15 May, 2010
3 commits
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It has not triggered in almost a decade. Time to get rid of it...
Signed-off-by: Trond Myklebust
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Currently RPC performance metrics that tabulate elapsed time use
jiffies time values. This is problematic on systems that use slow
jiffies (for instance 100HZ systems built for paravirtualized
environments). It is also a problem for computing precise latency
statistics for advanced network transports, such as InfiniBand,
that can have round-trip latencies significanly faster than a single
clock tick.For the RPC client, adopt the high resolution time stamp mechanism
already used by the network layer and blktrace: ktime.We use ktime format time stamps for all internal computations, and
convert to milliseconds for presentation. As a result, we need only
addition operations in the performance critical paths; multiply/divide
is required only for presentation.We could report RTT metrics in microseconds. In fact the mountstats
format is versioned to accomodate exactly this kind of interface
improvement.For now, however, we'll stay with millisecond precision for
presentation to maintain backwards compatibility with the handful of
currently deployed user space tools. At a later point, we'll move to
an API such as BDI_STATS where a finer timestamp precision can be
reported.Signed-off-by: Chuck Lever
Signed-off-by: Trond Myklebust -
Also have it return an ERR_PTR(-ENOMEM) instead of a null pointer.
Reviewed-by: Chuck Lever
Signed-off-by: Trond Myklebust
16 Dec, 2009
2 commits
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Signed-off-by: Alexandros Batsakis
Signed-off-by: Trond Myklebust -
Signed-off-by: Alexandros Batsakis
Signed-off-by: Trond Myklebust
11 Sep, 2009
1 commit
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Move struct rpc_buffer's definition into a sunrpc.h, a common, internal
header file, in preparation for supporting the nfsv4.1 backchannel.Signed-off-by: Benny Halevy
[nfs41: sunrpc: #include from sunrpc.h]
Signed-off-by: Benny Halevy
Signed-off-by: J. Bruce Fields
13 Jul, 2009
1 commit
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* Remove smp_lock.h from files which don't need it (including some headers!)
* Add smp_lock.h to files which do need it
* Make smp_lock.h include conditional in hardirq.h
It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPTThis will make hardirq.h inclusion cheaper for every PREEMPT=n config
(which includes allmodconfig/allyesconfig, BTW)Signed-off-by: Alexey Dobriyan
Signed-off-by: Linus Torvalds
18 Jun, 2009
1 commit
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Signed-off-by: Andy Adamson
Signed-off-by: Benny Halevy
Signed-off-by: Trond Myklebust
11 Mar, 2009
1 commit
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We should probably not be testing any flags after we've cleared the
RPC_TASK_RUNNING flag, since rpc_make_runnable() is then free to assign the
rpc_task to another workqueue, which may then destroy it.We can fix any races with rpc_make_runnable() by ensuring that we only
clear the RPC_TASK_RUNNING flag while holding the rpc_wait_queue->lock that
the task is supposed to be sleeping on (and then checking whether or not
the task really is sleeping).Signed-off-by: Trond Myklebust
16 Jul, 2008
1 commit
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Push it into those callback functions that actually need it.
Note that all the NFS operations use their own locking, so don't need the
BKL. Ditto for the rpcbind client.Signed-off-by: Trond Myklebust
10 Jul, 2008
1 commit
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Try to make the comment here a little more clear and concise.
Also, this macro definition seems unnecessary.
Signed-off-by: J. Bruce Fields
Signed-off-by: Trond Myklebust
15 Mar, 2008
2 commits
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Signed-off-by: Trond Myklebust
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The current RPCAUTH_LOOKUP_ROOTCREDS flag only works for AUTH_SYS
authentication, and then only as a special case in the code. This patch
removes the auth_sys special casing, and replaces it with generic code.Signed-off-by: Trond Myklebust
29 Feb, 2008
5 commits
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Now that we've tightened up the locking rules for RPC queue wakeups, we can
remove the RCU-safe kfree calls...Signed-off-by: Trond Myklebust
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Signed-off-by: Trond Myklebust
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Signed-off-by: Trond Myklebust
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This is designed to replace the timeout timer in the individual rpc_tasks.
By putting the timer function in the wait queue, we will eventually be able
to reduce the total number of timers in use by the RPC subsystem.Signed-off-by: Trond Myklebust
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Signed-off-by: Trond Myklebust
26 Feb, 2008
5 commits
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An audit of the current RPC timeout functions shows that they don't really
ever need to run in the softirq context. As long as the softirq is
able to signal that the wakeup is due to a timeout (which it can do by
setting task->tk_status to -ETIMEDOUT) then the callback functions can just
run as standard task->tk_callback functions (in the rpciod/process
context).The only possible border-line case would be xprt_timer() for the case of
UDP, when the callback is used to reduce the size of the transport
congestion window. In testing, however, the effect of moving that update
to a callback would appear to be minor.Signed-off-by: Trond Myklebust
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Signed-off-by: Trond Myklebust
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In all cases where we currently use rpc_wake_up_task(), we almost always
know on which waitqueue the rpc_task is actually sleeping. This will allows
us to simplify the queue locking in a future patch.Signed-off-by: Trond Myklebust
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All RPC timeout callback functions are expected to wake the task up. We can
enforce this by moving the wakeup back into rpc_run_timer.Signed-off-by: Trond Myklebust
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A lot of the work done by the rpc_release() callback is inappropriate for
rpciod as it will often involve things like starting a new rpc call in
order to clean up state after an interrupted NFSv4 open() call, or
calls to mntput(), etc.This patch allows the caller of rpc_run_task() to specify that the
rpc_release callback should run on a different workqueue than the default
rpciod_workqueue.Signed-off-by: Trond Myklebust
01 Feb, 2008
1 commit
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* 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc: (22 commits)
Remove commented-out code copied from NFS
NFS: Switch from intr mount option to TASK_KILLABLE
Add wait_for_completion_killable
Add wait_event_killable
Add schedule_timeout_killable
Use mutex_lock_killable in vfs_readdir
Add mutex_lock_killable
Use lock_page_killable
Add lock_page_killable
Add fatal_signal_pending
Add TASK_WAKEKILL
exit: Use task_is_*
signal: Use task_is_*
sched: Use task_contributes_to_load, TASK_ALL and TASK_NORMAL
ptrace: Use task_is_*
power: Use task_is_*
wait: Use TASK_NORMAL
proc/base.c: Use task_is_*
proc/array.c: Use TASK_REPORT
perfmon: Use task_is_*
...Fixed up conflicts in NFS/sunrpc manually..
30 Jan, 2008
8 commits
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Signed-off-by: Trond Myklebust
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Signed-off-by: Trond Myklebust
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Signed-off-by: Trond Myklebust
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In preparation for the removal of rpc_call_setup().
Signed-off-by: Trond Myklebust
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We want the default scheduling priority (priority == 0) to remain
RPC_PRIORITY_NORMAL.Also ensure that the priority wait queue scheduling is per process id
instead of sometimes being per thread, and sometimes being per inode.Signed-off-by: Trond Myklebust
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Signed-off-by: Trond Myklebust
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The sunrpc client exports are not meant to be part of any official kernel
API: they can change at the drop of a hat. Mark them as internal functions
using EXPORT_SYMBOL_GPL.Signed-off-by: Trond Myklebust
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Do this for all RPC client related functions and XDR functions.
Signed-off-by: Trond Myklebust
29 Jan, 2008
1 commit
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Many-many code in the kernel initialized the timer->function
and timer->data together with calling init_timer(timer). There
is already a helper for this. Use it for networking code.The patch is HUGE, but makes the code 130 lines shorter
(98 insertions(+), 228 deletions(-)).Signed-off-by: Pavel Emelyanov
Acked-by: Arnaldo Carvalho de Melo
Signed-off-by: David S. Miller
07 Dec, 2007
1 commit
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By using the TASK_KILLABLE infrastructure, we can get rid of the 'intr'
mount option. We have to use _killable everywhere instead of _interruptible
as we get rid of rpc_clnt_sigmask/sigunmask.Signed-off-by: Liam R. Howlett
Signed-off-by: Matthew Wilcox
20 Oct, 2007
1 commit
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The task_struct->pid member is going to be deprecated, so start
using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in
the kernel.The first thing to start with is the pid, printed to dmesg - in
this case we may safely use task_pid_nr(). Besides, printks produce
more (much more) than a half of all the explicit pid usage.[akpm@linux-foundation.org: git-drm went and changed lots of stuff]
Signed-off-by: Pavel Emelyanov
Cc: Dave Airlie
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Oct, 2007
1 commit
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SUNRPC: add EXPORT_SYMBOL_GPL for generic transport functions
As a preface to allowing arbitrary transport modules to be loaded
dynamically, add EXPORT_SYMBOL_GPL for all generic transport functions
that a transport implementation might want to use.Signed-off-by: Chuck Lever
Acked-by: Tom TalpeySigned-off-by: Trond Myklebust
08 Aug, 2007
1 commit
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The commit 4ada539ed77c7a2bbcb75cafbbd7bd8d2b9bef7b lead to the unpleasant
possibility of an asynchronous rpc_task being required to call
rpciod_down() when it is complete. This again means that the rpciod
workqueue may get to call destroy_workqueue on itself -> hang...Change rpciod_up/rpciod_down to just get/put the module, and then
create/destroy the workqueues on module load/unload.Signed-off-by: Trond Myklebust
20 Jul, 2007
1 commit
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Slab destructors were no longer supported after Christoph's
c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been
BUGs for both slab and slub, and slob never supported them
either.This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).Signed-off-by: Paul Mundt
11 Jul, 2007
2 commits
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Signed-off-by: Trond Myklebust
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Signed-off-by: Trond Myklebust