- 12 Dec, 2005 20 commits
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Keshavamurthy Anil S authored
When registering multiple kprobes at the same address, we leave a small window where the kprobe hlist will not contain a reference to the registered kprobe, leading to potentially, a system crash if the breakpoint is hit on another processor. Patch below now automically relpace the old kprobe with the new kprobe from the hash list. Signed-off-by:
Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Acked-by:
Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Ingo Molnar authored
Add list_replace_rcu: replace old entry by new one. Signed-off-by:
Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Matt Helsley authored
This adds a timestamp field to the events sent via the process event connector. The timestamp allows listeners to accurately account the duration(s) between a process' events and offers strong means with which to determine the order of events with respect to a given task while also avoiding the addition of per-task data. This alters the size and layout of the event structure and hence would break compatibility if process events connector as it stands in 2.6.15-rc2 were released as a mainline kernel. Signed-off-by:
Matt Helsley <matthltc@us.ibm.com> Signed-off-by:
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Matt Helsley authored
There are several functions that might seem appropriate for a timestamp: get_cycles() current_kernel_time() do_gettimeofday() <read jiffies/jiffies_64> Each has problems with combinations of SMP-safety, low resolution, and monotonicity. This patch adds a new function that returns a monotonic SMP-safe timestamp with nanosecond resolution where available. Changes: Split timestamp into separate patch Moved to kernel/time.c Renamed to getnstimestamp Fixed unintended-pointer-arithmetic bug Signed-off-by:
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Daniel Drake authored
Commit f549d6c1 introduced a generic fallback for security xattrs, but appears to include a subtle bug. Gentoo users with kernels with selinux compiled in, and coreutils compiled with acl support, noticed that they could not copy files on tmpfs using 'cp'. cp (compiled with acl support) copies the file, lists the extended attributes on the old file, copies them all to the new file, and then exits. However the listxattr() calls were failing with this odd behaviour: llistxattr("a.out", (nil), 0) = 17 llistxattr("a.out", 0x7fffff8c6cb0, 17) = -1 ERANGE (Numerical result out of range) I believe this is a simple problem in the logic used to check the buffer sizes; if the user sends a buffer the exact size of the data, then its ok :) This change solves the problem. More info can be found at http://bugs.gentoo.org/113138Signed-off-by:
Daniel Drake <dsd@gentoo.org> Acked-by:
James Morris <jmorris@namei.org> Acked-by:
Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by:
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Srivatsa Vaddagiri authored
Accessing nohz_cpu_mask before incrementing rcp->cur is racy. It can cause tickless idle CPUs to be included in rsp->cpumask, which will extend graceperiods unnecessarily. Fix this race. It has been tested using extensions to RCU torture module that forces various CPUs to become idle. Signed-off-by:
Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Dipankar Sarma <dipankar@in.ibm.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by:
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Srivatsa Vaddagiri authored
While doing some test of RCU torture module, I hit a OOPS in rcu_do_batch, which was trying to processes callback of a module that was just removed. This is because we weren't waiting long enough for all callbacks to fire. Signed-off-by:
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Dipankar Sarma authored
This introduces a new interface - rcu_barrier() which waits until all the RCUs queued until this call have been completed. Reiser4 needs this, because we do more than just freeing memory object in our RCU callback: we also remove it from the list hanging off super-block. This means, that before freeing reiser4-specific portion of super-block (during umount) we have to wait until all pending RCU callbacks are executed. The only change of reiser4 made to the original patch, is exporting of rcu_barrier(). Cc: Hans Reiser <reiser@namesys.com> Cc: Vladimir V. Saveliev <vs@namesys.com> Signed-off-by:
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Andreas Gruenbacher authored
Reported by Jacques de Mer and Daniel Drake <dsd@gentoo.org>. Signed-off-by:
Andreas Gruenbacher <agruen@suse.de> Signed-off-by:
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Andreas Schwab authored
Sam Ravnborg <sam@ravnborg.org> writes: > Author: Uwe Zeisberger <zeisberg@informatik.uni-freiburg.de> > > [PATCH] kbuild: make kernelrelease in unconfigured kernel prints an error > > Do not include .config for target kernelrelease This is wrong. KERNELRELEASE depends on CONFIG_LOCALVERSION, thus you need .config. Signed-off-by:
Andreas Schwab <schwab@suse.de> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Shaohua Li authored
With CPU hotplug enabled, NMI watchdog stoped working. It appears the violation is the cpu_online check in nmi handler. local ACPI based NMI watchdog is initialized before we set CPU online for APs. It's quite possible a NMI is fired before we set CPU online, and that's what happens here. Signed-off-by:
Shaohua Li <shaohua.li@intel.com> Acked-by:
Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by:
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Mao, Bibo authored
When a Kprobes are inserted/removed on a modules, the modules must be ref counted so as not to allow to unload while probes are registered on that module. Without this patch, the probed module is free to unload, and when the probing module unregister the probe, the kpobes code while trying to replace the original instruction might crash. Signed-off-by:
Mao Bibo <bibo.mao@intel.com> Signed-off-by:
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Andrew Morton authored
SetPageDirty() and ClearPageDirty() are low-level thing which filesystems shouldn't be using. They bypass dirty page accounting. Cc: David Woodhouse <dwmw2@infradead.org> Acked-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Linus Torvalds authored
The VM layer (for historical reasons) turns a read-only shared mmap into a private-like mapping with the VM_MAYWRITE bit clear. Thus checking just VM_SHARED isn't actually sufficient. So use a trivial helper function for the cases where we wanted to inquire if a mapping was COW-like or not. Moo! Signed-off-by: -
Linus Torvalds authored
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Linus Torvalds authored
With the previous commit, we can handle arbitrary shared re-mappings even without this complexity, and since the only known private mappings are for strange users of /dev/mem (which never create an incomplete one), there seems to be no reason to support it. Signed-off-by: -
Linus Torvalds authored
A shared mapping doesn't cause COW-pages, so we don't need to worry about the whole vm_pgoff logic to decide if a PFN-remapped page has gone through COW or not. This makes it possible to entirely avoid the special "partial remapping" logic for the common case. Signed-off-by: -
Johannes Berg authored
ppc32 kernel, when built with CONFIG_SMP and booted on a single CPU machine, will not properly set smp_tb_synchronized, thus causing gettimeofday() to not use the HW timebase and to be limited to jiffy resolution. This, among others, causes unacceptable pauses when launching X.org. Signed-Off-By:
Johannes Berg <johannes@sipsolutions.net> Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Benjamin Herrenschmidt authored
The code that sets the clock spreading feature of the Intrepid ASIC must not be run on some machine models or those won't boot. This fixes it. Signed-off-by:
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- 09 Dec, 2005 5 commits
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Kazunori MIYAZAWA authored
It is a simple bug which uses the wrong member. This bug does not seriously affect ordinary use of IPsec. But it is important to pass IPv6 ready logo phase-2 conformance test of IPsec SGW. Signed-off-by:
Kazunori MIYAZAWA <miyazawa@linux-ipv6.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David Gibson authored
On ppc64, when opening a new hugepage region, we need to make sure any old normal-page SLBs for the area are flushed on all CPUs. There was a bug in this logic - after putting the new hugepage area masks into the thread structure, we copied it into the paca (read by the SLB miss handler) only on one CPU, not on all. This could cause incorrect SLB entries to be loaded when a multithreaded program was running simultaneously on several CPUs. This patch corrects the error, copying the context information into the PACA on all CPUs using the mm in question before flushing any existing SLB entries. Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Signed-off-by:
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David Gibson authored
On most powerpc CPUs, the dcache and icache are not coherent so between writing and executing a page, the caches must be flushed. Userspace programs assume pages given to them by the kernel are icache clean, so we must do this flush between the kernel clearing a page and it being mapped into userspace for execute. We were not doing this for hugepages, this patch corrects the situation. We use the same lazy mechanism as we use for normal pages, delaying the flush until userspace actually attempts to execute from the page in question. Tested on G5. Signed-off-by:
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Olof Johansson authored
Cache info is setup by walking the device tree in initialize_cache_info(). However, icache_flush_range might be called before that, in slb_initialize()->patch_slb_encoding, which modifies the load immediate instructions used with SLB fault code. Not only that, but depending on memory layout, we might take SLB faults during unflatten_device_tree. So that fault will load an SLB entry that might not contain the right LLP flags for the segment. Either we can walk the flattened device tree to setup cache info, or we can pick the known defaults that are known to work. Doing it in the flattened device tree is hairier since we need to know the machine type to know what property to look for, etc, etc. For now, it's just easier to go with the defaults. Worst thing that happens from it is that we might waste a few cycles doing too small dcbst/icbi increments. Signed-off-by:
Olof Johansson <olof@lixom.net> Signed-off-by:
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Michal Ostrowski authored
model_id fields of wf_smu_sys_all_params should match the model ID they are supposed to represent (as commented). Fixes windfarm on some iMac 8,1 models. Signed-off-by: Michal Ostrowski <mostrows at watson ibm com> Acked-by:
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- 08 Dec, 2005 4 commits
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Stephen Hemminger authored
The problem I was seeing turned out to be that skb->dev is NULL when the checksum is being completed in user context. This happens because the reference to the device is dropped (to allow it to be released when packets are in the queue). Because skb->dev was NULL, the netdev_rx_csum_fault was panicing on deref of dev->name. How about this? Signed-off-by:
Stephen Hemminger <shemminger@osdl.org> Signed-off-by:
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Benjamin Herrenschmidt authored
Some debug code wasn't properly removed from the initial 64k pages patch, and while it's harmless, it's also slowing down significantly a very hot code path, thus it should really be removed. Signed-off-by:
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Benjamin Herrenschmidt authored
The 64k pages patch changed the meaning of one argument passed to the low level hash functions (from "large" it became "psize" or page size index), but one of the call sites wasn't properly updated, causing potential random weird problems with huge pages. This fixes it. Signed-off-by:
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Mike Kravetz authored
This bug exists in the current code and prevents machines from booting with numa enabled if there is a node that does not contain memory. Workaround is to boot with 'numa=off'. Looks like a simple typo. Signed-off-by:
Mike Kravetz <kravetz@us.ibm.com> Signed-off-by:
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- 07 Dec, 2005 5 commits
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Stephen Hemminger authored
[ Move assosciated code comment to the correct spot, and update driver version and release date -DaveM ] Signed-off-by:
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David S. Miller authored
So we can properly use __GFP_COMP and avoid the use of PG_reserved pages. With extremely helpful review from Hugh Dickins. Signed-off-by: -
David S. Miller authored
We have to store the congestion control timestamp on the SKB before we clone it, not after. Else we get no timestamping information at all. tcp_transmit_skb() has been reworked so that we can do the timestamp still in one spot, instead of at all the call sites. Problem discovered, and initial fix, from Tom Young <tyo@ee.unimelb.edu.au>. Signed-off-by: -
Thomas Young authored
Remove unneeded call to tcp_vegas_rtt_calc. The more accurate microsecond value has already been registered prior to calling tcp_vegas_cong_avoid. Signed-off-by:
Thomas Young <tyo@ee.mu.oz.au> Signed-off-by:
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Thomas Young authored
Move the resetting of rtt measurements to inside the once per RTT block of code. Signed-off-by:
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- 05 Dec, 2005 6 commits
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Steven Whitehouse authored
The patch (originally from Steve) simply adds memory buffer settings to DECnet similar to those in TCP. Signed-off-by:
Patrick Caulfield <patrick@tykepenguin.com> Signed-off-by:
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Martin Waitz authored
When a function takes a function pointer as argument it should use the 'return (*pointer)(params...)' syntax used everywhere else in the kernel as this is recognized by kernel-doc. Signed-off-by:
Martin Waitz <tali@admingilde.org> Signed-off-by:
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Patrick McHardy authored
Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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Patrick McHardy authored
NFA_NEST calls NFA_PUT which jumps to nfattr_failure if the skb has no room left. We call read_unlock_bh at nfattr_failure for the NFA_PUT inside the locked section, so move NFA_NEST inside the locked section too. Signed-off-by:
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Patrick McHardy authored
Noticed by Pablo Neira <pablo@eurodev.net>. Signed-off-by:
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Patrick McHardy authored
Should have been marked EXPERIMENTAL from the beginning, as the current bunch of fixes show. Signed-off-by:
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