linux/net
Rafael J. Wysocki 8314418629 Freezer: make kernel threads nonfreezable by default
Currently, the freezer treats all tasks as freezable, except for the kernel
threads that explicitly set the PF_NOFREEZE flag for themselves.  This
approach is problematic, since it requires every kernel thread to either
set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't
care for the freezing of tasks at all.

It seems better to only require the kernel threads that want to or need to
be frozen to use some freezer-related code and to remove any
freezer-related code from the other (nonfreezable) kernel threads, which is
done in this patch.

The patch causes all kernel threads to be nonfreezable by default (ie.  to
have PF_NOFREEZE set by default) and introduces the set_freezable()
function that should be called by the freezable kernel threads in order to
unset PF_NOFREEZE.  It also makes all of the currently freezable kernel
threads call set_freezable(), so it shouldn't cause any (intentional)
change of behaviour to appear.  Additionally, it updates documentation to
describe the freezing of tasks more accurately.

[akpm@linux-foundation.org: build fixes]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:02 -07:00
..
9p 9p: fix a race condition bug in umount which caused a segfault 2007-07-14 15:14:19 -05:00
802 [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
8021q [VLAN]: Fix memset length 2007-07-14 18:56:30 -07:00
appletalk [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
atm fallout from constified seq_operations 2007-07-15 16:40:52 -07:00
ax25 [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
bluetooth Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
bridge [NETFILTER]: Lower *tables printk severity 2007-07-14 20:46:15 -07:00
core Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
dccp [IPV6]: Do not send RH0 anymore. 2007-07-10 22:55:49 -07:00
decnet [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
econet [SK_BUFF]: Convert skb->tail to sk_buff_data_t 2007-04-25 22:26:28 -07:00
ethernet [ETH]: Validate address in eth_mac_addr 2007-07-11 19:41:18 -07:00
ieee80211 [PATCH] softmac: Fix ESSID problem 2007-07-10 14:27:00 -04:00
ipv4 [TCP]: Verify the presence of RETRANS bit when leaving FRTO 2007-07-15 00:19:29 -07:00
ipv6 [IPV6]: Call inet6addr_chain notifiers on link down 2007-07-15 00:16:35 -07:00
ipx [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
irda [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
iucv [AF_IUCV]: Add lock when updating accept_q 2007-07-14 19:04:25 -07:00
key xfrm: Add security check before flushing SAD/SPD 2007-06-07 13:42:46 -07:00
lapb [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
llc [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
mac80211 [PATCH] mac80211: improved 802.11g CTS protection 2007-07-12 16:07:26 -04:00
netfilter [NETFILTER]: nf_conntrack: UDPLITE support 2007-07-14 20:48:44 -07:00
netlabel Audit: add TTY input auditing 2007-07-16 09:05:47 -07:00
netlink [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
netrom [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
packet [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
rfkill [RFKILL]: fix net/rfkill/rfkill-input.c bug on 64-bit systems 2007-07-14 18:50:15 -07:00
rose [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
rxrpc [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
sched [NET_SCHED]: Kill CONFIG_NET_CLS_POLICE 2007-07-15 00:03:05 -07:00
sctp [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
sunrpc mm: clean up and kernelify shrinker registration 2007-07-17 10:23:00 -07:00
tipc [TIPC]: Optimize stream send routine to avoid fragmentation 2007-07-10 22:06:12 -07:00
unix [AF_UNIX]: Rewrite garbage collector, fixes race. 2007-07-11 14:22:39 -07:00
wanrouter [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
wireless [PATCH] cfg80211: Radiotap parser 2007-07-12 16:07:24 -04:00
x25 [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
xfrm [XFRM] Introduce standalone SAD lookup 2007-07-10 22:16:35 -07:00
compat.c O_CLOEXEC for SCM_RIGHTS 2007-07-16 09:05:45 -07:00
Kconfig 9p: Reorganization of 9p file system code 2007-07-14 15:13:40 -05:00
Makefile 9p: Reorganization of 9p file system code 2007-07-14 15:13:40 -05:00
nonet.c [PATCH] Make most file operations structs in fs/ const 2006-03-28 09:16:06 -08:00
socket.c O_CLOEXEC for SCM_RIGHTS 2007-07-16 09:05:45 -07:00
sysctl_net.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
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