linux/fs/nfsd
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
..
auth.c [PATCH] knfsd: nfsd: nfsd_setuser doesn't really need to modify rqstp->rq_cred. 2006-04-11 06:18:52 -07:00
export.c knfsd: avoid use of unitialised variables on error path when nfs exports 2007-05-09 12:30:54 -07:00
lockd.c [PATCH] lockd endianness annotations 2006-12-13 09:05:52 -08:00
Makefile knfsd: trivial makefile cleanup 2007-05-09 12:30:54 -07:00
nfs2acl.c [PATCH] Fix a free-wrong-pointer bug in nfs/acl server. 2007-02-19 16:13:28 -08:00
nfs3acl.c [PATCH] NFS3: Calculate 'w' a bit later in nfs3svc_encode_getaclres() 2006-12-08 08:29:02 -08:00
nfs3proc.c RPC: add wrapper for svc_reserve to account for checksum 2007-05-09 12:30:54 -07:00
nfs3xdr.c knfsd: various nfsd xdr cleanups 2007-05-09 12:30:54 -07:00
nfs4acl.c remove nfs4_acl_add_ace() 2007-05-09 12:30:54 -07:00
nfs4callback.c SUNRPC: Add a convenient default for the hostname when calling rpc_create() 2007-07-10 23:40:46 -04:00
nfs4idmap.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
nfs4proc.c [PATCH] knfsd: nfsd4: simplify filehandle check 2006-12-13 09:05:54 -08:00
nfs4recover.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
nfs4state.c SUNRPC: Remove redundant calls to rpciod_up()/rpciod_down() 2007-07-10 23:40:30 -04:00
nfs4xdr.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
nfscache.c [PATCH] knfsd: SUNRPC: Provide room in svc_rqst for larger addresses 2007-02-12 09:48:36 -08:00
nfsctl.c [PATCH] knfsd: fix return value for writes to some files in 'nfsd' filesystem 2007-02-14 08:09:53 -08:00
nfsfh.c knfsd: avoid Oops if buggy userspace performs confusing filehandle->dentry mapping 2007-05-09 12:30:54 -07:00
nfsproc.c RPC: add wrapper for svc_reserve to account for checksum 2007-05-09 12:30:54 -07:00
nfssvc.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
nfsxdr.c knfsd: various nfsd xdr cleanups 2007-05-09 12:30:54 -07:00
stats.c [PATCH] knfsd: nfsd4: add per-operation server stats 2006-07-10 13:24:27 -07:00
vfs.c nfsd: fix nfsd_vfs_read() splice actor setup 2007-07-13 16:45:43 -07:00