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authorRabin Vincent <rabin.vincent@axis.com>2015-07-14 07:35:11 +0200
committerJonathan Corbet <corbet@lwn.net>2015-07-24 15:05:56 +0200
commita10726bb5472ff2ed95180cfb5e82091c45d7b19 (patch)
tree083278a7720ee254099477d0defbdd799fe00c53
parentacc068d967a63aef163167a66a02966f42052b80 (diff)
downloadop-kernel-dev-a10726bb5472ff2ed95180cfb5e82091c45d7b19.zip
op-kernel-dev-a10726bb5472ff2ed95180cfb5e82091c45d7b19.tar.gz
Documentation: mm: fix location of extfrag_index
/proc/extfrag_index does not exist. This file is in debugfs. Fix the description of extfrag_threshold to reflect this. Signed-off-by: Rabin Vincent <rabin.vincent@axis.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
-rw-r--r--Documentation/sysctl/vm.txt10
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
index 9832ec5..9c3f2f8 100644
--- a/Documentation/sysctl/vm.txt
+++ b/Documentation/sysctl/vm.txt
@@ -225,11 +225,11 @@ with your system. To disable them, echo 4 (bit 3) into drop_caches.
extfrag_threshold
This parameter affects whether the kernel will compact memory or direct
-reclaim to satisfy a high-order allocation. /proc/extfrag_index shows what
-the fragmentation index for each order is in each zone in the system. Values
-tending towards 0 imply allocations would fail due to lack of memory,
-values towards 1000 imply failures are due to fragmentation and -1 implies
-that the allocation will succeed as long as watermarks are met.
+reclaim to satisfy a high-order allocation. The extfrag/extfrag_index file in
+debugfs shows what the fragmentation index for each order is in each zone in
+the system. Values tending towards 0 imply allocations would fail due to lack
+of memory, values towards 1000 imply failures are due to fragmentation and -1
+implies that the allocation will succeed as long as watermarks are met.
The kernel will not compact memory in a zone if the
fragmentation index is <= extfrag_threshold. The default value is 500.
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