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opnsense-src/sys
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Robert Watson 84d2b7df26 Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 
as they both interact with the tty code (!MPSAFE) and may sleep if the
tty buffer is full (per comment).

Modify all consumers of uprintf() and tprintf() to hold Giant around
calls into these functions.  In most cases, this means adding an
acquisition of Giant immediately around the function.  In some cases
(nfs_timer()), it means acquiring Giant higher up in the callout.

With these changes, UFS no longer panics on SMP when either blocks are
exhausted or inodes are exhausted under load due to races in the tty
code when running without Giant.

NB: Some reduction in calls to uprintf() in the svr4 code is probably
desirable.

NB: In the case of nfs_timer(), calling uprintf() while holding a mutex,
or even in a callout at all, is a bad idea, and will generate warnings
and potential upset.  This needs to be fixed, but was a problem before
this change.

NB: uprintf()/tprintf() sleeping is generally a bad ideas, as is having
non-MPSAFE tty code.

MFC after:	1 week
2005-09-19 16:51:43 +00:00
..
alpha Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +00:00
amd64 Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +00:00
arm Move the prototypes of db_md_set_watchpoint(), db_md_clr_watchpoint() 2005-09-10 03:01:25 +00:00
boot Remove EPSON PC-386 note A/W/AE/WR support. 2005-09-14 12:39:06 +00:00
bsm For consistency with more system include files, add a trailing '_' to 2005-05-29 16:11:34 +00:00
cam Make the exploring of all luns supported by an HBA more of a 2005-09-16 01:26:17 +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 Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +00:00
conf Fix genassym.o dependencies. 2005-09-19 15:13:33 +00:00
contrib Fix "struct ifnet" leak if attach() fails in the middle. 2005-09-16 12:49:06 +00:00
crypto Add VIA/ACE "PadLock" support as a crypto(9) driver. 2005-08-18 00:30:22 +00:00
ddb Move the prototypes of db_md_set_watchpoint(), db_md_clr_watchpoint() 2005-09-10 03:01:25 +00:00
dev It's safe to wait for command completion in iwi_config(). 2005-09-19 16:26:52 +00:00
doc Experimental support for using doxygen to generate kernel documentation. 2004-07-11 16:13:57 +00:00
fs Assert that (vp) is locked in fifo_close(), since we rely on the 2005-09-18 10:44:50 +00:00
gdb check return value of gdb_rx_varhex 2005-03-28 18:31:18 +00:00
geom o Don't cause a panic when the control request lacks a verb. 2005-09-18 23:54:40 +00:00
gnu Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +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 Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +00:00
ia64 Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +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 Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +00:00
libkern - Fix checking range of strings of struct iconv_add_in in libsmb and libkiconv, 2005-08-24 12:38:26 +00:00
modules Fix the module build for snp(4). 2005-09-19 10:14:05 +00:00
net Drop current rtentry lock before calling rt_getifa(). This fixes a LOR 2005-09-19 16:27:22 +00:00
net80211 Properly set ic_curchan before calling back to device driver to do channel 2005-08-30 14:27:47 +00:00
netatalk Forward declare atalkdomain with static linkage, not extern, since 2005-09-11 16:04:56 +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 Dej'a vu of revision 1.35 2005-09-19 11:49:54 +00:00
netinet Take a first cut at cleaning up ifnet removal and multicast socket 2005-09-18 17:36:28 +00:00
netinet6 plugged a possible memory leak 2005-09-16 01:42:50 +00:00
netipsec Correct typo in a comment describing vshiftl(). 2005-06-02 23:56:10 +00:00
netipx Forward declaring static variables as extern is invalid ISO-C. Now that 2005-09-07 10:06:14 +00:00
netkey SADB_UPDATE did not return an error when key length is invalid. 2005-08-22 07:05:14 +00:00
netnatm Forward declaring static variables as extern is invalid ISO-C. Now that 2005-09-07 10:06:14 +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 Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +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 Introduce a kernel config for the Mandatory Access Control framework. 2005-09-18 03:15:36 +00:00
pccard Change a directory layout for pc98. 2005-05-10 12:02:18 +00:00
pci Add a new AGP driver for ATI IGP chipsets. The driver is based on reading of 2005-09-17 03:36:47 +00:00
posix4 Introduce MAC Framework and MAC Policy entry points to label and control 2005-05-04 10:39:15 +00:00
powerpc Introduce a kernel config for the Mandatory Access Control framework. 2005-09-18 03:15:36 +00:00
rpc Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +00:00
security Remove mac_create_root_mount() and mpo_create_root_mount(), which 2005-09-19 13:59:57 +00:00
sparc64 Introduce a kernel config for the Mandatory Access Control framework. 2005-09-18 03:15:36 +00:00
sys Remove macros 2005-09-19 08:07:18 +00:00
tools Allow EVFILT_VNODE events to work on every filesystem type, not just 2005-06-09 20:20:31 +00:00
ufs Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(), 2005-09-19 16:51:43 +00:00
vm Introduce a new lock for the purpose of synchronizing access to the 2005-09-09 06:03:08 +00:00
Makefile When building cscopnamefile, default architecture to ${MACHINE}, not i386. 2005-03-08 00:09:41 +00:00