- 04 Dec, 2006 35 commits
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Heiko Carstens authored
The lock dependency validator adds a bunch of extra stack frames to the stack, which can cause stack overflows. Especially seen on 31 bit where the small stack is only 4k. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Cornelia Huck authored
In io_subchannel_register(), it is better to just reprobe the current device if it hasn't a driver yet than to rescan the whole bus. Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
If I/O was running on a just varied off chpid, it will be terminated. If this was a common I/O layer internal I/O, it needs to be retried. Signed-off-by:
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Cornelia Huck authored
If the last path to a device is gone after a chpid has been varied off, putting it on the slow queue doesn't prevent a device driver from still attempting to use it (it may stay on the slow queue for a long time). Instead, trigger a verify event which will prevent I/O attempts from the device driver immediately. Signed-off-by:
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Ursula Braun authored
Add some prefixes to constands defined in drivers/s390/net/qdio.h and drivers/s390/lcs.h to make it possible to include the three header files drivers/s390/net/qeth.h, drivers/s390/net/qdio.h and drivers/net/s390/lcs.h in one C file. This is required for the patch that generates the kerntypes.o file for use by lcrash. Signed-off-by:
Ursula Braun <braunu@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
VMALLOC_END on 31bit should be 0x8000000UL instead of 0x7fffffffL. The page mask which is used to make sure memory_end is on 4MB/2MB boundary is wrong and not needed. Therefore remove it. Make sure a vmalloc area does also exist and work on (future) machines with 4TB and more memory. Signed-off-by:
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Cornelia Huck authored
Using memcmp to compare ccw_dev_id implies that the whole structure (incl. padding) has always been completely initialized to sane values. Comparing the structures field by field doesn't make such assumptions. Signed-off-by:
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Heiko Carstens authored
There's no need to have a spin_lock here, but need sleepable context for vmem_map. Therefore convert the spin_lock into a mutex. Signed-off-by:
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Christian Borntraeger authored
Set KBUILD_IMAGE to a sane value. This enables "make rpm" Signed-off-by:
Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Follow i386/x86_64: lockdep can be used to print held locks when printing a backtrace. This can be useful when debugging things like 'scheduling while atomic' asserts. Signed-off-by:
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Gerald Schaefer authored
Use a wrapper for copy_to/from_user to chose the best usercopy method. The mvcos instruction is better for sizes greater than 256 bytes, if mvcos is not available a page table walk is better for sizes greater than 1024 bytes. Also removed the redundant copy_to/from_user_std_small functions. Signed-off-by:
Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Avoid the tprot loop if diag260 works and reports that there are no holes in memory. The tprot instruction can lead to a significant delay in the ipl process if the virtual guest has a lot of memory and the host is under memory pressure. Signed-off-by:
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Heiko Carstens authored
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Heiko Carstens authored
Need this at yet another file and don't want to add yet another extern... Signed-off-by:
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Heiko Carstens authored
If the memory detection code would ever reach the point where it would load the wait psw, it would generate a specification exception and the system would crash at ipl time. This is because of a misaligned wait psw. It needs to be on a double word boundary instead of a word boundary. Signed-off-by:
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Heiko Carstens authored
Let one master cpu kill all other cpus instead of sending an external interrupt to all other cpus so they can kill themselves. Simplifies reipl/shutdown functions a lot. Signed-off-by:
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Heiko Carstens authored
In case of reipl cpcmd gets called when all other cpus are not running anymore. To prevent deadlocks change __cpcmd so that it doesn't take any locks and call cpcmd or __cpcmd, whatever is correct in the current context. Signed-off-by:
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Heiko Carstens authored
KEXEC_CONTROL_MEMORY_LIMIT is an unsigned long value and therefore should be defined as one. Otherwise the kexec control page can be allocated above 2GB which will cause a specification exception on the sam31 instruction in the s390 kexec relocation code. Signed-off-by:
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Heiko Carstens authored
In case of re-IPL and diag308 doesn't work we have to reset all devices manually and wait synchronously that each reset finished. This patch adds the necessary infrastucture and the first exploiter of it. Subsystems that need to add a function that needs to be called at re-IPL may register/unregister this function via struct reset_call { struct reset_call *next; void (*fn)(void); }; void register_reset_call(struct reset_call *reset); void unregister_reset_call(struct reset_call *reset); When the registered function get called the context is: - all cpus beside the current one are stopped - all machine checks and interrupts are disabled - prefixing is disabled - a default machine check handler is available for use The registered functions may not take any locks are sleep. For the common I/O layer part of this patch: Introduce a reset_call css_reset that does the following: - clear all subchannels - perform a rchp on all channel paths and wait for the resulting machine checks This replaces the calls to clear_all_subchannels() and cio_reset_channel_paths() for kexec and ccw reipl. reipl_ccw_dev() now uses reipl_find_schid() to determine the subchannel id for a given device id. Also remove cio_reset_channel_paths() and friends since they are not needed anymore. Signed-off-by: -
Nicolas Kaiser authored
Signed-off-by:
Nicolas Kaiser <nikai@nikai.net> Signed-off-by:
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Heiko Carstens authored
segment save will exit with a lock held if the passed segment doesn't exist. Any subsequent call to segment_save will lead to a deadlock. Fix this and give up the lock before returning. Signed-off-by:
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Horst Hummel authored
Currently the return value of 'dasd_eer_enable' is returned - even if the function returned '0'. Now return 'count' for successful execution. Signed-off-by:
Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by:
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Horst Hummel authored
In case a request timed out and termination did not work, the console was flooded with retry messages (every 1/10s). Now we use a 5s delay per retry and generate a more precise message. Signed-off-by:
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Michael Holzheu authored
Since the diag 308 reipl method is superior to the ccw method, we should use it whenever it is possible. We can do that, if the user has not specified a new reipl ccw device and the system has been ipled from a ccw device. Signed-off-by:
Michael Holzheu <holzheu@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
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Martin Schwidefsky authored
Remove lock pointer from 3215 device structure. Use get_ccwdev_lock for each use of the lock in the ccw-device structure. Signed-off-by: -
Michael Holzheu authored
If reboot fails (e.g. because wrong devno has been specified by the user), we should just stop all cpus, but should not trigger a kernel panic. Signed-off-by:
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Heiko Carstens authored
Get rid of our own user_termio_to_kernel_termios() and kernel_termios_to_user_termio() macros which didn't check for errors on user space accesses. Instead use the generic functions which handle this properly. In addition the generic version of user_termio_to_kernel_termios() also copies the c_line member which was missing in our variant. Signed-off-by:
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Ralph Wuerthner authored
Signed-off-by:
Ralph Wuerthner <rwuerthn@de.ibm.com> Signed-off-by:
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Michael Holzheu authored
If multiple kernel images are installed on one DASD, the loadparm can be used to select the boot configuration. This patch introduces the following two new sysfs attributes: /sys/firmware/ipl/loadparm: shows loadparm of current system (ro) /sys/firmware/reipl/ccw/loadparm: loadparm used for next reboot (rw) Signed-off-by:
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Heiko Carstens authored
Follow other architectures and add __must_check to uaccess functions. Signed-off-by:
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Heiko Carstens authored
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Horst Hummel authored
When writing to dasd attributes (e.g. readonly), all values besides '1' are handled like '0'. Other sysfs-attributes like 'online' are checking for '1' and for '0' and do not accept other values. Therefore enhanced checking and error handling in dasd_devmap attribute store functions. Signed-off-by:
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Christian Borntraeger authored
The SALIPL entry point has an needless memory detection routine as we later check the memory size again. The SALIPL code also uses diagnose 0x060 if we are running under VM, but this diagnose is not compatible with the 64 bit addressing mode. The solution is to get rid of this code and rely on the memory detection in the startup code. Signed-off-by:
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Jeff Garzik authored
It's bitrotten, long unmaintained, long hidden under BROKEN_ON_SMP, etc. As scheduled in feature-removal-schedule.txt, and ack'd several times on lkml. Signed-off-by:Jeff Garzik <jeff@garzik.org>
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- 03 Dec, 2006 5 commits
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Jamal Hadi Salim authored
aevents can not uniquely identify an SA. We break the ABI with this patch, but consensus is that since it is not yet utilized by any (known) application then it is fine (better do it now than later). Signed-off-by:
Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yasuyuki Kozakai authored
To use ipv6_find_hdr(), IP6_NF_IPTABLES is necessary. Signed-off-by:
Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by:
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Alexey Dobriyan authored
David Binderman's icc logs: net/rose/rose_route.c(399): remark #593: variable "err" was set but never used Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Yasuyuki Kozakai authored
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Patrick McHardy authored
- move EXPORT_SYMBOL next to exported symbol - use EXPORT_SYMBOL_GPL since this is what the original code used Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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