Use struct net_device_stats provided in struct net_device instead of
private ones.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use ALIGN() and PTR_ALIGN() macros instead of handcoding them.
Get rid of NETDEV_ALIGN_CONST ugly define
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch removes the not-that-useful message in the
r6040_timer which prints the PHY status. Instead
replace it with a call to mii_check_media which will
update the link status and print it on startup.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The 'dev' field of struct acpi_pci_data is having a pointer to struct
pci_dev without incrementing the reference counter. Because of this, I
got the following kernel oops when I was doing some pci hotplug
operations. This patch fixes this bug by replacing wrong hand-made
pci_find_slot() with pci_get_slot() in acpi_pci_bind().
BUG: unable to handle kernel NULL pointer dereference at 00000000000000e8
IP: [<ffffffff803f0e9b>] acpi_pci_unbind+0xb1/0xdd
Call Trace:
[<ffffffff803ecee4>] acpi_bus_remove+0x54/0x68
[<ffffffff803ecf6d>] acpi_bus_trim+0x75/0xe3
[<ffffffffa0345ddd>] acpiphp_disable_slot+0x16d/0x1e0 [acpiphp]
[<ffffffffa03441f0>] disable_slot+0x20/0x60 [acpiphp]
[<ffffffff803cfc18>] power_write_file+0xc8/0x110
[<ffffffff803c6a54>] pci_slot_attr_store+0x24/0x30
[<ffffffff803469ce>] sysfs_write_file+0xce/0x140
[<ffffffff802e94e7>] vfs_write+0xc7/0x170
[<ffffffff802e9aa0>] sys_write+0x50/0x90
[<ffffffff8020bd6b>] system_call_fastpath+0x16/0x1b
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reviewed-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Reviewed-by: Alex Chiang <achiang@hp.com>
Tested-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
T3 firmware only supports one WRs worth of page list for fast register
work requests. The driver currently allows 2 WRs worth, which
doesn't work for T3, so reduce the limit in the driver.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Commit 'Short write in nfsd becomes a full write to the client'
(31dec2538e) broken the sync write.
With the following commands to reproduce:
$ mount -t nfs -o sync 192.168.0.21:/nfsroot /mnt
$ cd /mnt
$ echo aaaa > temp.txt
Then nfs client is hung up.
In SYNC mode the server alaways return the write count 0 to the
client. This is because the value of host_err in nfsd_vfs_write()
will be overwrite in SYNC mode by 'host_err=nfsd_sync(file);',
and then we return host_err(which is now 0) as write count.
This patch fixed the problem.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
The current MTT allocator uses kmalloc() to allocate a buffer for its
buddy allocator, and thus is limited in the amount of MTT segments
that it can control. As a result, the size of memory that can be
registered is limited too. This patch uses a module parameter to
control the number of MTT entries that each segment represents,
allowing more memory to be registered with the same number of
segments.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
The current MTT allocator uses kmalloc() to allocate a buffer for its
buddy allocator, and thus is limited in the amount of MTT segments
that it can control. As a result, the size of memory that can be
registered is limited too. This patch uses a module parameter to
control the number of MTT entries that each segment represents,
allowing more memory to be registered with the same number of
segments.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
We we build with dma_addr_t as a 64-bit quantity we get:
drivers/dma/fsldma.c: In function 'fsl_chan_xfer_ld_queue':
drivers/dma/fsldma.c:625: warning: cast to pointer from integer of different size
drivers/dma/fsldma.c: In function 'fsl_dma_chan_do_interrupt':
drivers/dma/fsldma.c:737: warning: cast to pointer from integer of different size
drivers/dma/fsldma.c:737: warning: cast to pointer from integer of different size
drivers/dma/fsldma.c: In function 'of_fsl_dma_probe':
drivers/dma/fsldma.c:927: warning: cast to pointer from integer of different
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This error condition:
aldebaran:~/linux/linux/Documentation/perf_counter> perf report
dso__load_sym: cannot get elf header.
failed to open: /etc/ld.so.cache
problem processing PERF_EVENT_MMAP, bailing out
caused the profile to be very short - as the error was at the beginning
of the file and we bailed out completely.
Be more permissive and consider the event broken instead.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
When a GEM object is evicted from the GTT we set it to the CPU domain,
as it might get swapped in and out or ever mmapped regularly. If the
object is mmapped through the GTT it can still get evicted in this way
by other objects requiring GTT space. When the GTT mapping is touched
again we fault it back into the GTT, but fail to set it back to the
GTT domain. This means we fail to flush any cached CPU writes to the
pages backing the object which will then happen "eventually", typically
after we write to the page through the uncached GTT mapping.
[anholt: Note that userland does do a set_domain(GTT, GTT) when starting
to access the GTT mapping. That covers getting the existing mapping of the
object synchronized if it's bound to the GTT. But set_domain(GTT, GTT)
doesn't do anything if the object is currently unbound. This fix covers the
transition to being bound for GTT mapping.]
Fixes glyph and other pixmap corruption during swapping. fd.o bug #21790
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
The file nfsfh.c contains two static variables nfsd_nr_verified and
nfsd_nr_put. These are counters which are incremented as a side
effect of the fh_verify() fh_compose() and fh_put() operations,
i.e. at least twice per NFS call for any non-trivial workload.
Needless to say this makes the cacheline that contains them (and any
other innocent victims) a very hot contention point indeed under high
call-rate workloads on multiprocessor NFS server. It also turns out
that these counters are not used anywhere. They're not reported to
userspace, they're not used in logic, they're not even exported from
the object file (let alone the module). All they do is waste CPU time.
So this patch removes them.
Tests on a 16 CPU Altix A4700 with 2 10gige Myricom cards, configured
separately (no bonding). Workload is 640 client threads doing directory
traverals with random small reads, from server RAM.
Before
======
Kernel profile:
% cumulative self self total
time samples samples calls 1/call 1/call name
6.05 2716.00 2716.00 30406 0.09 1.02 svc_process
4.44 4706.00 1990.00 1975 1.01 1.01 spin_unlock_irqrestore
3.72 6376.00 1670.00 1666 1.00 1.00 svc_export_put
3.41 7907.00 1531.00 1786 0.86 1.02 nfsd_ofcache_lookup
3.25 9363.00 1456.00 10965 0.13 1.01 nfsd_dispatch
3.10 10752.00 1389.00 1376 1.01 1.01 nfsd_cache_lookup
2.57 11907.00 1155.00 4517 0.26 1.03 svc_tcp_recvfrom
...
2.21 15352.00 1003.00 1081 0.93 1.00 nfsd_choose_ofc <----
^^^^
Here the function nfsd_choose_ofc() reads a global variable
which by accident happened to be located in the same cacheline as
nfsd_nr_verified.
Call rate:
nullarbor:~ # pmdumptext nfs3.server.calls
...
Thu Dec 13 00:15:27 184780.663
Thu Dec 13 00:15:28 184885.881
Thu Dec 13 00:15:29 184449.215
Thu Dec 13 00:15:30 184971.058
Thu Dec 13 00:15:31 185036.052
Thu Dec 13 00:15:32 185250.475
Thu Dec 13 00:15:33 184481.319
Thu Dec 13 00:15:34 185225.737
Thu Dec 13 00:15:35 185408.018
Thu Dec 13 00:15:36 185335.764
After
=====
kernel profile:
% cumulative self self total
time samples samples calls 1/call 1/call name
6.33 2813.00 2813.00 29979 0.09 1.01 svc_process
4.66 4883.00 2070.00 2065 1.00 1.00 spin_unlock_irqrestore
4.06 6687.00 1804.00 2182 0.83 1.00 nfsd_ofcache_lookup
3.20 8110.00 1423.00 10932 0.13 1.00 nfsd_dispatch
3.03 9456.00 1346.00 1343 1.00 1.00 nfsd_cache_lookup
2.62 10622.00 1166.00 4645 0.25 1.01 svc_tcp_recvfrom
[...]
0.10 42586.00 44.00 74 0.59 1.00 nfsd_choose_ofc <--- HA!!
^^^^
Call rate:
nullarbor:~ # pmdumptext nfs3.server.calls
...
Thu Dec 13 01:45:28 194677.118
Thu Dec 13 01:45:29 193932.692
Thu Dec 13 01:45:30 194294.364
Thu Dec 13 01:45:31 194971.276
Thu Dec 13 01:45:32 194111.207
Thu Dec 13 01:45:33 194999.635
Thu Dec 13 01:45:34 195312.594
Thu Dec 13 01:45:35 195707.293
Thu Dec 13 01:45:36 194610.353
Thu Dec 13 01:45:37 195913.662
Thu Dec 13 01:45:38 194808.675
i.e. about a 5.3% improvement in call rate.
Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Reviewed-by: David Chinner <dgc@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Fix a regression in the reply cache introduced when the code was
converted to use proper Linux lists. When a new entry needs to be
inserted, the case where all the entries are currently being used
by threads is not correctly detected. This can result in memory
corruption and a crash. In the current code this is an extremely
unlikely corner case; it would require the machine to have 1024
nfsd threads and all of them to be busy at the same time. However,
upcoming reply cache changes make this more likely; a crash due to
this problem was actually observed in field.
Signed-off-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Make REQHASH() an inline function. Rename hash_list to cache_hash.
Fix an obsolete comment.
Signed-off-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Fix up dma_alloc_coherent() on platforms without cache coherency.
powerpc: Minor cleanups of kernel virt address space definitions
powerpc: Move dma-noncoherent.c from arch/powerpc/lib to arch/powerpc/mm
Revert "powerpc: Rework dma-noncoherent to use generic vmalloc layer"
Fix up renamed filenames in comments in fs/cachefiles/internal.h.
Originally, the files were all called cf-xxx.c, but they got renamed to
just xxx.c.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix up renamed filenames in comments in fs/fscache/internal.h.
Originally, the files were all called fsc-xxx.c, but they got renamed to
just xxx.c.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch adds CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ that exposes
the u64 handshake sequence number to user-space.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This problem was introduced in 72961ecf84
since no space was reserved for the new attributes NFULA_HWTYPE,
NFULA_HWLEN and NFULA_HWHEADER.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
The function dl_seq_show() returns 1 (equal to SEQ_SKIP) in case
a seq_printf() call return -1. It should return -1.
This SEQ_SKIP behavior brakes processing the proc file e.g. via a
pipe or just through less.
Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: Patrick McHardy <kaber@trash.net>
A call from irq_exit() may occasionally pause the timing
info for cpufreq ondemand governor. This results in the
cpufreq ondemand governor to fail to calculate the
system load properly. Thus, relocate the checks for this
particular case to keep the governor always functional.
Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
Reported-by: Tero Kristo <tero.kristo@nokia.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
it's a little too large for static line.
The ts is currently the only mainline user but Marek Vasut claims that
there is a battery driver in an ARM tree which also needs this function.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
platform_data != driver_data
driver data is actually the "correct" place of the struct however it is
not placed there due to the need of the ac97 struct. This is broken since
d9105c2b01 aka "[ARM] 5184/1: Split ucb1400_ts into core and touchscreen"
Signed-off-by: Manuel Traut <manut@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
The commit below in 2.6-block/for-2.6.31 causes no diskstat problem
because the blk_discard_rq() check was added with '&&'.
It should be 'blk_fs_request() || blk_discard_rq()'.
This patch does it and fixes the no diskstat problem.
Please review and apply.
------ /proc/diskstat without this patch -------------------------------------
8 0 sda 0 0 0 0 0 0 0 0 0 0 0
------------------------------------------------------------------------------
----- /proc/diskstat with this patch applied ---------------------------------
8 0 sda 4186 303 373621 61600 9578 3859 107468 169479 2 89755 231059
------------------------------------------------------------------------------
--------------------------------------------------------------------------
commit c69d48540c
Author: Jens Axboe <jens.axboe@oracle.com>
Date: Fri Apr 24 08:12:19 2009 +0200
block: include discard requests in IO accounting
We currently don't do merging on discard requests, but we potentially
could. If we do, then we need to include discard requests in the IO
accounting, or merging would end up decrementing in_flight IO counters
for an IO which never incremented them.
So enable accounting for discard requests.
<snip>
static inline int blk_do_io_stat(struct request *rq)
{
- return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq);
+ return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq) &&
+ blk_discard_rq(rq);
}
--------------------------------------------------------------------------
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
commit e8939a50466fd963eb1ba9118c34b9ffb7ff6aa6
Author: Tejun Heo <tj@kernel.org>
Date: Fri May 8 11:54:16 2009 +0900
block: implement and enforce request peek/start/fetch
Added a BUG_ON(blk_queued_rq(req)) to the top of blk_finish_req().
Unfortunately, this checks whether req->queuelist is empty. This list
is doing double duty both as the queue list and the tag list, so tagged
requests come in here with this not empty and boom (the tag list is
emptied by blk_queue_end_tag() lower down).
Fix this by moving the BUG_ON to below the end tag we also seem
vulnerable to this in blk_requeue_request() as well. I think all uses
of blk_queued_rq() need auditing because the check is clearly wrong in
the tagged case.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
A recent patch to raid5.c use min on an int and a sector_t.
This isn't allowed.
So change it to min_t(sector_t,x,y).
Signed-off-by: NeilBrown <neilb@suse.de>
Pekka reported build failure in builtin-report.c:
CC builtin-report.o
In file included from builtin-report.c:7:
/usr/include/ctype.h:102: error: expected expression before token
And observed:
| Removing #include <ctype.h> from builtin-report.c makes the problem
| go away. I am running Ubuntu 9.04 that has gcc 4.3.3 and libc 2.9.
Reported-by: Pekka J Enberg <penberg@cs.helsinki.fi>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Perf record bails if no command argument is provided, so you can't use
naked -a or -p to profile a running task or the whole box.
Allow foreground profiling of an existing pid or the entire system.
[ Impact: fix command option handling bug ]
Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
There is no need to repeatedly check flush when comparing TCP
options for GRO as it will be false 99% of the time where it
matters.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch stores the two shinfo pointers in local variables
because they're used over and over again in skb_gro_receive.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch reverses the direction of the frags array copy in
skb_gro_receive in order simplify the loop conditional. It
also avoids touching the first element of the original frags
array.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
As we know the only packets which need the final pskb_may_pull
are completely non-linear, and have all the required bits in
frag0, we can perform a straight memcpy instead of going through
pskb_may_pull and doing skb_copy_bits.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch optimises the IPv4 GRO code by using 32-bit loads
(instead of 16-bit ones) on the ID and length checks in the receive
function.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
