- 26 Jan, 2008 40 commits
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Stefan Haberland authored
Add time to the 'expires' value to avoid a loop caused by the cqr termination function Signed-off-by:
Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Martin Schwidefsky authored
Remove extern declaration of non-existent last_task_used_math and remove unused field error_code from the thread_struct. Signed-off-by: -
WANG Cong authored
This patch removes TOPDIR from arch/s390/kernel/Makefile. Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by:
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Stefan Weinhuber authored
Parallel access volumes (PAV) is a storage server feature, that allows to start multiple channel programs on the same DASD in parallel. It defines alias devices which can be used as alternative paths to the same disk. With the old base PAV support we only needed rudimentary functionality in the DASD device driver. As the mapping between base and alias devices was static, we just had to export an identifier (uid) and could leave the combining of devices to external layers like a device mapper multipath. Now hyper PAV removes the requirement to dedicate alias devices to specific base devices. Instead each alias devices can be combined with multiple base device on a per request basis. This requires full support by the DASD device driver as now each channel program itself has to identify the target base device. The changes to the dasd device driver and the ECKD discipline are: - Separate subchannel device representation (dasd_device) from block device representation (dasd_block). Only base devices are block devices. - Gather information about base and alias devices and possible combinations. - For each request decide which dasd_device should be used (base or alias) and build specific channel program. - Support summary unit checks, which allow the storage server to upgrade / downgrade between base and hyper PAV at runtime (support is mandatory). Signed-off-by:
Stefan Weinhuber <wein@de.ibm.com> Signed-off-by:
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Roland McGrath authored
Signed-off-by:
Roland McGrath <roland@redhat.com> Signed-off-by:
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Martin Schwidefsky authored
Move the NOTES and BUG_TABLE section in the linker script to the read-only sections right after the text section. Signed-off-by: -
Joe Perches authored
Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Joe Perches authored
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Joe Perches authored
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Michael Holzheu authored
This patch fixes a problem with the following scenario: 1. Linux booted from DASD "A" 2. Reboot from DASD "B" using "/sys/firmware/reipl/ccw/device" 3. Reboot DASD "B" Without this patch in step 3 on newer s390 systems under LPAR instead of DASD "B", DASD "A" will be booted. The reason is that in step 2 we use CCW reipl and in step 3 we use DIAG308 (subcode 3) reipl. DIAG308 does not notice the CCW reipl and still thinks that it has to reboot DASD "A". Before applying this fix, ensure to have MCF RJ9967101E or z9 GA3 base driver installed. Signed-off-by:
Michael Holzheu <holzheu@de.ibm.com> Signed-off-by:
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Christian Borntraeger authored
We have seen an oops in an OOM situation, where show_mem tried to access the struct page of a dcss segment. The vmemmap code has already created the 1:1 mapping but failed allocating the struct pages. In the OOM case, show_mem now walks the memory. It uses pfn_valid to detect if it may access the struct page. In the case described above, the mapping was established and pfn_valid returned true. As the struct pages were not allocated, the kernel oopsed. We have to ensure that we have created the struct pages, before we add a mapping pointing to the pages. Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
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Michael Holzheu authored
The sclp ipl information has not been initialized. Therefore the ipl loadparm and the "has_dump" flag have not been set correctly. Signed-off-by:
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Heiko Carstens authored
No need to preallocate the per cpu lowcores and stacks. Savings are 28-32k per offline cpu. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Denis Cheng authored
single list_head variable initialized with LIST_HEAD_INIT could almost always can be replaced with LIST_HEAD declaration, this shrinks the code and looks better. Signed-off-by:
Denis Cheng <crquan@gmail.com> Signed-off-by:
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Michael Holzheu authored
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Michael Holzheu authored
In case of a kernel panic it is currently possible to specify that a dump should be created, the system should be rebooted or stopped. Virtual sysfs files under the directory /sys/firmware/ are used for that configuration. In addition to that, there are kernel parameters 'vmhalt', 'vmpoff' and 'vmpanic', which can be used to specify z/VM commands, which are automatically executed in case of halt, power off or a kernel panic. This patch combines both functionalities and allows to specify the z/VM CP commands also via sysfs attributes. In addition to that, it enhances the existing handling of shutdown triggers (e.g. halt or panic) and associated shutdown actions (e.g. dump or reipl) and makes it more flexible. Signed-off-by:
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Joe Perches authored
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Joe Perches authored
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Stefan Haberland authored
Using the return value of ccw_device_set_online as return value for dasd_generic_probe() causes the DASD to fail setting online Signed-off-by:
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Jan Glauber authored
Move s390 crypto Kconfig options to drivers/crypto/Kconfig to have all hardware crypto devices in one place. This also makes messing up the kernel source tree easier for some people. Signed-off-by:
Jan Glauber <jan.glauber@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Forgot to remove this when removing the appldata binary sysctls. Signed-off-by:
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Heiko Carstens authored
It caused only a lot of confusion. From now on cpu hotplug of up to NR_CPUS will work by default. If somebody wants to limit that then the possible_cpus parameter can be used. Signed-off-by:
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Heiko Carstens authored
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Heiko Carstens authored
Used to contain the address of the holder of the lock. But since the spinlock code is not inlined anymore all locks contain the same address anyway. And since in addtition nobody complained about that for ages its obviously unused. So remove it. Signed-off-by:
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Heiko Carstens authored
Align everything to MAX_ORDER so we can get rid of the extra checks. Signed-off-by:
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Heiko Carstens authored
Also print PREEMPT and/or SMP if the kernel was configured that way. Makes s390 look a bit more like other architectures. Signed-off-by:
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Christian Borntraeger authored
Currently the vmalloc area starts at a dynamic address depending on the memory size. There was also an 8MB security hole after the physical memory to catch out-of-bounds accesses. We can simplify the code by putting the vmalloc area explicitely at the top of the kernel mapping and setting the vmalloc size to a fixed value of 128MB/128GB for 31bit/64bit systems. Part of the vmalloc area will be used for the vmem_map. This leaves an area of 96MB/1GB for normal vmalloc allocations. Signed-off-by:
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Martin Schwidefsky authored
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Martin Schwidefsky authored
The clear-by-asce operation of the idte instruction gets an asce (address-space-control-element) as argument to specify which TLBs need to get flushed. The current code passes a plain pointer to the start of the pgd without the additional bits which would make the pointer an asce. The current machines don't mind the difference but a future model might want to use the designation type control bits in the asce as a filter for the TLBs to flush. Signed-off-by: -
Heiko Carstens authored
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Heiko Carstens authored
Add a new interface so that cpus can be put into standby state and configured state. Only offline cpus can be put into standby state or configured state. For that the new percpu sysfs attribute "configure" must be used. To put a cpu in standby state a "0" must be written to the attribute. In order to switch it into configured state a "1" must be written to the attribute. Only cpus in configured state can be brought online. In addition this patch introduces a static mapping of physical to logical cpus. As a result only the sysfs directories of present cpus will be created. To scan for new cpus the new sysfs attribute "rescan" must be used. Writing to /sys/devices/system/cpu/rescan will trigger a rescan of cpus and will create directories for new cpus. On IPL only configured cpus will be used. And on reboot/shutdown all cpus will remain in their current state (configured/standby). Signed-off-by:
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Michael Ernst authored
Signed-off-by:
Michael Ernst <mernst@de.ibm.com> Signed-off-by:
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Ursula Braun authored
Current definition of QDIO_ACTIVATE_TIMEOUT results in value 0. Thus it may cause endless wait in function qdio_activate(). Signed-off-by:
Ursula Braun <braunu@de.ibm.com> Signed-off-by:
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Sebastian Ott authored
Signed-off-by:
Sebastian Ott <sebott@de.ibm.com> Signed-off-by:
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Peter Oberparleiter authored
Add a timed recovery procedure to reactivate ccw devices in cases where HW/VM events are not sufficient to allow for proper recovery of reappearing channel paths. Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Michael Ernst authored
Allocated kernel memory for locks is not freed in case of subchannel found to be invalid. Signed-off-by:
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Cornelia Huck authored
There are two ways for a ccwgroup device to be unregistered: Via the ungroup attribute, or when on of the slave devices is killed by a machine check. As we have to unregister the ccwgroup device via a callback, we'll now have to check whether it hasn't been already unregistered because of a machine check. Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
Make sure pending timers are always deleted, even if we don't go through ccw_device_done(). Signed-off-by:
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Peter Oberparleiter authored
Minimize calls to cpu intensive function get_subchannel_by_schid() by introducing function for_each_subchannel_staged() which temporarily caches the information about registered subchannels in a bitmap. Signed-off-by:
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Cornelia Huck authored
Set the owner field in the embedded struct device_driver to the value provided in the {css,ccw,ccwgroup}_driver. Signed-off-by:
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