You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

Ingo Molnar 6cb54819d7 [PATCH] remove sys_set_zone_reclaim() ... This removes sys_set_zone_reclaim() for now. While i'm sure Martin is trying to solve a real problem, we must not hard-code an incomplete and insufficient approach into a syscall, because syscalls are pretty much for eternity. I am quite strongly convinced that this syscall must not hit v2.6.13 in its current form. Firstly, the syscall lacks basic syscall design: e.g. it allows the global setting of VM policy for unprivileged users. (!) [ Imagine an Oracle installation and a SAP installation on the same NUMA box fighting over the 'optimal' setting for this flag. What will they do? Will they try to set the flag to their own preferred value every second or so? ] Secondly, it was added based on a single datapoint from Martin: http://marc.theaimsgroup.com/?l=linux-mm&m=111763597218177&w=2 where Martin characterizes the numbers the following way: ' Run-to-run variability for "make -j" is huge, so these numbers aren't terribly useful except to see that with reclaim the benchmark still finishes in a reasonable amount of time. ' in other words: the fundamental problem has likely not been solved, only a tendential move into the right direction has been observed, and a handful of numbers were picked out of a set of hugely variable results, without showing the variability data. How much variance is there run-to-run? I'd really suggest to first walk the walk and see what's needed to get stable & predictable kernel compilation numbers on that NUMA box, before adding random syscalls to tune a particular aspect of the VM ... which approach might not even matter once the whole picture has been analyzed and understood! The third, most important point is that the syscall exposes VM tuning internals in a completely unstructured way. What sense does it make to have a _GLOBAL_ per-node setting for 'should we go to another node for reclaim'? If then it might make sense to do this per-app, via numalib or so. The change is minimalistic in that it doesnt remove the syscall and the underlying infrastructure changes, only the user-visible changes. We could perhaps add a CAP_SYS_ADMIN-only sysctl for this hack, a'ka /proc/sys/vm/swappiness, but even that looks quite counterproductive when the generic approach is that we are trying to reduce the number of external factors in the VM balance picture. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		20 years ago
..
Makefile	[IA64] fix generic/up builds	20 years ago
acpi-ext.c	Linux-2.6.12-rc2	20 years ago
acpi.c	[ACPI] merge acpi-2.6.12 branch into latest Linux 2.6.13-rc...	20 years ago
asm-offsets.c	Linux-2.6.12-rc2	20 years ago
brl_emu.c	Linux-2.6.12-rc2	20 years ago
cyclone.c	Linux-2.6.12-rc2	20 years ago
domain.c	[PATCH] Dynamic sched domains: ia64 changes	20 years ago
efi.c	[PATCH] ia64 uncached alloc	20 years ago
efi_stub.S	Linux-2.6.12-rc2	20 years ago
entry.S	[PATCH] remove sys_set_zone_reclaim()	20 years ago
entry.h	[IA64] Drop spurious paren in entry.h	20 years ago
fsys.S	Auto merge with /home/aegl/GIT/linus	20 years ago
gate-data.S	Linux-2.6.12-rc2	20 years ago
gate.S	[IA64] need r29=psr *after* rsm psr.i	20 years ago
gate.lds.S	Linux-2.6.12-rc2	20 years ago
head.S	[IA64] Fix build errors for !HOTPLUG case.	20 years ago
ia64_ksyms.c	[IA64] __ia64_syscall() is no longer used anywhere in the kernel. Remove it.	20 years ago
init_task.c	Linux-2.6.12-rc2	20 years ago
iosapic.c	[IA64] assign_irq_vector() should not panic	20 years ago
irq.c	Linux-2.6.12-rc2	20 years ago
irq_ia64.c	[IA64] assign_irq_vector() should not panic	20 years ago
irq_lsapic.c	Linux-2.6.12-rc2	20 years ago
ivt.S	[IA64] Speed up lfetch.fault [NULL]	20 years ago
jprobes.S	[PATCH] Kprobes/IA64: architecture specific JProbes support	20 years ago
kprobes.c	[PATCH] kprobes: fix namespace problem and sparc64 build	20 years ago
machvec.c	Linux-2.6.12-rc2	20 years ago
mca.c	[ACPI] Evaluate CPEI Processor Override flag	20 years ago
mca_asm.S	[IA64] cpu hotplug: return offlined cpus to SAL	20 years ago
mca_drv.c	[IA64] MCA recovery improvements	20 years ago
mca_drv.h	Linux-2.6.12-rc2	20 years ago
mca_drv_asm.S	[IA64] MCA recovery improvements	20 years ago
minstate.h	[IA64] Fix stack placement when INIT hits in kernel mode.	20 years ago
module.c	[IA64] Module gp must point to valid memory	20 years ago
numa.c	[IA64] fix generic/up builds	20 years ago
pal.S	Linux-2.6.12-rc2	20 years ago
palinfo.c	Linux-2.6.12-rc2	20 years ago
patch.c	Linux-2.6.12-rc2	20 years ago
perfmon.c	[IA64] remove linux/version.h include from arch/ia64	20 years ago
perfmon_default_smpl.c	[IA64] perfmon: make pfm_sysctl a global, and other cleanup	20 years ago
perfmon_generic.h	Linux-2.6.12-rc2	20 years ago
perfmon_itanium.h	Linux-2.6.12-rc2	20 years ago
perfmon_mckinley.h	Linux-2.6.12-rc2	20 years ago
process.c	[PATCH] Don't export machine_restart, machine_halt, or machine_power_off.	20 years ago
ptrace.c	Auto merge with /home/aegl/GIT/ia64-test	20 years ago
sal.c	Linux-2.6.12-rc2	20 years ago
salinfo.c	Linux-2.6.12-rc2	20 years ago
semaphore.c	Linux-2.6.12-rc2	20 years ago
setup.c	Auto merge with /home/aegl/GIT/linus	20 years ago
sigframe.h	Linux-2.6.12-rc2	20 years ago
signal.c	[IA64] restore_sigcontext is not preempt safe	20 years ago
smp.c	[IA64] Fix another IA64 preemption problem	20 years ago
smpboot.c	[IA64] fix generic/up builds	20 years ago
sys_ia64.c	[IA64] sys_mmap doesn't follow posix.1 when parameter len=0	20 years ago
time.c	Linux-2.6.12-rc2	20 years ago
topology.c	[IA64] Fix undefined reference to can_cpei_retarget for simulator	20 years ago
traps.c	[IA64] Make ia64 die() preempt safe	20 years ago
unaligned.c	Linux-2.6.12-rc2	20 years ago
uncached.c	[PATCH] ia64 uncached alloc	20 years ago
unwind.c	[IA64] unwind.c uses wrong unat from switch_stack	20 years ago
unwind_decoder.c	Linux-2.6.12-rc2	20 years ago
unwind_i.h	Linux-2.6.12-rc2	20 years ago
vmlinux.lds.S	[PATCH] kprobes/ia64: refuse kprobe on ivt code	20 years ago