Impact: make rt-limit tunables work again
Mark Glines reported:
> I've got an issue on x86-64 where I can't configure the system to allow
> RT tasks for a non-root user.
>
> In 2.6.26.5, I was able to do the following to set things up nicely:
> echo 450000 >/sys/kernel/uids/0/cpu_rt_runtime
> echo 450000 >/sys/kernel/uids/1000/cpu_rt_runtime
>
> Seems like every value I try to echo into the /sys files returns EINVAL.
For UID grouping we initialize the root group with infinite bandwidth
which by default is actually more than the global limit, therefore the
bandwidth check always fails.
Because the root group is a phantom group (for UID grouping) we cannot
runtime adjust it, therefore we let it reflect the global bandwidth
settings.
Reported-by: Mark Glines <mark@glines.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
On the Asus Xonar D2 and D2X models, the SPI chip select signal for the
fourth DAC shares its pin with the serial clock for the EEPROM that
contains the PCI subdevice ID values. It appears that when DAC
registers are written and some other unknown conditions occur (probably
noise on the EEPROM's chip select line), the EEPROM gets overwritten
with garbage, which makes it impossible to properly detect the card
later.
Therefore, we better avoid DAC register writes and make sure that the
driver works with the DAC's registers' default values. Consequently,
the sample format is now I2S instead of left-justified (no user-visible
change), and the DAC's volume/mute registers cannot be used anymore
(volume changes are now done by the software volume plugin).
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Fix a deadlock between child interface creation/deletion and ipoib
start/stop. The former takes vlan_mutex, and then might take RTNL via
register_netdev()/unregister_netdev(). The latter is executed with
RTNL held, and tries to take vlan_mutex, which can lead to an AB-BA
deadlock.
Fix this by having the child interface creation/deletion code take the
RTNL first so vlan_mutex always nests inside RTNL. We can use
register_netdevice() for child interfaces because we form the
interface name from the parent interface and hence don't need the '%'
expansion of register_netdev().
Reported-by: Yossi Etigin <yosefe@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Due to the loopback functionality in can_send() we can not invoke it
from hardirq context which was done inside the
bcm_tx_timeout_handler() hrtimer callback:
[ 700.361154] [<c012228c>] warn_slowpath+0x80/0xb6
[ 700.361163] [<c013d559>] valid_state+0x125/0x136
[ 700.361171] [<c013d858>] mark_lock+0x18e/0x332
[ 700.361180] [<c013e300>] __lock_acquire+0x12e/0xb1e
[ 700.361189] [<f8ab5915>] bcm_tx_timeout_handler+0x0/0xbc [can_bcm]
[ 700.361198] [<c031e20a>] dev_queue_xmit+0x191/0x479
[ 700.361206] [<c01262a7>] __local_bh_disable+0x2b/0x64
[ 700.361213] [<c031e20a>] dev_queue_xmit+0x191/0x479
[ 700.361225] [<f8aa69a1>] can_send+0xd7/0x11a [can]
[ 700.361235] [<f8ab522b>] bcm_can_tx+0x9d/0xd9 [can_bcm]
[ 700.361245] [<f8ab597f>] bcm_tx_timeout_handler+0x6a/0xbc [can_bcm]
[ 700.361255] [<f8ab5915>] bcm_tx_timeout_handler+0x0/0xbc [can_bcm]
[ 700.361263] [<c0134143>] __run_hrtimer+0x5a/0x86
[ 700.361273] [<f8ab5915>] bcm_tx_timeout_handler+0x0/0xbc [can_bcm]
[ 700.361282] [<c0134a50>] hrtimer_interrupt+0xb9/0x110
This patch moves the rest of the functionality from the hrtimer
callback to the already existing tasklet to fix this slowpath problem.
Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch hooks up the start_xmit/tx_timeout/get_stats callbacks
in the ax88796 driver since they no longer are installed by the
lib8390 code. Without this patch the function dev_hard_start_xmit()
crashes due to a start_xmit callback with the value NULL.
While at it, update the ax88796 driver to make use of use of struct
net_device_ops.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds an init_dummy_netdev() function that gets a network device
structure (allocation and lifetime entirely under caller's control) and
initialize the minimum amount of fields so it can be used to schedule
NAPI polls without registering a full blown interface. This is to be
used by drivers that need to tie several hardware interfaces to a single
NAPI poll scheduler due to HW limitations.
It also updates the ibm_newemac driver to use that, this fixing the
oops on 2.6.29 due to passing NULL as "dev" to netif_napi_add()
Symbol is exported GPL only a I don't think we want binary drivers doing
that sort of acrobatics (if we want them at all).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Taken from http://bugzilla.kernel.org/show_bug.cgi?id=12397
We're doing an sprintf of an 11-char string into an 11-char buffer.
Whoops. It breaks firmware uploading.
Reported-by: Jos-Vicente Gilabert <josevteg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
o Bail out if pci_map_single() fails while replenishing rx ring.
o Drop packet if pci_map_{single,page}() fail in tx.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Some firmware commands like mac address addition/deletion are sent
on the transmit ring. So need to hold the tx lock before touching
tx producer/consumer indices.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This fixes a tiny memory leak when driver is unloaded. The mac
address list maintained in netxen_adapter needs to deleted when
driver is going down.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
o Fix order or rom register writes.
o Reduce udelays when writing rom registers.
This cuts the firmware init time by 40%.
o Do not reset core/memory clocks when reinitializing driver.
Firmware willl handle this when initialized.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
o Read negotiated link speed when link state changes.
o Fix link speed reporting for hybrid nic boards, which have both 1Gbps and
10Gbps ports.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
o fix the ip/tcp hdr offset in tx descriptors for ipv6.
o cleanup xmit function, move the tso checks into separate function,
this reduces unnecessary endian conversions back and forth.
o optimize macros to initialize tx descriptors.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
o Set restricted (little endian) data types in firmware command
requests and responses.
o Remove unnecessary conversion to LE when writing registers.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The attached patch modifies the sis900 driver when the MAC address
read from the hardware is invalid. As suggested, the patch now
generates a random address so that the user can go on and use
the hardware. In any case a message is also shown to warn on the
unexpected condition.
This seems to happen with newer HW implementation of the sis900
chipset, since this never came up before.
Patch is against vanilla 2.6.28 (but the driver doesn't change so often,
so it will probably apply to older/newer versions too).
See bugzilla ID 10201 and 11649 and ignore the previous patch.
Signed-off-by: Daniele Venzano <venza@brownhat.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
If something goes wrong attaching to phy driver, we weren't freeing
the IRQ.
Signed-off-by: Mike Ditto <mditto@consentry.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When we get a GSO packet from an untrusted source, we need to
ensure that it is sufficiently long so that we don't end up
crashing.
Based on discovery and patch by Ian Campbell.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When an skb with page frags is merged into an existing one, we
cannibalise its reference count. This is OK when the skb is
reused because we set nr_frags to zero in that case. However,
for the case where the skb is freed through kfree_skb, we didn't
clear nr_frags which causes the page to be freed prematurely.
This is fixed by moving the skb resetting into skb_gro_receive.
Reported-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (29 commits)
powerpc/83xx: Move mcu_mpc8349emitx driver out of drivers/i2c/chips/
powerpc/83xx: Make serial ports work on MPC8315E-RDB w/ FSL U-Boots
powerpc/e500mc: Doorbells need to be taken w/exceptions disabled
powerpc: Enable PS3 options and QPACE in ppc64_defconfig
powerpc/powermac: Fix occasional SMP boot failure
powerpc/cacheinfo: Rename cache_dir per-cpu variable
hvc_console: Use kzalloc() instead of kmalloc() + memset()
hvc_console: Do not set low_latency when using interrupts
hvc_console: Call free_irq() only if request_irq() was successful
hvc_console: Change an mb() to smp_mb() and add some comments
powerpc: Cleanup from l64 to ll64 change: drivers/net
powerpc: Cleanup from l64 to ll64 change: drivers/char
powerpc: Cleanup from l64 to ll64 change: arch code
powerpc: Change u64/s64 to a long long integer type
powerpc/kexec: Check crash_base for relocatable kernel
powerpc: Make dummy section a valid note header
Xilinx: SPI: updated driver for device tree
drivers/of: Add the of_find_i2c_device_by_node function.
powerpc/xsysace: add compatible string for non-ipcore instance
powerpc/mpc52xx: remove dead code from GPIO driver
...
* 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (44 commits)
[CVE-2009-0029] s390 specific system call wrappers
[CVE-2009-0029] System call wrappers part 33
[CVE-2009-0029] System call wrappers part 32
[CVE-2009-0029] System call wrappers part 31
[CVE-2009-0029] System call wrappers part 30
[CVE-2009-0029] System call wrappers part 29
[CVE-2009-0029] System call wrappers part 28
[CVE-2009-0029] System call wrappers part 27
[CVE-2009-0029] System call wrappers part 26
[CVE-2009-0029] System call wrappers part 25
[CVE-2009-0029] System call wrappers part 24
[CVE-2009-0029] System call wrappers part 23
[CVE-2009-0029] System call wrappers part 22
[CVE-2009-0029] System call wrappers part 21
[CVE-2009-0029] System call wrappers part 20
[CVE-2009-0029] System call wrappers part 19
[CVE-2009-0029] System call wrappers part 18
[CVE-2009-0029] System call wrappers part 17
[CVE-2009-0029] System call wrappers part 16
[CVE-2009-0029] System call wrappers part 15
...
Add swab.h to kbuild.asm and remove the individual entries from
each arch, mark as unifdef as some arches have some kernel-only
bits inside.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Adjust the arch overrides to the new names as well.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-linus' of git://oss.sgi.com/xfs/xfs:
[XFS] Update maintainers
[XFS] use scalable vmap API
[XFS] remove old vmap cache
[XFS] make xfs_ino_t an unsigned long long
[XFS] truncate readdir offsets to signed 32 bit values
[XFS] fix compile of xfs_btree_readahead_lblock on m68k
[XFS] Remove macro-to-function indirections in the mask code
[XFS] Remove macro-to-function indirections in attr code
[XFS] Remove several unused typedefs.
[XFS] pass XFS_IGET_BULKSTAT to xfs_iget for handle operations
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6:
IDE: fix sparse signed-ness errors with host->host_busy
ide: fix suspend regression
tx4938ide: Fix build error due to read_sff_dma_status moving
ide: remove unused CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ
sl82c105: remove dead code
via82cxxx: fix cable warning message
ide: can't use SSD/non-rotational queue flag for all CFA devices
it821x.c: use dev->revision instead of pci_read_config_byte
it821x: Add ultra_mask quirk for Vortex86SX
ide: fix accidental LOCKDEP breakage caused by local_irq_set() removal
After commit fe25c561 ("IPoIB: Don't enable NAPI when it's already
enabled"), if an interface is brought up but the corresponding P_Key
never appears, then ipoib_stop() will hang in napi_disable(), because
ipoib_open() returns before it does napi_enable().
Fix this by changing ipoib_open() to call napi_enable() even if the
P_Key isn't present.
Reported-by: Yossi Etigin <yosefe@Voltaire.COM>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Minor cleanups, either made possible or obvious after commit d700555 (I4l:
convert to net_device_ops).
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
When an i4l ppp interface is shut down (e.g. with /sbin/ifdown ippp0) a
scary warning is logged:
isdn_free_channel: called with invalid drv(-1) or channel(-1)
This warning is caused by isdn_net_unbind_channel(), which always calls
isdn_free_channel() even if isdn_net_local->isdn_device and
isdn_net_local->isdn_channel are (still) in a perfectly acceptable
default state, so let's not do that.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Freescale on-chip TBI PHYs reports PHY ID as 0x0, but as of
commit 3ee82383f0
Author: Giulio Benetti <giulio.benetti@micronovasrl.com>
Date: Thu Nov 13 21:53:13 2008 +0000
phy: fix phy address bug
PHYID returns 0xffff and not 0xffffffff when not found and in some
case(at91sam9263) 0x0. Maybe this patch could be useful.
phy_device.c treats PHY ID == 0x0 as bogus IDs, and that results in
gianfar driver failure to see the TBI PHYs. This code snippet triggers:
if (!priv->tbiphy) {
printk(KERN_WARNING "SGMII mode requires that the device "
"tree specify a tbi-handle\n");
return;
}
Although tbi-handle is specified in the device tree.
Btw, technically PHY ID == 0x0 is a valid ID (if we ever see a PHY
manufactured by Xerox :-).
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As GRO cannot be applied to packets with frag_list we need to
make sure that we reject such packets if they are fed to us,
e.g., through a tunnel device.
Also there is no point in applying GRO on GSO packets so they
too should be rejected. This allows GRO to be used in virtio-net
which may produce GSO packets directly but may still benefit
from GRO if the other end of it doesn't support GSO.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Reported by Russell King:
drivers/net/arm/etherh.c:649: error: unknown field 'ndo_set_mac_addr' specified in initializer
Signed-off-by: David S. Miller <davem@davemloft.net>
The host_busy field in struct ide_host defaults to a
signed-long, where most arch's test_and_set_bit_*
macros use an unsigned long.
Change to using an unsigned long, which on ARM removes
the following sparse errors:
drivers/ide/ide-io.c:681:8: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:681:8: expected unsigned long volatile *p
drivers/ide/ide-io.c:681:8: got long volatile *<noident>
drivers/ide/ide-io.c:681:8: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:681:8: expected unsigned long volatile *p
drivers/ide/ide-io.c:681:8: got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3: expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3: got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3: expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3: got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3: expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3: got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3: expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3: got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3: expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3: got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3: expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3: got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3: expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3: got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3: expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3: got long volatile *<noident>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
On Monday 12 January 2009, Simon Holm Thøgersen wrote:
> commit 295f000 ("ide: don't execute the next queued command from the
> hard-IRQ context (v2)") breaks suspend to disk for me. On
> 'echo disk > /sys/power/state' the systems hangs, letting me switch
> virtual consoles, but not responding to Alt+SysRq
Restart the request queue early for REQ_TYPE_PM_RESUME requests
(though there is only one resume request for the whole resume
sequence it stays in the queue until is fully completed and now
depends on kblockd for processing consequential resume states).
Reported-and-bisected-by: Simon Holm Thøgersen <odie@cs.aau.dk>
Tested-by: Simon Holm Thøgersen <odie@cs.aau.dk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
CONFIG_LOPEC and CONFIG_SANDPOINT config options are gone.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Some rotating disks also present themselves as CFA devices.
Reported-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
On Vortex86SX with IDE controller revision 0x11 ultra DMA must be
disabled. This patch was tested by DMP and seems to work.
It is a cleaned up version of their older Kernel patch:
http://www.dmp.com.tw/tech/vortex86sx/patch-2.6.24-DMP.gz
Tested-by: Shawn Lin <shawn@dmp.com.tw>
Signed-off-by: Brandon Philips <bphilips@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
commit 54cc1428cf ("ide: remove
local_irq_set() macro") accidentally replaced local_save_flags()
by local_irq_set() in ide_probe_port() and __ide_wait_stat()
which resulted in LOCKDEP breakage.
Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Fix the sparc build - we were including `up.o' on SMP builds, when
CONFIG_USE_GENERIC_SMP_HELPERS=n.
Tested-by: Robert Reif <reif@earthlink.net>
Fixed-by: Robert Reif <reif@earthlink.net>
Cc: David Miller <davem@davemloft.net>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This assertion is incorrect for lockless pagecache. By definition if we
have an unpinned page that we are trying to take a speculative reference
to, it may become the tail of a compound page at any time (if it is
freed, then reallocated as a compound page).
It was still a valid assertion for the vmscan.c LRU isolation case, but
it doesn't seem incredibly helpful... if somebody wants it, they can
put it back directly where it applies in the vmscan code.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The selector widget 0x0e isn't initialized properly in the whole probe
process, thus it can be a wrong value depending on the BIOS setup.
This patch adds the init verb to set it to the max & unmuted.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
