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3e470d1fdd
freebsd-skq/sys
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jhb 3e470d1fdd Various fixups to locking: 
- Remove a lot of superfluous locking during attach.  There is no need
  to lock access to the driver until some other thread has a way of getting
  to it.  For ethernet drivers the other ways include registering an
  interrupt handler via bus_setup_intr(), calling ether_ifattach() to hook
  into the network stack, and kicking off a callout-driven timer via
  callout_reset().
- Use callout_* rather than timeout/untimeout.
- Break out of xl_rxeof() if IFF_DRV_RUNNING is clear after ifp->if_input
  returns to handle the case where the interface was stopped while we were
  passing a packet up the stack.  Don't call xl_rxeof() in xl_rxeof_task()
  unless IFF_DRV_RUNNING is set.  With these fixes in place, any
  outstanding task will gracefully terminate as soon as it gets a chance to
  run after the interface has been stopped via xl_stop().  As a result,
  taskqueue_drain() is no longer required in xl_stop().  The task is still
  drained in detach() however to make sure that detach() can safely destroy
  the driver mutex at the end of the function.
- Lock the driver lock in the ifmedia callouts and don't lock across
  ifmedia_ioctl() in xl_ioctl().

Note: glebius came up with most of (3) as well independently.  I took a
rather roundabout way of arriving at the same conclusion.

MFC after:	3 days
2005-08-18 19:24:30 +00:00
..
alpha Add hints for uart(4). These are the same as for sio(4) and make it 2005-08-06 19:24:22 +00:00
amd64 Add aliases for atomic operations on 64-bit integers just like other 2005-08-18 14:36:47 +00:00
arm - Add support for saving stack traces and displaying them via printf(9) 2005-08-03 04:27:40 +00:00
boot Add a "comconsole_speed" loader variable that can be used to change 2005-08-18 01:39:43 +00:00
bsm For consistency with more system include files, add a trailing '_' to 2005-05-29 16:11:34 +00:00
cam Merge the dev_clone and dev_clone_cred event handlers into a single 2005-08-08 19:55:32 +00:00
coda Merge the dev_clone and dev_clone_cred event handlers into a single 2005-08-08 19:55:32 +00:00
compat Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and 2005-08-09 10:20:02 +00:00
conf Add VIA/ACE "PadLock" support as a crypto(9) driver. 2005-08-18 00:30:22 +00:00
contrib Wrap the new world order in __FreeBSD__ to ease future imports. 2005-08-09 11:59:02 +00:00
crypto Add VIA/ACE "PadLock" support as a crypto(9) driver. 2005-08-18 00:30:22 +00:00
ddb Remove the need to forward declare statics by moving them around. 2005-08-10 07:08:14 +00:00
dev Fixup locking and mark MPSAFE: 2005-08-18 19:10:07 +00:00
doc
fs Handle device drivers with D_NEEDGIANT in a way which does not 2005-08-17 08:19:52 +00:00
gdb check return value of gdb_rx_varhex 2005-03-28 18:31:18 +00:00
geom Always run dedicated kernel thread (even when we have hardware support). 2005-08-17 15:25:57 +00:00
gnu Repair this: 2005-07-09 18:30:31 +00:00
i4b Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and 2005-08-09 10:20:02 +00:00
i386 Rename variables: 2005-08-18 00:28:25 +00:00
ia64 Remove the execute permission for stacks. 2005-08-14 23:17:59 +00:00
isa Add pnp and location info for the ISA bus. The pnp info is the 2005-08-01 07:03:10 +00:00
isofs/cd9660 - restore the ability to mount cd9660 filesystems as root by inverting 2005-08-14 04:19:36 +00:00
kern - don't forget to save freqency when priority is raised. 2005-08-18 16:41:25 +00:00
libkern Ha! This is a very interesting bug. 2005-08-08 19:38:00 +00:00
modules Define the target for opt_compat.h only if KERNBUILDDIR 2005-08-18 14:50:08 +00:00
net When we started calling if_findindex() from if_alloc() with an empty 2005-08-18 18:36:40 +00:00
net80211 revert 1.64: we cannot use the channel characteristics to decide when to 2005-08-13 17:50:21 +00:00
netatalk Eliminate MAC entry point mac_create_mbuf_from_mbuf(), which is 2005-07-05 23:39:51 +00:00
netatm Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and 2005-08-09 10:20:02 +00:00
netgraph Use the ISO standard function variable vs. a GCC'ism. 2005-08-10 06:25:41 +00:00
netinet In order to support CARP interfaces kernel was taught to handle more 2005-08-18 10:34:30 +00:00
netinet6 added a missing unlock (just do the same thing as in netinet/raw_ip.c) 2005-08-18 11:11:27 +00:00
netipsec Correct typo in a comment describing vshiftl(). 2005-06-02 23:56:10 +00:00
netipx Stop embedding struct ifnet at the top of driver softcs. Instead the 2005-06-10 16:49:24 +00:00
netkey fix build without option INET6. 2005-07-30 20:10:31 +00:00
netnatm Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and 2005-08-09 10:20:02 +00:00
netncp Change API of mb_copy_t in libmchain so that netsmb can handle 2005-07-29 13:22:37 +00:00
netsmb Merge the dev_clone and dev_clone_cred event handlers into a single 2005-08-08 19:55:32 +00:00
nfs Fixes for NFS crashes on architectures that require strict alignment. 2005-07-14 20:08:27 +00:00
nfs4client - We want if (mrep != NULL) not if (m_freem != NULL). m_freem will never 2005-04-25 05:11:19 +00:00
nfsclient FIx for a bug in the change that made nfs_timer() MPSAFE. We need to 2005-07-27 15:06:26 +00:00
nfsserver NFS write gathering defers execution of NFS server write requests to wait 2005-04-17 16:25:36 +00:00
opencrypto Fix bogus check. It was possible to panic the kernel by giving 0 length. 2005-08-18 11:58:03 +00:00
pc98 MFi386: revision 1.1204. 2005-07-21 11:13:12 +00:00
pccard Change a directory layout for pc98. 2005-05-10 12:02:18 +00:00
pci Various fixups to locking: 2005-08-18 19:24:30 +00:00
posix4 Introduce MAC Framework and MAC Policy entry points to label and control 2005-05-04 10:39:15 +00:00
powerpc Remove unnecessary and alarming printf. 2005-08-16 02:38:02 +00:00
rpc - Don't call rpcclnt_realign() if we don't have any mbufs to realign. 2005-03-19 01:16:25 +00:00
security Insert a series of place-holder function pointers in mac_policy.h for 2005-08-08 16:09:33 +00:00
sparc64 Now that at least some screen savers work on sparc64 sync with other 2005-08-15 21:15:07 +00:00
sys Handle device drivers with D_NEEDGIANT in a way which does not 2005-08-17 08:19:52 +00:00
tools Allow EVFILT_VNODE events to work on every filesystem type, not just 2005-06-09 20:20:31 +00:00
ufs In the ufsdirhash_build() failure case for corrupted directories 2005-08-17 08:48:42 +00:00
vm Do not use vm_pager_init() to initialize vnode_pbuf_freecnt variable. 2005-08-13 20:21:33 +00:00
Makefile When building cscopnamefile, default architecture to ${MACHINE}, not i386. 2005-03-08 00:09:41 +00:00