- 07 Nov, 2005 40 commits
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Benjamin Herrenschmidt authored
This patch fixes nvifiafb mode setting code to be closer to what the X driver does, which actually makes it work on the 5200FX I have access to. It also fix the routine that gets the EDID from Open Firmware on PPC, it was broken in various ways and would crash at boot. Compared to the patch I posted to linux-fbdev last week, this one just changes a printk to be closer to the other ones in the driver. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Antonino A. Daplas" <adaplas@hotpop.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Randy Dunlap authored
Arrange frame buffer menu: - puts all Epson drivers together - removes split of FB_PXA and FB_PXA_PARAMETERS by FB_W100 - results in PXA, W100, Epson, S3C2410, & Virtual FB drivers being presented at the same menu level as all other FB drivers Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Acked-by:
"Antonino A. Daplas" <adaplas@pol.net> Signed-off-by:
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Randy.Dunlap authored
Frame buffer driver help text changes: - Move S3 Trio next to S3 Savage; - add or clarify help text for several FB drivers; - add help text for FB console; - add help text for bootup logos; Acked-by:
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NeilBrown authored
If an RPC socket is serving multiple programs, then the pg_authenticate of the first program in the list is called, instead of pg_authenticate for the program to be run. This does not cause a problem with any programs in the current kernel, but could confuse future code. Also set pg_authenticate for nfsd_acl_program incase it ever gets used. Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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NeilBrown authored
There are a couple of tests which could possibly be confused by extremely large numbers appearing in 'xdr' packets. I think the closest to an exploit you could get would be writing random data from a free page into a file - i.e. leak data out of kernel space. I'm fairly sure they cannot be used for remote compromise. Signed-off-by:
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NeilBrown authored
Provide a file in the NFSD filesystem that allows setting and querying of which version of NFS are being exported. Changes are only allowed while no server is running. Signed-off-by:
Steve Dickson <steved@redhat.com> Signed-off-by:
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NeilBrown authored
Most files in the nfsd filesystems are transaction files. You write a request, and read a response. For some (e.g. 'threads') it makes sense to just be able to read and get the current value. This functionality did exist but was broken recently when someone modified nfsctl.c without going through the maintainer. This patch fixes the regression. Signed-off-by:
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NeilBrown authored
This is a somewhat cosmetic fix to keep the SpecFS validation test from complaining. SpecFS want's to try chmod on symlinks, and ext3 and reiser (at least) return ENOTSUPP. Probably both sides are being silly, but it is easiest to simply make it a non-issue and filter out chmod requests on symlinks at the nfsd level. Signed-off-by:
Olaf Kirch <okir@suse.de> Signed-off-by:
J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by:
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Ronald S. Bultje authored
Fix the warning "Debug: sleeping function called from invalid context at include/asm/semaphore.h:102" that the zr36067 driver emits every time an application using JPEG capture starts up (e.g. mjpegtools' lavrec). The warning is harmless, but clogs up the dmesg output. This was logged as bugzilla #5403. (Thanks to Christian Casteyde for helping me in fixing this long-standing annoyance.) Signed-off-by:
Ronald S. Bultje <rbultje@ronald.bitfreak.net> Signed-off-by:
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Martin Bachem authored
- cleanup source - remove nonfunctional code parts Signed-off-by:
Karsten Keil <kkeil@suse.de> Signed-off-by:
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Matt Porter authored
Updates the RIO messaging interface to pass a device instance into the event registeration and callbacks. Signed-off-by:
Matt Porter <mporter@kernel.crashing.org> Signed-off-by:
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Matt Porter authored
Adds PPC32 RIO support. Init code for the MPC85xx RIO ports and glue for the STx GP3 board to use it. Signed-off-by:
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Matt Porter authored
Addresses issues raised with the 2.6.12-rc6-mm1 RIO support. Fix dma_mask init, shrink some code, general cleanup. Signed-off-by:
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Matt Porter authored
Adds RapidIO enumeration/discovery. The core code implements enumeration/discovery, management of devices/resources, and interfaces for RIO drivers. Signed-off-by:
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Matt Porter authored
Add RapidIO core include files. The core code implements enumeration/discovery, management of devices/resources, and interfaces for RIO drivers. Signed-off-by:
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Matt Porter authored
Adds a RapidIO subsystem to the kernel. RIO is a switched fabric interconnect used in higher-end embedded applications. The curious can look at the specs over at http://www.rapidio.org The core code implements enumeration/discovery, management of devices/resources, and interfaces for RIO drivers. There's a lot more to do to take advantages of all the hardware features. However, this should provide a good base for folks with RIO hardware to start contributing. Signed-off-by:
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Ananth N Mavinakayanahalli authored
Reorganize the preempt_disable/enable calls to eliminate the extra preempt depth. Changes based on Paul McKenney's review suggestions for the kprobes RCU changeset. Signed-off-by:
Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by:
Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by:
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Ananth N Mavinakayanahalli authored
Changes to the arch kprobes infrastructure to take advantage of the locking changes introduced by usage of RCU for synchronization. All handlers are now run without any locks held, so they have to be re-entrant or provide their own synchronization. Signed-off-by:
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Ananth N Mavinakayanahalli authored
Changes to the base kprobes infrastructure to use RCU for synchronization during kprobe registration and unregistration. These changes coupled with the arch kprobe changes (next in series): a. serialize registration and unregistration of kprobes. b. enable lockless execution of handlers. Handlers can now run in parallel. Signed-off-by:
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Ananth N Mavinakayanahalli authored
x86_64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using a arch specific kprobe control block. Signed-off-by:
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Ananth N Mavinakayanahalli authored
Sparc64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using an arch specific kprobe control block. Signed-off-by:
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Ananth N Mavinakayanahalli authored
PPC64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using an arch specific kprobe control block. Signed-off-by:
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Ananth N Mavinakayanahalli authored
IA64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using an arch specific kprobe control block. Signed-off-by:
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Ananth N Mavinakayanahalli authored
I386 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu, using an arch specific kprobe control block. Signed-off-by:
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Ananth N Mavinakayanahalli authored
Changes to the base kprobe infrastructure to track kprobe execution on a per-cpu basis. Signed-off-by:
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Ananth N Mavinakayanahalli authored
The following set of patches are aimed at improving kprobes scalability. We currently serialize kprobe registration, unregistration and handler execution using a single spinlock - kprobe_lock. With these changes, kprobe handlers can run without any locks held. It also allows for simultaneous kprobe handler executions on different processors as we now track kprobe execution on a per processor basis. It is now necessary that the handlers be re-entrant since handlers can run concurrently on multiple processors. All changes have been tested on i386, ia64, ppc64 and x86_64, while sparc64 has been compile tested only. The patches can be viewed as 3 logical chunks: patch 1: Reorder preempt_(dis/en)able calls patches 2-7: Introduce per_cpu data areas to track kprobe execution patches 8-9: Use RCU to synchronize kprobe (un)registration and handler execution. Thanks to Maneesh Soni, James Keniston and Anil Keshavamurthy for their review and suggestions. Thanks again to Anil, Hien Nguyen and Kevin Stafford for testing the patches. This patch: Reorder preempt_disable/enable() calls in arch kprobes files in preparation to introduce locking changes. No functional changes introduced by this patch. Signed-off-by:
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Corey Minyard authored
If a panic came from the IPMI watchdog pretimeout and that was reported via an NMI, it would also be reported via the standard IPMI flags, which would get picked up when reporting panic events and cause another panic. This adds an atomic to avoid calling panic twice. Signed-off-by:
Corey Minyard <cminyard@mvista.com> Signed-off-by:
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Corey Minyard authored
Use rcu_read_lock for the cmd_rcvrs list, since that was what what intended, anyway. This means that all the users of the cmd_rcvrs_lock are tasks, so the irq disables are no longer required for that lock and it can become a semaphore. Signed-off-by:
Corey Minyard <minyard@acm.org> Acked-by:
"Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by:
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Matt Domsch authored
Convert ipmi driver thread to kthread API, only sleep when interface is idle. Signed-off-by:
Matt Domsch <Matt_Domsch@dell.com> Cc: Corey Minyard <minyard@acm.org> Signed-off-by:
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Corey Minyard authored
We must poll for responses to commands when interrupts aren't in use. The default poll interval is based on using a kernel timer, which varies with HZ. For character-based interfaces like KCS and SMIC though, that can be way too slow (>15 minutes to flash a new firmware with KCS, >20 seconds to retrieve the sensor list). This creates a low-priority kernel thread to poll more often. If the state machine is idle, so is the kernel thread. But if there's an active command, it polls quite rapidly. This decrease a firmware flash time from 15 minutes to 1.5 minutes, and the sensor list time to 4.5 seconds, on a Dell PowerEdge x8x system. The timer-based polling remains, to ensure some amount of responsiveness even under high user process CPU load. Checking for a stopped timer at rmmod now uses atomics and del_timer_sync() to ensure safe stoppage. Signed-off-by:
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Corey Minyard authored
BMCs can get into ERROR0 state while flashing new firmware, particularly while the BMC is erasing the next flash block, which may take a just under 2 seconds on a Dell PowerEdge 2800 (1.75 seconds typical), during which time the single-threaded firmware may not be able to process new commands. In particular, clearing OBF may not take effect immediately. We want it to delay in ERROR0 after clearing OBF a bit waiting for OBF to actually be clear before proceeding. This introduces a new return value from the LLDD's event loop, SI_SM_CALL_WITH_TICK_DELAY. This means the calling thread/timer should schedule_timeout() at least 1 tick, rather than busy-wait. This is a longer delay than SI_SM_CALL_WITH_DELAY, which is typically a 250us busy-wait. Signed-off-by:
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Corey Minyard authored
The current BT retry/reset mechanism fails to succeed on a PowerEdge 1650, when the controller is wedged with B2H_ATN asserted at XACTION_START. If this occurs, no further commands will ever succeed unless the state of the controller is first cleared out. Furthermore, the soft reset would only occur if the first command after insmod was the one that timed out, not if a later command timed out. This patch changes the retry/reset mechanism to be as follows: Before retrying a command, clear the state of the BT controller such that the flags represent ready for a new transaction. This increases the chance of success of the restarted transaction. After 2 retries, issue a soft reset and retry one more time before giving up and reporting back a failure. Signed-off-by:
Rocky Craig <rocky.craig@hp.com> Signed-off-by:
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Corey Minyard authored
Some commands, on some system BMCs, don't respond at at all. This is seen on Dell PowerEdge x6xx and x7xx systems with IPMI 1.0 BT controllers when a "Get SDR" command is issued, with a length field of 0x3A, which happens to be the length of about SDR entries. If another length is passed, this command succeeds. This patch adds general infrastructure for receiving commands before they're passed down to the low-level drivers, such that they can be completed immediately, or modified, prior to being sent to ->start_transaction(). Signed-off-by:
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Corey Minyard authored
Make SMIC driver ignore EVT_AVAIL and SMS_ATN bits in flags register, as they're used by systems management interrupts, not the host OS. Make the OEM0 Data Available handler work for pre-IPMI 1.5 systems from Dell too. Without these two fixes, PowerEdge 2650 and other similar systems with SMIC may hang a process (modprobe or anything using /dev/ipmi0). Signed-off-by:
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Corey Minyard authored
Make module_param and MODULE_PARAM_DESC agree on poweroff_powercycle name. There was an extraneous ifdef in the IPMI poweroff code that prevented it from working if PROC_FS was disabled. Signed-off-by:
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Corey Minyard authored
Modify the IPMI watchdog parameters (the ones that make sense) to be exported from sysfs. This is somewhat complicated because these parameters have side-effects that must be handled. Signed-off-by:
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Corey Minyard authored
A number of small changes for the various system interface drivers, consolidated from a number of patches from Matt Domsch. Clear B2H_ATN and drain the BMC message buffer on command timeout. This prevents further commands from failing after a timeout. Add bt_debug and smic_debug module parameters, expose them in sysfs. This lets you enable and disable debugging messages at runtime. Unsigned jiffies math in ipmi_si_intf.c causes a too-large value to be passed to ->event() after jiffies wrap-around. The BT driver had caught this, but didn't know how to fix it. Now all calls to ->event() use a sane value for time. Increase timeout for commands handed to the BT driver from 2 seconds to 5 seconds. This is necessary particularly when the previous command was a "Clear SEL", as that command completes, yet the BMC isn't really ready to handle another command yet. Silence BT debugging messages which were being printed on the console. Increase SMIC timeout form 1/10s to 2s. This is needed on Dell PowerEdge 2650 and PowerEdge 750 with ERA/O cards to allow commands to complete without timing out. Adds kcs_debug module param, to match behavior of BT and SMIC. This also prevents messages from being sent to the console unless explicitly requested. Signed-off-by:
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Corey Minyard authored
This patch is rather large, but it really can't be done in smaller chunks easily and I believe it is an important change. This has been out and tested for a while in the latest IPMI driver release. There are no functional changes, just changes as necessary to convert the locking over (and a few minor style updates). The IPMI driver uses read/write locks to ensure that things exist while they are in use. This is bad from a number of points of view. This patch removes the rwlocks and uses refcounts and RCU lists to manage what the locks did. Signed-off-by:
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Nick Piggin authored
Introduce the notion of cooperating processes (those that submit requests close to one another), and use these statistics to make better choices about whether or not to do anticipatory waiting. Help and analysis from Seetharami Seelam <seelam@cs.utep.edu> Performance testing from Seelam: I set up my system and executed a couple of tests that I used for OLS. I tested with AS, cooperative process patch merged in -mm tree (which I called Nick, below) and the cooperative patch with modifications to as_update_iohist (which I called Seelam). I used a dual-processor (2.28GHz Pentium 4 Xeon) system, with 1 GB main memory and 1 MB L2 cache, running Linux 2.6.9. Only a single processor is used for the experiments. I used 7.2K RPM Maxtor 10GB drive configured with ext2 file system. Experiment 1 (ex1) consists of reading one Linux source trees using find . -type f -exec cat '{}' ';' > /dev/null. Experiment 2 (ex2) consists of reading two disjoint Linux source trees using find . -type f -exec cat '{}' ';' > /dev/null. Experiment 3 (ex3) consists of streaming read of a 2GB file in the background and 1 instance of the chunk reads in Experiment 1. Timings for reading the Linux source are shown below: AS Nick Seelam ex1: 0m25.813s 0m27.859s 0m27.640s ex2: 1m11.468s 1m13.918s 1m5.869s ex3: 81m44.352s 10m38.572s 6m47.994s The difference between the numbers in Experiment 3 must be due to the code in as_update_iohist. (akpm: that's not part of this patch. So this patch is "Nick"). Signed-off-by:Nick Piggin <npiggin@suse.de> Signed-off-by:
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Miklos Szeredi authored
This patch passes the file handle supplied in iattr to userspace, in case the ->setattr() was invoked from sys_ftruncate(). This solves the permission checking (or lack thereof) in ftruncate() for the class of filesystems served by an unprivileged userspace process. Signed-off-by:
Miklos Szeredi <miklos@szeredi.hu> Signed-off-by:
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