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alistair23-linux/fs/nfs
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Jeff Layton 5d05e54af3 nfs: fix high load average due to callback thread sleeping 
Chuck pointed out a problem that crept in with commit 6ffa30d3f7 (nfs:
don't call blocking operations while !TASK_RUNNING). Linux counts tasks
in uninterruptible sleep against the load average, so this caused the
system's load average to be pinned at at least 1 when there was a
NFSv4.1+ mount active.

Not a huge problem, but it's probably worth fixing before we get too
many complaints about it. This patch converts the code back to use
TASK_INTERRUPTIBLE sleep, simply has it flush any signals on each loop
iteration. In practice no one should really be signalling this thread at
all, so I think this is reasonably safe.

With this change, there's also no need to game the hung task watchdog so
we can also convert the schedule_timeout call back to a normal schedule.

Cc: <stable@vger.kernel.org>
Reported-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Tested-by: Chuck Lever <chuck.lever@oracle.com>
Fixes: commit 6ffa30d3f7 (“nfs: don't call blocking . . .”)
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
 		2015-04-23 14:38:07 -04:00
..
blocklayout NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS 2015-03-27 12:39:38 -04:00
filelayout NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS 2015-03-27 12:39:38 -04:00
flexfilelayout NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS 2015-03-27 12:39:38 -04:00
objlayout NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS 2015-03-27 12:39:38 -04:00
Kconfig pnfs/flexfiles: Add the FlexFile Layout Driver 2015-02-03 11:06:52 -08:00
Makefile pnfs/flexfiles: Add the FlexFile Layout Driver 2015-02-03 11:06:52 -08:00
cache_lib.c NFS: simplify and clean cache library 2013-02-15 10:43:36 -05:00
cache_lib.h NFS: simplify and clean cache library 2013-02-15 10:43:36 -05:00
callback.c nfs: fix high load average due to callback thread sleeping 2015-04-23 14:38:07 -04:00
callback.h NFS: Add in v4.2 callback operation 2013-06-08 16:20:18 -04:00
callback_proc.c NFSv4.1: Don't set up a backchannel if the server didn't agree to do so 2015-02-18 12:30:47 -08:00
callback_xdr.c NFSv4.1: Convert open-coded array allocation calls to kmalloc_array() 2015-02-11 19:02:52 -05:00
client.c NFSv4: Fix a race in NFSv4.1 server trunking discovery 2015-03-03 20:42:23 -05:00
delegation.c NFSv4: Append delegations to the per-client list instead of prepending 2015-03-12 12:13:56 -04:00
delegation.h NFSv4: Fix races between nfs_remove_bad_delegation() and delegation return 2014-11-12 17:19:04 -05:00
dir.c NFS: Don't require a filehandle to refresh the inode in nfs_prime_dcache() 2015-03-01 23:23:07 -05:00
direct.c NFSv4.1/pnfs: Ensure that writes respect the O_SYNC flag when doing O_DIRECT 2015-03-27 12:39:37 -04:00
dns_resolve.c NFS: Enabling v4.2 should not recompile nfsd and lockd 2013-11-19 16:20:40 -05:00
dns_resolve.h NFS: DNS resolver cache per network namespace context introduced 2012-01-31 18:20:26 -05:00
file.c NFSv4.1/pnfs: Ensure that writes respect the O_SYNC flag when doing O_DIRECT 2015-03-27 12:39:37 -04:00
fscache-index.c NFS: Fabricate fscache server index key correctly 2014-09-25 21:25:18 -04:00
fscache.c nfs: define nfs_inc_fscache_stats and using it as possible 2014-11-24 20:08:47 -05:00
fscache.h NFS: Use i_writecount to control whether to get an fscache cookie in nfs_open() 2013-09-27 18:40:25 +01:00
getroot.c switch d_materialise_unique() users to d_splice_alias() 2014-11-19 13:01:20 -05:00
idmap.c pnfs/flexfiles: Add the FlexFile Layout Driver 2015-02-03 11:06:52 -08:00
inode.c NFS: Don't zap caches on fallocate() 2015-04-23 14:36:28 -04:00
internal.h NFS: Add attribute update barriers to NFS writebacks 2015-03-01 23:23:06 -05:00
iostat.h nfs: define nfs_inc_fscache_stats and using it as possible 2014-11-24 20:08:47 -05:00
mount_clnt.c nfs: have nfs_mount fake up a auth_flavs list when the server didn't provide it 2013-06-28 15:51:51 -04:00
namespace.c nfs: use %p[dD] instead of open-coded (and often racy) equivalents 2013-10-24 23:34:50 -04:00
netns.h pnfs/blocklayout: serialize GETDEVICEINFO calls 2014-11-12 14:22:52 -05:00
nfs.h NFS: Convert v4 into a module 2012-07-30 19:06:52 -04:00
nfs2super.c NFS: Convert v2 into a module 2012-07-30 19:06:41 -04:00
nfs2xdr.c nfs: save server READ/WRITE/COMMIT status 2015-02-03 11:06:40 -08:00
nfs3_fs.h nfsv3: introduce nfs3_set_ds_client 2015-02-03 11:06:34 -08:00
nfs3acl.c NFSv3: Fix missing includes of nfs3_fs.h 2014-09-25 16:28:53 -04:00
nfs3client.c nfs: set hostname when creating nfsv3 ds connection 2015-02-03 11:06:38 -08:00
nfs3proc.c NFS: Add attribute update barriers to NFS writebacks 2015-03-01 23:23:06 -05:00
nfs3super.c nfsv3: introduce nfs3_set_ds_client 2015-02-03 11:06:34 -08:00
nfs3xdr.c NFSv3: Use the readdir fileid as the mounted-on-fileid 2015-03-01 23:23:07 -05:00
nfs4_fs.h Merge branch 'flexfiles' 2015-02-03 16:01:27 -05:00
nfs4client.c NFSv4: Fix a race in NFSv4.1 server trunking discovery 2015-03-03 20:42:23 -05:00
nfs4file.c NFS: Reduce time spent holding the i_mutex during fallocate() 2015-04-23 14:36:28 -04:00
nfs4getroot.c NFSv4: Fix security auto-negotiation 2013-09-07 16:18:30 -04:00
nfs4namespace.c NFSv4: test SECINFO RPC_AUTH_GSS pseudoflavors for support 2014-06-24 18:46:58 -04:00
nfs4proc.c NFSv4.1: Don't cache deviceids that have no notifications 2015-03-27 12:32:24 -04:00
nfs4renewd.c NFSv4.1: Fix an NFSv4.1 state renewal regression 2014-09-30 17:18:42 -04:00
nfs4session.c NFSv4.1: Don't set up a backchannel if the server didn't agree to do so 2015-02-18 12:30:47 -08:00
nfs4session.h NFSv4.1: Clear the old state by our client id before establishing a new lease 2015-03-03 21:52:30 -05:00
nfs4state.c NFSv4.1: Clear the old state by our client id before establishing a new lease 2015-03-03 21:52:30 -05:00
nfs4super.c NFSv4: Return the delegation before returning the layout in evict_inode() 2015-03-27 12:39:35 -04:00
nfs4sysctl.c nfs: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:16 -07:00
nfs4trace.c NFSv4.1: Add tracepoints for debugging slot table operations 2013-08-22 08:58:27 -04:00
nfs4trace.h nfs: merge nfs_pgio_data into _header 2014-06-24 18:47:00 -04:00
nfs4xdr.c NFSv4.1: Allow getdeviceinfo to return notification info back to caller 2015-03-27 12:32:24 -04:00
nfs42.h nfs: Add DEALLOCATE support 2014-11-25 16:38:32 -05:00
nfs42proc.c NFS: Reduce time spent holding the i_mutex during fallocate() 2015-04-23 14:36:28 -04:00
nfs42xdr.c NFS: Don't zap caches on fallocate() 2015-04-23 14:36:28 -04:00
nfsroot.c NFS: a couple off by ones 2015-01-30 20:43:30 -05:00
nfstrace.c NFSv4: Allow tracing of NFSv4 fsync calls 2015-03-27 12:39:34 -04:00
nfstrace.h NFS: fix the handling of NFS_INO_INVALID_DATA flag in nfs_revalidate_mapping 2014-01-27 15:35:56 -05:00
pagelist.c NFS client updates for Linux 3.20 2015-02-11 17:14:54 -08:00
pnfs.c NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS 2015-03-27 12:39:38 -04:00
pnfs.h NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS 2015-03-27 12:39:38 -04:00
pnfs_dev.c NFSv4.1: Don't cache deviceids that have no notifications 2015-03-27 12:32:24 -04:00
pnfs_nfs.c NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS 2015-03-27 12:39:38 -04:00
proc.c NFS: Add attribute update barriers to NFS writebacks 2015-03-01 23:23:06 -05:00
read.c nfs: add mirroring support to pgio layer 2015-02-03 11:06:45 -08:00
super.c Merge branch 'for-3.20/bdi' of git://git.kernel.dk/linux-block 2015-02-12 13:50:21 -08:00
symlink.c
…
sysctl.c nfs: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:16 -07:00
unlink.c nfs: emit a fsnotify_nameremove call in sillyrename codepath 2014-03-17 15:14:17 -04:00
write.c NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS 2015-03-27 12:39:38 -04:00