group.
Fix the case where a thread does an exec. It is almost nonsense for a thread
to modify the other threads address space by an exec, so we
now automatically divorce the address space before modifying it.
which mistakenly got committed.
Fix two bugs in the ahc_reset_device code:
Limit search for SCBs to process to those that are active and
are not queued for done processing.
It's okay for an SCB to not have a waiting next SCB.
Be consistant about testing for parity errors after waiting for a
REQ on the bus.
Don't ack the last byte in a transaction until after we've cleared
all target state.
aic7xxx_asm.c:
Test the return value of getopt against -1 not EOF. (Yet another
shameless victum of the style guide being wrong).
<dirent.h> should be used instead to a warning. If this causes too
many warnings in ports then it should be changed back after checking
some ports for related configuration errors.
Moved the definition of DIRSIZ() from <sys/dir.h> to <sys/dirent.h>
so that it can be used in the kernel without including <sys/dir.h>.
Renamed it in some cases to avoid new namespace pollution.
resetting the keyboard.
Well, sorry, this bug is totally my fault. I DID intend to preserve
them, but somehow I failed.
The bug puts some old keyboard controllers in a strange state,
resulting in keyboard freeze or random key input.
The fix closes PR kern/3067.
that nameless pipes are not implemented as sockets.
Don't include <sys/time.h> if KERNEL is defined. It should already have
been included by including <sys/param.h>. Fixed a nearby typo.
longer has anything to do with vnodes and never had anything to do
with buffers, but it needs the definitions of B_READ and B_WRITE
for use with the bogus useracc() interface and was getting them
bogusly due to excessive cleanups in rev.1.49.
driver is waiting a bus settle delay. There should really be a facility
for the controller driver to "freeze" its queue during recovery operations
which would make all of this gymnastics unnecessary.
nothing else will lower it until either much later, or never(?) for
kernel processes.
This basically re-fixes what Bruce fixed in rev 1.29 of kern_fork.c,
which was broken again now the child does not execute back up the fork()
calling tree.
Rename the PT* index KSTK* #defines to UMAX*, since we don't have a kernel
stack there any more..
These are used to calculate VM_MAXUSER_ADDRESS and USRSTACK, and really
do not want to be changed with UPAGES since BSD/OS 2.x binary compatability
depends on it.
space. (!)
Have each process use the kernel stack and pcb in the kvm space. Since
the stacks are at a different address, we cannot copy the stack at fork()
and allow the child to return up through the function call tree to return
to user mode - create a new execution context and have the new process
begin executing from cpu_switch() and go to user mode directly.
In theory this should speed up fork a bit.
Context switch the tss_esp0 pointer in the common tss. This is a lot
simpler since than swithching the gdt[GPROC0_SEL].sd.sd_base pointer
to each process's tss since the esp0 pointer is a 32 bit pointer, and the
sd_base setting is split into three different bit sections at non-aligned
boundaries and requires a lot of twiddling to reset.
The 8K of memory at the top of the process space is now empty, and unmapped
(and unmappable, it's higher than VM_MAXUSER_ADDRESS).
Simplity the pmap code to manage process contexts, we no longer have to
double map the UPAGES, this simplifies and should measuably speed up fork().
The following parts came from John Dyson:
Set PG_G on the UPAGES that are now in kernel context, and invalidate
them when swapping them out.
Move the upages object (upobj) from the vmspace to the proc structure.
Now that the UPAGES (pcb and kernel stack) are out of user space, make
rfork(..RFMEM..) do what was intended by sharing the vmspace
entirely via reference counting rather than simply inheriting the mappings.
convenient and makes life difficult for my next commit. We still need
an i386tss to point to for the tss slot in the gdt, so we use a common
tss shared between all processes.
Note that this is going to break debugging until this series of commits
is finished. core dumps will change again too. :-( we really need
a more modern core dump format that doesn't depend on the pcb/upages.
This change makes VM86 mode harder, but the following commits will remove
a lot of constraints for the VM86 system, including the possibility of
extending the pcb for an IO port map etc.
Obtained from: bde
The typo was detected once apon a time with the -Wunused compile option.
The result was that a block of code for implementing
madvise(.. MADV_SEQUENTIAL..) behavior was "dead" and unused, probably
negating the effect of activating the option.
Reviewed by: dyson
struct direct, not using UFS' definition of DIRBLKSIZ, using directory
seek cookies to make reading non-UFS directories reliable
(e.g. cd9660, ext2fs).
A special thanks to Robert Eckardt for providing an ISC binary of GNU
ls so that I could test these changes.
