vnode buffers locked at once. In particular, there are indirect buffers
among locked ones. The bdwrite() may start the flushing to keep dirty
buffer list at the bounds. If any buffer on the dirty list requires
translation from logical to physical block number, code may ends up
trying to lock an indirect buffer already locked in ffs_balloc_ufsX.
Prevent the bdflush() activity when several buffers are locked at once
by setting the TDP_INBDFUSH for the problematic code blocks.
Reported and tested by: pho, Josef Buchsteiner at Juniper
In collaboration with: kan
MFC after: 1 month
when stack realignment is turned on (it is ALWAYS on for main), however
in a profiling build %ecx would be clobbered by mcount(), this would lead
to a segmentation fault when the code tries to reference any argument.
This fix changes mcount() to preserve %ecx.
PR: bin/119709
Reviewed by: bde
MFC after: 1 week
return NDIS_STATUS_PENDING. In this case, it's waiting for 5 secs to
get the response from drivers now. However, some NDIS drivers can send
the response before NDIS framework gets ready to receive it so we might
always be blocked for 5 secs in current implementation. NDIS framework
should reset the event before calling NDIS driver's callback not after.
MFC after: 1 month
used but MSI to HyperTransport IRQ mapping is enabled, and would act as
if MSI is turned on, resulting in interrupt loss.
This commit will,
1. enable MSI mapping on a device only when MSI is enabled for that
device and the MSI address matches the HT mapping window.
2. enable MSI mapping on a bridge only when a downstream device is
allocated an MSI address in the mapping window
PR: kern/118842
Reviewed by: jhb
MFC after: 1 week
child process immediately after bulk bcopy() without dropping the
process lock.
Since process is not single-threaded when forking, dropping and
reacquiring the lock allows an other thread to change the process title
of the parent in between, and results in hold being done on the invalid
pointer. The problem manifested itself as the double free of the old
p_args.
Reported by: kris
Reviewed by: jhb
MFC after: 1 week
The kernel has a special wchan called `lbolt', which is triggered each
second. It doesn't seem to be used a lot and it seems pretty redundant,
because we can specify a timeout value to the *sleep() routines. In an
attempt to eventually remove lbolt, make the NFS/RPC code use a timeout
of `hz' when trying to reconnect.
Only the TTY code (not MPSAFE TTY) and the VFS syncer seem to use lbolt
now.
Reviewed by: attilio, jhb
Approved by: philip (mentor), alfred, dfr
1) Unindent and sort variables.
2) Indent struct members.
3) Remove _packed, use guaranteed >128 bytes size and only first 128
bytes from the structure.
4) Reword comment.
Obtained from: bde
- removing 'const' qualifier from an input parameter to conform to the type
required by rw_assert();
- using in_addr->s_addr to retrive 32 bits address value.
Observed by: tinderbox
and there is no need to maintain it.
- Fix vn_get() in order to let it call vget(9) with a valid locking
request. vget(9) returns the vnode locked in order to prevent recycling,
but in this case internal XFS locks alredy prevent it from happening, so
it is safe to drop the vnode lock before to return by vn_get().
- Add a VNASSERT() in vget(9) in order to catch malformed locking requests.
Discussed with: kan, kib
Tested by: Lothar Braun <lothar at lobraun dot de>
