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* [PATCH] Add printk_clock()Andrew Morton2005-09-211-1/+6
| | | | | | | | | | | | | ia64's sched_clock() accesses per-cpu data which isn't set up at boot time. Hence ia64 cannot use printk timestamping, because printk() will crash in sched_clock(). So make printk() use printk_clock(), defaulting to sched_clock(), overrideable by the architecture via attribute(weak). Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] files: fix preemption issuesDipankar Sarma2005-09-171-0/+6
| | | | | | | | | | With the new fdtable locking rules, you have to protect fdtable with either ->file_lock or rcu_read_lock/unlock(). There are some places where we aren't doing either. This patch fixes those places. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] PR_GET_DUMPABLE returns incorrect infoMichael Kerrisk2005-09-171-2/+1
| | | | | | | | | | | | | | | | | | 2.6.13 incorporated Alan Cox's patch for /proc/sys/fs/suid_dumpable (one version of this patch can be found here http://marc.theaimsgroup.com/?l=linux-kernel&m=109647550421014&w=2 ). This patch also made corresponding changes in kernel/sys.c to change the prctl() PR_SET_DUMPABLE operation so that the permitted range of 'arg2' was modified from 0..1 to 0..2. However, a corresponding change was not made for PR_GET_DUMPABLE: if the dumpable flag is non-zero, then PR_GET_DUMPABLE always returns 1, so that the caller can't determine the true setting of this flag. Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] CPU hotplug breaks wake_up_new_taskSrivatsa Vaddagiri2005-09-171-1/+2
| | | | | | | | | | | Fix a problem wherein a new-born task is added to a dead CPU. Signed-off-by: Srivatsa Vaddagiri <vatsa@in.ibm.com> Acked-by: Nick Piggin <nickpiggin@yahoo.com.au> Acked-by: Shaohua Li <shaohua.li@intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix spinlock owner debuggingIngo Molnar2005-09-131-4/+4
| | | | | | | | fix up the runqueue lock owner only if we truly did a context-switch with the runqueue lock held. Impacts ia64, mips, sparc64 and arm. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/dwmw2/audit-2.6 Linus Torvalds2005-09-132-147/+308
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| * Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.gitDavid Woodhouse2005-08-274-4/+17
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| * | [AUDIT] Allow filtering on system call success _or_ failureDavid Woodhouse2005-08-271-2/+6
| | | | | | | | | | | | Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | AUDIT: Prevent duplicate syscall rulesAmy Griffis2005-08-172-44/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following patch against audit.81 prevents duplicate syscall rules in a given filter list by walking the list on each rule add. I also removed the unused struct audit_entry in audit.c and made the static inlines in auditsc.c consistent. Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | AUDIT: Speed up audit_filter_syscall() for the non-auditable case.David Woodhouse2005-08-171-10/+12
| | | | | | | | | | | | | | | | | | | | | It was showing up fairly high on profiles even when no rules were set. Make sure the common path stays as fast as possible. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | AUDIT: Fix task refcount leak in audit_filter_syscall()David Woodhouse2005-08-171-1/+2
| | | | | | | | | | | | Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.gitDavid Woodhouse2005-08-172-22/+48
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| * \ \ Merge with /shiny/git/linux-2.6/.gitDavid Woodhouse2005-08-0912-60/+92
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| * \ \ \ Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.gitDavid Woodhouse2005-07-275-58/+85
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| * \ \ \ \ Merge with /shiny/git/linux-2.6/.gitDavid Woodhouse2005-07-191-40/+11
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| * | | | | | AUDIT: Reduce contention in audit_serial()David Woodhouse2005-07-182-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ... by generating serial numbers only if an audit context is actually _used_, rather than doing so at syscall entry even when the context isn't necessarily marked auditable. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | AUDIT: Fix livelock in audit_serial().David Woodhouse2005-07-151-11/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The tricks with atomic_t were bizarre. Just do it sensibly instead. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | AUDIT: Fix compile error in audit_filter_syscallDavid Woodhouse2005-07-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We didn't rename it to audit_tgid after all. Except once... Doh. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | AUDIT: Avoid scheduling in idle threadDavid Woodhouse2005-07-131-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we flush a pending syscall audit record due to audit_free(), we might be doing that in the context of the idle thread. So use GFP_ATOMIC Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | AUDIT: Exempt the whole auditd thread-group from auditingDavid Woodhouse2005-07-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | and not just the one thread. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | [AUDIT] Fix sparse warning about gfp_mask typeVictor Fusco2005-07-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the sparse warning "implicit cast to nocast type" Signed-off-by: Victor Fusco <victor@cetuc.puc-rio.br> Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | Merge with /shiny/git/linux-2.6/.gitDavid Woodhouse2005-07-1311-34/+103
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| * | | | | | | AUDIT: Really don't audit auditd.David Woodhouse2005-07-021-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pid in the audit context isn't always set up. Use tsk->pid when checking whether it's auditd in audit_filter_syscall(), instead of ctx->pid. Remove a band-aid which did the same elsewhere. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | AUDIT: Stop waiting for backlog after audit_panic() happensDavid Woodhouse2005-07-021-5/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We force a rate-limit on auditable events by making them wait for space on the backlog queue. However, if auditd really is AWOL then this could potentially bring the entire system to a halt, depending on the audit rules in effect. Firstly, make sure the wait time is honoured correctly -- it's the maximum time the process should wait, rather than the time to wait _each_ time round the loop. We were getting re-woken _each_ time a packet was dequeued, and the timeout was being restarted each time. Secondly, reset the wait time after audit_panic() is called. In general this will be reset to zero, to allow progress to be made. If the system is configured to _actually_ panic on audit_panic() then that will already have happened; otherwise we know that audit records are being lost anyway. These two tunables can't be exposed via AUDIT_GET and AUDIT_SET because those aren't particularly well-designed. It probably should have been done by sysctls or sysfs anyway -- one for a later patch. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.gitDavid Woodhouse2005-07-0237-907/+3049
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| * | | | | | | | AUDIT: Use KERN_NOTICE for printk of audit recordsDavid Woodhouse2005-06-241-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | They aren't errors. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Clean up user message filteringDavid Woodhouse2005-06-242-15/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't look up the task by its pid and then use the syscall filtering helper. Just implement our own filter helper which operates solely on the information in the netlink_skb_parms. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Return correct result from audit_filter_rules()David Woodhouse2005-06-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the task refcounting was added to audit_filter_rules() it became more of a problem that this function was violating the 'only one return from each function' rule. In fixing it to use a variable to store 'ret' I stupidly neglected to actually change the 'return 1;' at the end. This makes it not work very well. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: No really, we don't want to audit auditd.David Woodhouse2005-06-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Remove stray declaration of tsk from audit_receive_msg().David Woodhouse2005-06-221-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's not used any more. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Wait for backlog to clear when generating messages.David Woodhouse2005-06-222-22/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a gfp_mask to audit_log_start() and audit_log(), to reduce the amount of GFP_ATOMIC allocation -- most of it doesn't need to be GFP_ATOMIC. Also if the mask includes __GFP_WAIT, then wait up to 60 seconds for the auditd backlog to clear instead of immediately abandoning the message. The timeout should probably be made configurable, but for now it'll suffice that it only happens if auditd is actually running. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Optimise the audit-disabled case for discarding user messagesDavid Woodhouse2005-06-222-23/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also exempt USER_AVC message from being discarded to preserve existing behaviour for SE Linux. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Spawn kernel thread to list filter rules.David Woodhouse2005-06-212-9/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we have enough rules to fill the netlink buffer space, it'll deadlock because auditctl isn't ever actually going to read from the socket until we return, and we aren't going to return until it reads... so we spawn a kernel thread to spew out the list and then exit. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Report lookup flags with path/inode records.David Woodhouse2005-06-201-7/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When LOOKUP_PARENT is used, the inode which results is not the inode found at the pathname. Report the flags so that this doesn't generate misleading audit records. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Really exempt auditd from having its actions audited.David Woodhouse2005-06-201-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We were only avoiding it on syscall exit before; now stop _everything_. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Drop user-generated messages immediately while auditing disabled.David Woodhouse2005-06-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * | | | | | | | AUDIT: Allow filtering of user messagesDavid Woodhouse2005-06-192-54/+74
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Turn the field from a bitmask to an enumeration and add a list to allow filtering of messages generated by userspace. We also define a list for file system watches in anticipation of that feature. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | | | | | | | | [PATCH] use add_taint() for setting tainted bit flagsRandy Dunlap2005-09-131-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the add_taint() interface for setting tainted bit flags instead of doing it manually. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] schedule_timeout_[un]interruptible() speedupAndrew Morton2005-09-131-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These functions don't need schedule_timeout()'s barrier. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] x86-64: Some cleanup and optimization to the processor data area.Andi Kleen2005-09-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Remove unused irqrsp field - Remove pda->me - Optimize set_softirq_pending slightly Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] cpuset semaphore depth check optimizePaul Jackson2005-09-121-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Optimize the deadlock avoidance check on the global cpuset semaphore cpuset_sem. Instead of adding a depth counter to the task struct of each task, rather just two words are enough, one to store the depth and the other the current cpuset_sem holder. Thanks to Nikita Danilov for the idea. Signed-off-by: Paul Jackson <pj@sgi.com> [ We may want to change this further, but at least it's now a totally internal decision to the cpusets code ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | Mark ia64-specific MCA/INIT scheduler hooks as dangerousLinus Torvalds2005-09-121-26/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ..and only enable them for ia64. The functions are only valid when the whole system has been totally stopped and no scheduler activity is ongoing on any CPU, and interrupts are globally disabled. In other words, they aren't useful for anything else. So make sure that nobody can use them by mistake. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] MCA/INIT: scheduler hooksKeith Owens2005-09-111-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Scheduler hooks to see/change which process is deemed to be on a cpu. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | | | | | | [PATCH] kernel: fix-up schedule_timeout() usageNishanth Aravamudan2005-09-103-20/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use schedule_timeout_{,un}interruptible() instead of set_current_state()/schedule_timeout() to reduce kernel size. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] add schedule_timeout_{,un}interruptible() interfacesNishanth Aravamudan2005-09-101-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add schedule_timeout_{,un}interruptible() interfaces so that schedule_timeout() callers don't have to worry about forgetting to add the set_current_state() call beforehand. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] kernel/acct: add kerneldocRandy Dunlap2005-09-101-16/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | for kernel/acct.c: - fix typos - add kerneldoc for non-static functions Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] sched: allow the load to grow upto its cpu_powerSiddha, Suresh B2005-09-101-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't pull tasks from a group if that would cause the group's total load to drop below its total cpu_power (ie. cause the group to start going idle). Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] sched: don't kick ALB in the presence of pinned taskSiddha, Suresh B2005-09-101-1/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jack Steiner brought this issue at my OLS talk. Take a scenario where two tasks are pinned to two HT threads in a physical package. Idle packages in the system will keep kicking migration_thread on the busy package with out any success. We will run into similar scenarios in the presence of CMP/NUMA. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] sched: use cached variable in sys_sched_yield()Renaud Lienhart2005-09-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In sys_sched_yield(), we cache current->array in the "array" variable, thus there's no need to dereference "current" again later. Signed-Off-By: Renaud Lienhart <renaud.lienhart@free.fr> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | | | | [PATCH] sched: HT optimisationNick Piggin2005-09-101-6/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If an idle sibling of an HT queue encounters a busy sibling, then make higher level load balancing of the non-idle variety. Performance of multiprocessor HT systems with low numbers of tasks (generally < number of virtual CPUs) can be significantly worse than the exact same workloads when running in non-HT mode. The reason is largely due to poor scheduling behaviour. This patch improves the situation, making the performance gap far less significant on one problematic test case (tbench). Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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