The patch titled
readahead: kconfig option READAHEAD_SMOOTH_AGING
has been added to the -mm tree. Its filename is
readahead-state-based-method-aging-accounting-readahead-kconfig-option-readahead_smooth_aging.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: readahead: kconfig option READAHEAD_SMOOTH_AGING
From: Wu Fengguang <wfg@xxxxxxxxxxxxxxxx>
Make the kconfig option READAHEAD_SMOOTH_AGING depend on
READAHEAD_ALLOW_OVERHEADS, and turned off by default.
Signed-off-by: Wu Fengguang <wfg@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/Kconfig | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff -puN mm/Kconfig~readahead-state-based-method-aging-accounting-readahead-kconfig-option-readahead_smooth_aging mm/Kconfig
--- a/mm/Kconfig~readahead-state-based-method-aging-accounting-readahead-kconfig-option-readahead_smooth_aging
+++ a/mm/Kconfig
@@ -216,6 +216,14 @@ config DEBUG_READAHEAD
Say N for production servers.
config READAHEAD_SMOOTH_AGING
- def_bool n if NUMA
- default y if !NUMA
- depends on ADAPTIVE_READAHEAD
+ bool "Fine grained readahead aging"
+ default n
+ depends on READAHEAD_ALLOW_OVERHEADS && !NUMA
+ help
+ Enable fine grained, mooth accounting of readahead aging.
+
+ It can help servers which meet the following two conditions:
+ - have large number of concurrent readers
+ - have the danger of readahead thrashing(i.e. memory tight)
+
+ This feature is only available on non-NUMA systems.
_
Patches currently in -mm which might be from wfg@xxxxxxxxxxxxxxxx are
origin.patch
readahead-kconfig-options.patch
readahead-kconfig-option-readahead_allow_overheads.patch
radixtree-introduce-radix_tree_scan_hole.patch
mm-introduce-probe_page.patch
mm-introduce-pg_readahead.patch
readahead-add-look-ahead-support-to-__do_page_cache_readahead.patch
readahead-delay-page-release-in-do_generic_mapping_read.patch
readahead-insert-cond_resched-calls.patch
readahead-minmax_ra_pages.patch
readahead-events-accounting.patch
readahead-rescue_pages.patch
readahead-sysctl-parameters.patch
readahead-sysctl-parameters-fix.patch
readahead-min-max-sizes.patch
readahead-state-based-method-aging-accounting.patch
readahead-state-based-method-routines.patch
readahead-state-based-method-routines-no-ra_flag_eof-on-single-page-file.patch
readahead-state-based-method.patch
readahead-state-based-method-readahead-state-based-method-stand-alone-size-limit-code.patch
readahead-state-based-method-aging-accounting-readahead-kconfig-option-readahead_smooth_aging.patch
readahead-context-based-method.patch
readahead-context-based-method-apply-stream_shift-size-limits-to-contexta-method.patch
readahead-context-based-method-fix-remain-counting.patch
readahead-context-based-method-slow-start.patch
readahead-initial-method-guiding-sizes.patch
readahead-initial-method-guiding-sizes-aggressive-initial-sizes.patch
readahead-initial-method-thrashing-guard-size.patch
readahead-initial-method-expected-read-size.patch
readahead-initial-method-user-recommended-size.patch
readahead-initial-method.patch
readahead-backward-prefetching-method.patch
readahead-backward-prefetching-method-add-use-case-comment.patch
readahead-seeking-reads-method.patch
readahead-thrashing-recovery-method.patch
readahead-call-scheme.patch
readahead-call-scheme-fix-fastcall.patch
readahead-call-scheme-no-fastcall-for-readahead_cache_hit.patch
readahead-laptop-mode.patch
readahead-loop-case.patch
readahead-nfsd-case.patch
readahead-turn-on-by-default.patch
readahead-debug-radix-tree-new-functions.patch
readahead-debug-traces-showing-accessed-file-names.patch
readahead-debug-traces-showing-read-patterns.patch
readahead-remove-size-limit-on-read_ahead_kb.patch
readahead-backward-prefetching-method-fix.patch
readahead-kconfig-option-readahead_hit_feedback.patch
readahead-remove-the-size-limit-of-max_sectors_kb-on-read_ahead_kb.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
