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Christoph Lameter 8fce4d8e3b [PATCH] slab: Node rotor for freeing alien caches and remote per cpu pages. ... The cache reaper currently tries to free all alien caches and all remote per cpu pages in each pass of cache_reap. For a machines with large number of nodes (such as Altix) this may lead to sporadic delays of around ~10ms. Interrupts are disabled while reclaiming creating unacceptable delays. This patch changes that behavior by adding a per cpu reap_node variable. Instead of attempting to free all caches, we free only one alien cache and the per cpu pages from one remote node. That reduces the time spend in cache_reap. However, doing so will lengthen the time it takes to completely drain all remote per cpu pagesets and all alien caches. The time needed will grow with the number of nodes in the system. All caches are drained when they overflow their respective capacity. So the drawback here is only that a bit of memory may be wasted for awhile longer. Details: 1. Rename drain_remote_pages to drain_node_pages to allow the specification of the node to drain of pcp pages. 2. Add additional functions init_reap_node, next_reap_node for NUMA that manage a per cpu reap_node counter. 3. Add a reap_alien function that reaps only from the current reap_node. For us this seems to be a critical issue. Holdoffs of an average of ~7ms cause some HPC benchmarks to slow down significantly. F.e. NAS parallel slows down dramatically. NAS parallel has a 12-16 seconds runtime w/o rotor compared to 5.8 secs with the rotor patches. It gets down to 5.05 secs with the additional interrupt holdoff reductions. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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Kconfig	[PATCH] Swap Migration V5: Add CONFIG_MIGRATION for page migration support	19 years ago
Makefile	[PATCH] slob: introduce the SLOB allocator	19 years ago
bootmem.c	[PATCH] FRV: Clean up bootmem allocator's page freeing algorithm	19 years ago
fadvise.c	[PATCH] fadvise: return ESPIPE on FIFO/pipe	19 years ago
filemap.c	[PATCH] mm: migration page refcounting fix	19 years ago
filemap.h	[PATCH] xip: reduce code duplication	20 years ago
filemap_xip.c	[PATCH] replace inode_update_time with file_update_time	19 years ago
fremap.c	VM: add common helper function to create the page tables	19 years ago
highmem.c	[PATCH] gfp_t: the rest	20 years ago
hugetlb.c	[PATCH] compound page: use page[1].lru	19 years ago
internal.h	[PATCH] FRV: Clean up bootmem allocator's page freeing algorithm	19 years ago
madvise.c	[PATCH] madvise MADV_DONTFORK/MADV_DOFORK	19 years ago
memory.c	[PATCH] x86_64: Add boot option to disable randomized mappings and cleanup	19 years ago
memory_hotplug.c	[PATCH] memory hotadd: pgdat->node_present_pages fix	19 years ago
mempolicy.c	[PATCH] numa_maps-update fix	19 years ago
mempool.c	[PATCH] gfp_t: mm/* (easy parts)	20 years ago
mincore.c	[PATCH] freepgt: sys_mincore ignore FIRST_USER_PGD_NR	20 years ago
mlock.c	[PATCH] move capable() to capability.h	19 years ago
mmap.c	[PATCH] move capable() to capability.h	19 years ago
mprotect.c	[PATCH] unpaged: private write VM_RESERVED	19 years ago
mremap.c	[PATCH] move capable() to capability.h	19 years ago
msync.c	[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem	19 years ago
nommu.c	[PATCH] nommu: implement vmalloc_node()	19 years ago
oom_kill.c	[PATCH] out_of_memory() locking fix	19 years ago
page-writeback.c	[PATCH] mm: dirty_exceeded speedup	19 years ago
page_alloc.c	[PATCH] slab: Node rotor for freeing alien caches and remote per cpu pages.	19 years ago
page_io.c	[PATCH] mm: split page table lock	20 years ago
pdflush.c	[PATCH] Swap Migration V5: PF_SWAPWRITE to allow writing to swap	19 years ago
prio_tree.c	Linux-2.6.12-rc2	20 years ago
readahead.c	[PATCH] add AOP_TRUNCATED_PAGE, prepend AOP_ to WRITEPAGE_ACTIVATE	19 years ago
rmap.c	[PATCH] page_add_file_rmap(): remove BUG_ON()s	19 years ago
shmem.c	[PATCH] tmpfs: fix mount mpol nodelist parsing	19 years ago
slab.c	[PATCH] slab: Node rotor for freeing alien caches and remote per cpu pages.	19 years ago
slob.c	[PATCH] SLOB=y && SMP=y fix	19 years ago
sparse.c	[PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros	19 years ago
swap.c	[PATCH] percpu_counter_sum()	19 years ago
swap_state.c	[PATCH] Direct Migration V9: Avoid writeback / page_migrate() method	19 years ago
swapfile.c	[PATCH] Direct Migration V9: remove_from_swap() to remove swap ptes	19 years ago
thrash.c	[PATCH] temporarily disable swap token on memory pressure	19 years ago
tiny-shmem.c	[PATCH] do_truncate() call fix in tiny-shmem.c	19 years ago
truncate.c	[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem	19 years ago
util.c	[PATCH] slob: introduce mm/util.c for shared functions	19 years ago
vmalloc.c	[PATCH] kernel-doc: fix warnings in vmalloc.c	20 years ago
vmscan.c	[PATCH] vmscan: no zone_reclaim if PF_MALLOC is set	19 years ago