Problem description at:
http://bugzilla.kernel.org/show_bug.cgi?id=8048
Commit b18ec80396
[PATCH] sched: improve migration accuracy
optimized the scheduler time calculations, but broke posix-cpu-timers.
The problem is that the p->last_ran value is not updated after a context
switch. So a subsequent call to current_sched_time() calculates with a
stale p->last_ran value, i.e. accounts the full time, which the task was
scheduled away.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
eCryptfs lower file handling code has several issues:
- Retval from prepare_write()/commit_write() wasn't checked to equality
to AOP_TRUNCATED_PAGE.
- In some places page wasn't unmapped and unlocked after error.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Allow space(s) between "__attribute__" and "((blah))" so that
kernel-doc does not complain like:
Warning(/tester/linsrc/linux-2.6.20-git15//kernel/timer.c:939): No description found for parameter 'read_persistent_clock(void'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
FRV does not require a ZONE_DMA, so all DMA'able pages that aren't highmem
should be in ZONE_NORMAL.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
i.e. one or more drives can be added and the array will re-stripe
while on-line.
Most of the interesting work was already done for raid5. This just extends it
to raid6.
mdadm newer than 2.6 is needed for complete safety, however any version of
mdadm which support raid5 reshape will do a good enough job in almost all
cases (an 'echo repair > /sys/block/mdX/md/sync_action' is recommended after a
reshape that was aborted and had to be restarted with an such a version of
mdadm).
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
An error always aborts any resync/recovery/reshape on the understanding that
it will immediately be restarted if that still makes sense. However a reshape
currently doesn't get restarted. With this patch it does.
To avoid restarting when it is not possible to do work, we call into the
personality to check that a reshape is ok, and strengthen raid5_check_reshape
to fail if there are too many failed devices.
We also break some code out into a separate function: remove_and_add_spares as
the indent level for that code was getting crazy.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The mddev and queue might be used for another array which does not set these,
so they need to be cleared.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
md tries to warn the user if they e.g. create a raid1 using two partitions of
the same device, as this does not provide true redundancy.
However it also warns if a raid0 is created like this, and there is nothing
wrong with that.
At the place where the warning is currently printer, we don't necessarily know
what level the array will be, so move the warning from the point where the
device is added to the point where the array is started.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Use kernel_fpu_begin() and kernel_fpu_end()
- Use boot_cpu_has() for feature testing even in userspace
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There are two errors that can lead to recovery problems with raid10
when used in 'far' more (not the default).
Due to a '>' instead of '>=' the wrong block is located which would result in
garbage being written to some random location, quite possible outside the
range of the device, causing the newly reconstructed device to fail.
The device size calculation had some rounding errors (it didn't round when it
should) and so recovery would go a few blocks too far which would again cause
a write to a random block address and probably a device error.
The code for working with device sizes was fairly confused and spread out, so
this has been tided up a bit.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If register_blkdev() or alloc-disk fail in mm_init() after
pci_register_driver() succeeds, then mm_pci_driver is not unregistered
properly:
Cc: Philip Guo <pg@cs.stanford.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
shmem_{nopage,mmap} are no longer used in ipc/shm.c
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
shm_nopage() can become static.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
CONFIG_ALIGNMENT_TRAP is never set on arm26.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When removing set_native_irq I missed the fact that it was
called in a couple of places that were compiled even when
SMP support is disabled. And since the irq_desc[].affinity
field only exists in SMP things broke.
Thanks to Simon Arlott <simon@arlott.org> for spotting this.
There are a couple of ways to fix this but the simplest one
is to just remove the assignments. The affinity field is only
used to display a value to the user, and nothing on either i386
or x86_64 reads it or depends on it being any particlua value,
so skipping the assignment is safe. The assignment that
is being removed is just for the initial affinity value before
the user explicitly sets it. The irq_desc array initializes
this field to CPU_MASK_ALL so the field is initialized to
a reasonable value in the SMP case without being set.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Too many changes for comfort since -rc1. Some missed merges, and some
just annoyingly big fixes since. This is not how an -rc2 should look.
Need to really calm things down!
When the PCI controller OBP node lacks an interrupt-map
and interrupt-map-mask property, we need to form the
INO by hand. The PCI swizzle logic was not doing that
properly.
This was a regression added by the of_device code.
Signed-off-by: David S. Miller <davem@davemloft.net>
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (52 commits)
netxen: do_rom_fast_write error handling
natsemi: Fix detection of vanilla natsemi cards
net: remove a collection of unneeded #undef REALLY_SLOW_IO stuff
chelsio: Fix non-NAPI compile
cxgb3 - Feed Rx free list with pages
cxgb3 - Recovery from HW starvation of response queue entries.
cxgb3 - Unmap offload packets when they are freed
cxgb3 - FW version update
cxgb3 - private ioctl cleanup
cxgb3 - manage sysfs attributes per port
S2IO: Restoring the mac address in s2io_reset
S2IO: Avoid printing the Enhanced statistics for Xframe I card.
S2IO: Making LED off during LINK_DOWN notification.
S2IO: Added a loadable parameter to enable or disable vlan stripping in frame.
S2IO: Optimized the delay to wait for command completion
S2IO: Fixes for MSI and MSIX
qla3xxx: Bumping driver version number
qla3xxx: Kernic Panic on pSeries under stress conditions
qla3xxx: bugfix tx reset after stress conditions.
qla3xxx: Check return code from pci_map_single() in ql_release_to_lrg_buf_free_list(), ql_populate_free_queue(), ql_alloc_large_buffers(), and ql3xxx_send()
...
Compiler warning spots real error!
The function do_rom_fast_read called in do_rom_fast_write can fail
and leave data1 unset. This causes a compile warning.
The correct thing is to propagate the error out.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This patch removes the MAINTAINERS entry for the removed jffs
filesystem.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Bob Tracy <rct@gherkin.frus.com> reported that the addition of support
for Aculab E1/T1 cPCI carrier cards broke detection of vanilla natsemi
cards. This patch fixes that: the problem is that the driver-specific
ta in the PCI device table is an index into a second table and this
had not been updated for the vanilla cards.
This patch fixes the problem minimally.
Signed-Off-By: Mark Brown <broonie@sirena.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Chelsio without NAPI enabled has been broken (won't compile) since
3de00b89 ("chelsio: NAPI speed improvement"):
drivers/net/chelsio/sge.c: In function `t1_interrupt`:
drivers/net/chelsio/sge.c:1716: error: `Q` undeclared (first use in this function)
The change below seems to add back in the declaration and
initialization of `Q` that was removed by mistake, and at least makes
the driver compile for me, although I have no hardware and hence no
way to test whether this actually works.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Improve the traffic recovery after the HW ran out of response queue entries.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Offload packets may be DMAed long after their SGE Tx descriptors are done
so they must remain mapped until they are freed rather than until their
descriptors are freed. Unmap such packets through an skb destructor.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
sysfs attributes are now managed per port, no longer per adapter.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
- Restore in s2io_reset, the mac address assigned during s2io_open.
Earlier, it was getting overwritten to the factory default (read from the
eeprom) and subsequently dropping received frames.
- Fixed the typo in calling rtnl_unlock in s2io_set_link function.
Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
- Enhanced Statistics are supported only for Xframe II (Herculas) card. Add
condition check such Enhanced statistics will included only in the case of
Xframe II card.
Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
- Turning off LED for LINK_DOWN notification
- Return from rxd_owner_bit_reset function if call to set_rxd_buffer_pointer
fails with ENOMEM
Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
- Added code to not to strip vlan tag when driver is in promiscuous mode
- Added module loadable parameter 'vlan_tag_strip" through which user can
enable or disable vlan stripping irrespective of mode
( promiscuous or non-promiscuous ).
Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
- Optimized delay to wait for command completion so as to reduce the
initialization wait time.
- Disable differentiated services steering. By default RMAC is configured to
steer traffic with certain DS codes to other queues. Driver must initialize
the DS memory to 0 to make sure that DS steering will not be used by default.
Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
- Added debug statements to print a debug message if the MSI/MSI-X vector (or)
data is zero.
- This patch removes the code that will enable NAPI for the case of single
ring and MSI-X / MSI case. There are some issue in the enabling NAPI with
MSI/MSI-X. So we are turning off NAPI in the case of MSI/MSI-X.
Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
To reproduce this panic consistently, we run an intensive network
application like 'netperf'. After waiting for a couple of seconds,
you will see a stack trace and a kernel panic where we are calling
pci_unmap_single() in ql_poll().
Changes:
1) Check the flags on the Response MAC IO Control block to check for
errors
2) Ensure that if we are on the 4022 we only use one segment
3) Before, we were reading the memory mapped producer index register
everytime we iterated in the loop when clearing the queue. We should
only be iterating to a known point, not as the producer index
is being updated.
Signed-off-by: Benjamin Li <benjamin.li@qlogic.com>
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
To Reproduce the Problem:
To reproduce this panic consistently, we run an intensive network
application like 'netperf' and then switch to a different console.
After waiting for a couple of seconds, you will see a tx reset has occured.
Reason:
We enable interrupts even if we were not running.
Solution:
Now we will enable interrupts only after we are ready to give up the poll
routine.
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
pci_map_single() could fail. We need to properly check the return
code from pci_map_single(). If we can not properly map this address,
then we should cleanup and return the proper return code.
Signed-off-by: Benjamin Li <benjamin.li@qlogic.com>
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
The scatter/gather lists were not being build correctly. When
large frames spanned several buffers the chip would panic.
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This change removes use of constants for rx buffer queue size
and instead calculates the queue length based on what he MTU
is set to.
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This network device driver shares the same hardware as the qla4xxx
iSCSI driver. Changing the MTU via the device interface will
cause qla4xxx to crash as there is no way to make notification.
Users wishing to change the MTU must do so using an iSCSI
utility such as Qlogic SanSurfer. This forces the user to
unload/reload this network device driver after the MTU
value has been changed in flash.
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
1) Fix deadlock issue when in QL_RESET_ACTIVE state and traversing
through the Link State Machine
2) Fix deadlock issue when ethtool would call ql_get_settings()
3) Fix deadlock issue when adaptor is ifup'ed but adaptor fails to initialize
Signed-off-by: Benjamin Li <benjamin.li@qlogic.com>
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
