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.

Hugh Dickins 6f5e6b9e69 [PATCH] fix free swap cache latency ... Lee Revell reported 28ms latency when process with lots of swapped memory exits. 2.6.15 introduced a latency regression when unmapping: in accounting the zap_work latency breaker, pte_none counted 1, pte_present PAGE_SIZE, but a swap entry counted nothing at all. We think of pages present as the slow case, but Lee's trace shows that free_swap_and_cache's radix tree lookup can make a lot of work - and we could have been doing it many thousands of times without a latency break. Move the zap_work update up to account swap entries like pages present. This does account non-linear pte_file entries, and unmap_mapping_range skipping over swap entries, by the same amount even though they're quick: but neither of those cases deserves complicating the code (and they're treated no worse than they were in 2.6.14). Signed-off-by: Hugh Dickins <hugh@veritas.com> Acked-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>		19 years ago
..
Kconfig	…
Makefile	[PATCH] slob: introduce the SLOB allocator	19 years ago
bootmem.c	…
fadvise.c	…
filemap.c	…
filemap.h	…
filemap_xip.c	…
fremap.c	…
highmem.c	[PATCH] gfp_t: the rest	19 years ago
hugetlb.c	…
internal.h	…
madvise.c	[PATCH] madvise MADV_DONTFORK/MADV_DOFORK	19 years ago
memory.c	[PATCH] fix free swap cache latency	19 years ago
memory_hotplug.c	[PATCH] memory hotadd: pgdat->node_present_pages fix	19 years ago
mempolicy.c	…
mempool.c	…
mincore.c	…
mlock.c	…
mmap.c	…
mprotect.c	[PATCH] unpaged: private write VM_RESERVED	19 years ago
mremap.c	…
msync.c	…
nommu.c	…
oom_kill.c	…
page-writeback.c	…
page_alloc.c	…
page_io.c	…
pdflush.c	…
prio_tree.c	…
readahead.c	…
rmap.c	…
shmem.c	…
slab.c	…
slob.c	…
sparse.c	…
swap.c	[PATCH] fix race in pagevec_strip?	19 years ago
swap_state.c	…
swapfile.c	…
thrash.c	…
tiny-shmem.c	…
truncate.c	…
util.c	…
vmalloc.c	[PATCH] kernel-doc: fix warnings in vmalloc.c	19 years ago
vmscan.c	…