- 27 Apr, 2007 34 commits
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Martin Schwidefsky authored
The page_test_and_clear_dirty primitive really consists of two operations, page_test_dirty and the page_clear_dirty. The combination of the two is not an atomic operation, so it makes more sense to have two separate operations instead of one. In addition to the improved readability of the s390 version of SetPageUptodate, it now avoids the page_test_dirty operation which is an insert-storage-key-extended (iske) instruction which is an expensive operation. Signed-off-by:Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Generate uevents for all cpus if cpu capability changes. This can happen e.g. because the cpus are overheating. The cpu capability can be read via /sys/devices/system/cpu/cpuN/capability. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com>
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Jan Glauber authored
Replace per_cpu(... , smp_processor_id()) with __get_cpu_var() Signed-off-by:
Jan Glauber <jan.glauber@de.ibm.com> Signed-off-by:
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Jan Glauber authored
Cleanup code and remove obsolete documentation. Signed-off-by:
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Stefan Haberland authored
Use only capital letters for defines. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by:
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Ursula Braun authored
Reopen of /dev/account failed. The IUCV path has to be terminated in vmlogrdr_release. Signed-off-by:
Ursula Braun <braunu@de.ibm.com> Signed-off-by:
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Peter Oberparleiter authored
Add explicit sclp initialization for those sclp users that do not register with the interface. Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Ahmed S. Darwish authored
A patch for the CTC / ESCON network driver. Switch from kmalloc to kzalloc when appropriate, remove some unnecessary kmalloc casts too. Since I have no s390 machine, I didn't compile it but I examined it carefully. Signed-off-by:
"Ahmed S. Darwish" <darwish.07@gmail.com> Cc: Frank Pavlic <fpavlic@de.ibm.com> Cc: Ursula Braun <braunu@de.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Michael Holzheu authored
s390 machines provide hardware support for creating Linux dumps on SCSI disks. For creating a dump a special purpose dump Linux is used. The first 32 MB of memory are saved by the hardware before the dump Linux is booted. Via an SCLP interface, the saved memory can be accessed from Linux. This patch exports memory and registers of the crashed Linux to userspace via a debugfs file. For more information refer to Documentation/s390/zfcpdump.txt, which is included in this patch. Signed-off-by:
Michael Holzheu <holzheu@de.ibm.com> Signed-off-by:
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Peter Oberparleiter authored
Specifying 'ipldev' in the dasd= kernel parameter will automatically activate the boot device for use by the dasd driver. Signed-off-by:
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Horst Hummel authored
This patch adds a sysfs-attribute 'status' to make the DASD device-status accessible from user-space. In addition, the DASD driver generates an uevent(CHANGE) for the ccw-device on each device-status change. This enables user-space applications (e.g. udev) to do related processing. Signed-off-by:
Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
Recent cvs versions of gcc have support for an improved stack overflow checking that calculates the size of the guard size for each function. If the compiler accepts -mstack-size without -mstack-guard then the new stack check is available. We always want to use the new stack checker. Signed-off-by:
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Heiko Carstens authored
We get this: Section mismatch: reference to .init.text:con3270_consetup from .data between 'con3270' (at offset 0x45c8) and 'con3270_fn' Section mismatch: reference to .init.text:con3215_consetup from .data between 'con3215' (at offset 0x4678) and 'raw3215_ccw_driver' Since there is no difference between a non present console setup function and one that returns only 0 remove them. Signed-off-by:
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Martin Schwidefsky authored
Simplify the signal_return function that checks for the two special system calls sigreturn and rt_sigreturn. No need to do a page table walk, a call to copy_from_user while disabled page faults will work as well. Signed-off-by:
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Martin Schwidefsky authored
The minor fault path has grown a lot in terms of cycles. In particular the kprobes hook is very costly. Optimize the path to save a couple of cycles. If kprobes is enabled more than 300 cycles can be avoided if kprobes_running() is false. Signed-off-by:
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Heiko Carstens authored
Generic bug implementation for s390. Will increase the value of the console output on BUG() statements since registers r0-r5,r14 will not be clobbered by a printk() call that was previously done before the illegal instruction of BUG() was hit. Also implements an architecture specific WARN_ON(). Output of that could be increased but requires common code change. Signed-off-by:
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Martin Schwidefsky authored
This patch adds two improvements to the oops output. First it adds an additional line after the PSW which decodes the different fields of it. Second a disassembler is added that decodes the instructions surrounding the faulting PSW. The output of a test oops now looks like this: kernel BUG at init/main.c:419 illegal operation: 0001 [#1] CPU: 0 Not tainted Process swapper (pid: 0, task: 0000000000464968, ksp: 00000000004be000) Krnl PSW : 0700000180000000 00000000000120b6 (rest_init+0x36/0x38) R:0 T:1 IO:1 EX:1 Key:0 M:0 W:0 P:0 AS:0 CC:0 PM:0 EA:3 Krnl GPRS: 0000000000000003 00000000004ba017 0000000000000022 0000000000000001 000000000003a5f6 0000000000000000 00000000004be6a8 0000000000000000 0000000000000000 00000000004b8200 0000000000003a50 0000000000008000 0000000000516368 000000000033d008 00000000000120b2 00000000004bdee0 Krnl Code: 00000000000120a6: e3e0f0980024 stg %r14,152(%r15) 00000000000120ac: c0e500014296 brasl %r14,3a5d8 00000000000120b2: a7f40001 brc 15,120b4 >00000000000120b6: 0707 bcr 0,%r7 00000000000120b8: eb7ff0500024 stmg %r7,%r15,80(%r15) 00000000000120be: c0d000195825 larl %r13,33d108 00000000000120c4: a7f13f00 tmll %r15,16128 00000000000120c8: a7840001 brc 8,120ca Call Trace: ([<00000000000120b2>] rest_init+0x32/0x38) [<00000000004be614>] start_kernel+0x37c/0x410 [<0000000000012020>] _ehead+0x20/0x80 Signed-off-by: -
Martin Schwidefsky authored
Remove system call glue for sys_clone, sys_fork, sys_vfork, sys_execve, sys_sigreturn, sys_rt_sigreturn and sys_sigaltstack. Call do_execve from kernel_execve directly, move pt_regs to the right place and branch to sysc_return to start the user space program. This removes the last in-kernel system call. Signed-off-by:
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Cornelia Huck authored
We used to unregister ccw devices not directly from the I/O subchannel remove function in order to avoid lifelocks on the css bus semaphore. This semaphore is gone, and there is no reason to not unregister the ccw device directly (it is even better since it is more in keeping with the goal of immediate disconnect). Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
We allocage two pages when channel path measurements are enabled via cm_enable. We must not forget to free them again when channel path measurements are disabled again. Signed-off-by:
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Cornelia Huck authored
Introduce a mutex for struct ccwgroup to prevent simuntaneous register/unregister on the same ccwgroup device. Signed-off-by:
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Cornelia Huck authored
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Peter Oberparleiter authored
Ensure that channel-path related subchannel data is only retrieved and used when it is valid and that it is updated when it may have changed. Signed-off-by:
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Peter Oberparleiter authored
Use a bitmap for indicating which subchannels require evaluation instead of allocating memory for each evaluation request. This approach reduces memory consumption during recovery in case of massive evaluation request occurrence and removes the need for memory allocation failure handling. Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Stefan Bader authored
Path verification triggered by changes to the available CHPIDs will be interrupted by another change but not re-started. This results in an invalid path mask. To solve this make sure to completely re-start path verification when changing the available paths. Signed-off-by:
Stefan Bader <shbader@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
Convert ccw_uevent to use add_uevent_var and adapt snprint_alias. Signed-off-by:
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Peter Oberparleiter authored
Add a new attribute to the channel-path sysfs directory through which channel-path configure operations can be triggered. Also listen for hardware events requesting channel-path configure operations and process them accordingly. Signed-off-by:
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Cornelia Huck authored
Detangle the online_store code and make it more readable. Signed-off-by:
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Peter Oberparleiter authored
Check validity flag of CHPID description data before continuing with channel-path initialization. Signed-off-by:
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Peter Oberparleiter authored
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Peter Oberparleiter authored
Channel path status can now be modified by writing '0' and '1' to the sysfs status attribute in addition to 'offline' and 'online' respectively. Signed-off-by:
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Peter Oberparleiter authored
Introduce data type for channel-path IDs. Signed-off-by:
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Heiko Carstens authored
Clean interface between cio and ipl code, so Peter stops complaining. Signed-off-by:
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Heiko Carstens authored
If both sclp and diag memory detection don't work stop at the first memory hole. Otherwise the code might loop forever... Signed-off-by:
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- 26 Apr, 2007 1 commit
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Linus Torvalds authored
.. ok, enough waffling about it already. "Just do it!" Signed-off-by:Linus Torvalds <torvalds@linux-foundation.org>
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- 25 Apr, 2007 5 commits
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [PARPORT] SUNBPP: Fix OOPS when debugging is enabled. [SPARC] openprom: Switch to ref counting PCI API
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [NETLINK]: Infinite recursion in netlink.
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Andrew Morton authored
The packet driver is assuming (reasonably) that the (undocumented) request.errors is an errno. But it is in fact some mysterious bitfield. When things go wrong we return weird positive numbers to the VFS as pointers and it goes oops. Thanks to William Heimbigner for reporting and diagnosis. (It doesn't oops, but this driver still doesn't work for William) Cc: William Heimbigner <icxcnika@mar.tar.cc> Cc: Peter Osterlund <petero2@telia.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by:
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Alexey Kuznetsov authored
Reply to NETLINK_FIB_LOOKUP messages were misrouted back to kernel, which resulted in infinite recursion and stack overflow. The bug is present in all kernel versions since the feature appeared. The patch also makes some minimal cleanup: 1. Return something consistent (-ENOENT) when fib table is missing 2. Do not crash when queue is empty (does not happen, but yet) 3. Put result of lookup Signed-off-by:
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jens Axboe authored
There's a really rare and obscure bug in CFQ, that causes a crash in cfq_dispatch_insert() due to rq == NULL. One example of the resulting oops is seen here: http://lkml.org/lkml/2007/4/15/41 Neil correctly diagnosed the situation for how this can happen: if two concurrent requests with the exact same sector number (due to direct IO or aliasing between MD and the raw device access), the alias handling will add the request to the sortlist, but next_rq remains NULL. Read the more complete analysis at: http://lkml.org/lkml/2007/4/25/57 This looks like it requires md to trigger, even though it should potentially be possible to due with O_DIRECT (at least if you edit the kernel and doctor some of the unplug calls). The fix is to move the ->next_rq update to when we add a request to the rbtree. Then we remove the possibility for a request to exist in the rbtree code, but not have ->next_rq correctly updated. Signed-off-by:
Jens Axboe <jens.axboe@oracle.com> Signed-off-by:
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