- 14 Jul, 2008 33 commits
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Felix Beck authored
The ap poll mechanism is converted to use a high-resolution timer for polling. This allows more specific polling. With this a new sysfs attribute is introduced to specify the polling rate in nanoseconds. Signed-off-by:
Felix Beck <felix.beck@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com>
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Peter Oberparleiter authored
Fix a number of sclp_vt220 cleanup problems: * fix list_empty check after list_del() * mark init-only flag as __initdata * remove implicit dependency between slab_available() and num_pages * straighten multiple init handling (use init count) Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
The idle notifier chain consists of at most one element. So there's no point in having a notifier chain. Remove it and directly call the function. Signed-off-by:
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Cornelia Huck authored
This patch adds a driver for subchannels of type chsc. A device /dev/chsc is created which may be used to issue ioctls to: - obtain information about the machine's I/O configuration - dynamically change the machine's I/O configuration via asynchronous chsc commands Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Peter Oberparleiter authored
Do not send CHP_ONLINE/CHP_OFFLINE events to subchannel drivers when a channel-path configure request failed. Signed-off-by:
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Cornelia Huck authored
css_device_id exists, so use it for determining the right driver (and add a match_flags which is always 1 for valid types). Signed-off-by:
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Cornelia Huck authored
Passing the affected chpid in chp_event() worked only by chance since chpid is the first element in res_acc_data. Make it work properly by generalizing res_acc_data as chp_link and always passing around a properly filled out chp_link structure in chp_event(). Signed-off-by:
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Cornelia Huck authored
Use the new isc registration functions for all places that need an I/O interruption subclass. Signed-off-by:
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Sebastian Ott authored
This interface makes it easy for drivers to register usage of different I/O interruption subclasses without needing to worry about possible other users of the same isc. Signed-off-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
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Cornelia Huck authored
Enhance the adapter interruption API so that device drivers can register a handler for a specific interruption subclass. This will allow different device drivers to move to differently prioritized subclasses in order to avoid congestion. Signed-off-by:
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Cornelia Huck authored
Replace the numeric values for I/O interruption subclass usage with abstract definitions and collect them all in asm/isc.h. This gives us a better overview of which iscs are actually used and makes it possible to better spread out isc usage in the future. Signed-off-by:
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Cornelia Huck authored
Checking for the validity of the css_*_characteristics is superfluous since they stay 0 for non-successful scsc. Signed-off-by:
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Martin Schwidefsky authored
Add support for clock synchronization with the server time protocol. Signed-off-by:
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Heiko Carstens authored
In case the initrd is located within the bss section it will be overwritten when the section is cleared. To prevent this just move the initrd right behind the bss section if it starts within the section. The current code already moves the initrd if the bootmem allocator bitmap would overwrite it. With this patch we should be safe against initrd corruptions. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
Add the user_regset definitions for normal and compat processes, replace the dump_regs core dump cruft with the generic CORE_DUMP_USER_REGSET and replace binfmt_elf32.c with the generic compat_binfmt_elf.c implementation. Signed-off-by:
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Sebastian Ott authored
Remove unnecessary ccw device locking inside ccw_device_oper_notify. Signed-off-by:
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Peter Oberparleiter authored
Provide functions which can be used to incrementally construct fcx enabled I/O control blocks. Signed-off-by:
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Peter Oberparleiter authored
Provide functions for assembling and starting fcx enabled I/O request blocks. Signed-off-by:
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Peter Oberparleiter authored
Extend the scsw data structure to the format required by fcx. Also provide helper functions for easier access to fields which are present in both the traditional as well as the modified format. Signed-off-by:
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Peter Oberparleiter authored
Introduce fcx bit to chsc characteristics. Signed-off-by:
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Cornelia Huck authored
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Cornelia Huck authored
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Cornelia Huck authored
Eliminate the need for the machine check handler to call into the common I/O layer directly by introducing an interface to register handlers for crws per rsc. Signed-off-by:
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Cornelia Huck authored
Rework the css driver methods to provide sane callbacks for subchannels of all types. As a bonus, this cleans up and simplyfies the machine check handling for I/O subchannels a lot. Signed-off-by:
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Cornelia Huck authored
Add modalias and subchannel type attributes for all subchannels. I/O subchannel specific attributes are now created in io_subchannel_probe(). modalias and subchannel type are also added to the uevent for the css bus. Also make the css modalias known. Signed-off-by:
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Cornelia Huck authored
Register all valid subchannels, not only I/O subchannels. Move I/O subchannel specific initialization to io_subchannel_probe(). Signed-off-by:
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Heiko Carstens authored
Using the ipldelay kernel parameter leads to a crash at IPL time. Since this is broken since a long time it looks like nobody is using it anymore. So remove it instead of fixing it. Signed-off-by:
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Heiko Carstens authored
smp_rescan_cpus() calls get_online_cpus() from a multithreaded workqueue context. This may deadlock. This is the same bug as in arch/s390/kernel/topology.c. This patch can be reverted as soon as Oleg's patch gets merged. Signed-off-by:
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Gerald Schaefer authored
Avoid compile error by using EXPORT_SYMBOL_GPL(si_swapinfo) only if CONFIG_SWAP is set. Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
In case the supported sclp facilities change the new mask should be saved. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Ursula Braun authored
If qdio shutdown runs in parallel with a channel error, the qdio_timeout_handler might not be triggered. In this case neither state INACTIVE nor state ERR is reached and the following wait_event hangs forever. Solution: do not make use of ccw_device_set_timeout(), but add a timeout to the following wait_event. And make sure, wake_up is called in case of an i/o error on the qdio-device. Signed-off-by:
Ursula Braun <braunu@de.ibm.com> Signed-off-by:
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Michael Ernst authored
Mutex locks are used to avoid problems when /sys/firmware/cpi data are accessed to in parallel. Signed-off-by:
Michael Ernst <mernst@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
Fallout from the console isc 7 -> 1 change. Signed-off-by:
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- 13 Jul, 2008 6 commits
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Linus Torvalds authored
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Li Zefan authored
# cat devices.list c 1:3 r # echo 'c 1:3 w' > sub/devices.allow # cat sub/devices.list c 1:3 w As illustrated, the parent group has no write permission to /dev/null, so it's child should not be allowed to add this write permission. Signed-off-by:
Li Zefan <lizf@cn.fujitsu.com> Acked-by:
Serge Hallyn <serue@us.ibm.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Li Zefan authored
# echo "b $((0x7fffffff)):$((0x80000000)) rwm" > devices.allow # cat devices.list b 214748364:-21474836 rwm though a major/minor number of 0x800000000 is meaningless, we should not cast it to a negative value. Signed-off-by:
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Jiri Pirko authored
Signed-off-by:
Jiri Pirko <jpirko@redhat.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Linus Torvalds authored
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: cpusets, hotplug, scheduler: fix scheduler domain breakage
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Dmitry Adamushko authored
Commit f18f982a ("sched: CPU hotplug events must not destroy scheduler domains created by the cpusets") introduced a hotplug-related problem as described below: Upon CPU_DOWN_PREPARE, update_sched_domains() -> detach_destroy_domains(&cpu_online_map) does the following: /* * Force a reinitialization of the sched domains hierarchy. The domains * and groups cannot be updated in place without racing with the balancing * code, so we temporarily attach all running cpus to the NULL domain * which will prevent rebalancing while the sched domains are recalculated. */ The sched-domains should be rebuilt when a CPU_DOWN ops. has been completed, effectively either upon CPU_DEAD{_FROZEN} (upon success) or CPU_DOWN_FAILED{_FROZEN} (upon failure -- restore the things to their initial state). That's what update_sched_domains() also does but only for !CPUSETS case. With f18f982a, sched-domains' reinitialization is delegated to CPUSETS code: cpuset_handle_cpuhp() -> common_cpu_mem_hotplug_unplug() -> rebuild_sched_domains() Being called for CPU_UP_PREPARE and if its callback is called after update_sched_domains()), it just negates all the work done by update_sched_domains() -- i.e. a soon-to-be-offline cpu is included in the sched-domains and that makes it visible for the load-balancer while the CPU_DOWN ops. is in progress. __migrate_live_tasks() moves the tasks off a 'dead' cpu (it's already "offline" when this function is called). try_to_wake_up() is called for one of these tasks from another CPU -> the load-balancer (wake_idle()) picks up a "dead" CPU and places the task on it. Then e.g. BUG_ON(rq->nr_running) detects this a bit later -> oops. Signed-off-by:
Dmitry Adamushko <dmitry.adamushko@gmail.com> Tested-by:
Vegard Nossum <vegard.nossum@gmail.com> Cc: Paul Menage <menage@google.com> Cc: Max Krasnyansky <maxk@qualcomm.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: miaox@cn.fujitsu.com Cc: rostedt@goodmis.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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- 12 Jul, 2008 1 commit
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Linus Torvalds authored
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: fix ldt limit for 64 bit
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