more on how ipfw(8) deals with tiny fragments. While we're at it, add
a quick log message to even let people know we dropped a packet. (Note
that the second FINE POINT is somewhat redundant given the first, but
since the code is there, leave the docs for it.)
MFC after: 1 day
loading breakage'). The patch fixes serious issues with the VFS
operations vector array which results in a crash when a filesystem module
adding a new VOP is loaded into the kernel. Basically what was happening
before was that the old operations vector was being freed and a new one
allocated. The original MALLOC code tended to reuse the same address
for the case and so the bug did not rear its ugly head until the new memory
subsystem was emplaced.
This patch replaces the temporary workaround Dave O'Brien comitted in 1.58.
The patch is clean enough that I intend to MFC it to stable at some point.
Submitted by: Alexander Kabaev <ak03@gte.com>
MFC after: 1 week
0xdeadc0de and then check for it just before memory is handed off as part
of a new request. This will catch any post free/pre alloc modification of
memory, as well as introduce errors for anything that tries to dereference
it as a pointer.
This code takes the form of special init, fini, ctor and dtor routines that
are specificly used by malloc. It is in a seperate file because additional
debugging aids will want to live here as well.
only for exceptions.
While adding this to exception_save and exception_restore, it was hard
to find a good place to put the instructions. The code sequence was
sufficiently arbitrarily ordered that the density was low (roughly 67%).
No explicit bundling was used.
Thus, I rewrote the functions to optimize for density (close to 80% now),
and added explicit bundles and nop instructions. The immediate operand
on the nop instruction has been incremented with each instance, to make
debugging a bit easier when looking at recurring patterns. Redundant
stops have been removed as much as possible. Future optimizations can
focus more on performance. A well-placed lfetch can make all the
difference here!
Also, the FRAME_Fxx defines in frame.h were mostly bogus. FRAME_F10 to
FRAME_F15 were copied from FRAME_F9 and still had the same index. We
don't use them yet, so nothing was broken.
the block to read and copy out. This removes the hack in
udf_readatoffset() for only reading one block at a time. WooHoo!
Remove a redundant test for fragmented fids in both udf_readdir()
and udf_lookup(). Add comment to both as to why the test is
written the way it is. Add a few more safety checks for brelse().
Thanks to Timothy Shimmin <tes@boing.melbourne.sgi.com> for pointing
out these problems.
sent me a replacement patch that fixes the problem. The challenge
buffer was not large enough by a factor of 4 (due to my changing the
size from 128 to 32, but not u_int8_t to u_int32_t).
MFC after: 1 day
Submitted by: skibo@pacbell.net
Requested by: bde
Since locking sigio_lock is usually followed by calling pgsigio(),
move the declaration of sigio_lock and the definitions of SIGIO_*() to
sys/signalvar.h.
While I am here, sort include files alphabetically, where possible.
mutex class. Currently this is only used for kmapentzone because kmapents
are are potentially allocated when freeing memory. This is not dangerous
though because no other allocations will be done while holding the
kmapentzone lock.
is limiting it to, not what the device says it can handle.
- cl_status is an integer. cl_lstatus is a pointer.
- Add some debugging code to dump some things the driver knows about
the adapter.
- Tell CAM that the adapter can handle more commands when a command
completes. This fixes the problem were the SIM would freeze once
the driver hit the maximum number of transactions for the device.
- Change the vendor string to COMPAQ.
- Turn of Synchronize Cache for now. It locks the controller up.
Approved by: msmith
Obtained from: Yahoo!
malloc profiling) also modified the set of pre-defined buckets for the
memory allocator. For reasons unknown to me, this resulted in extensive
memory corruption in the kernel, in particular on SMP boxes, so I'm
committing this work-around until Jeff gets a chance to debug it
properly. David Wolfskill pointed me at this commit as the one that
might be a problem; I've been running this code on two dual-processor
burn-in boxes for about 12 hours now, and the rate of panics due to
memory corruption has dropped to zero (from one every five minutes).
Hopefully not treading on the toes of: jeff
