The patch titled
Subject: ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix
has been added to the -mm tree. Its filename is
ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix
clean up docs, fix deferrable_timer_store() error handling
Cc: Chintan Pandya <cpandya@xxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: John Stultz <john.stultz@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/vm/ksm.txt | 12 ++++++------
mm/ksm.c | 9 +++++----
2 files changed, 11 insertions(+), 10 deletions(-)
diff -puN Documentation/vm/ksm.txt~ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix Documentation/vm/ksm.txt
--- a/Documentation/vm/ksm.txt~ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix
+++ a/Documentation/vm/ksm.txt
@@ -88,12 +88,12 @@ pages_unshared - how many pages unique
pages_volatile - how many pages changing too fast to be placed in a tree
full_scans - how many times all mergeable areas have been scanned
deferrable_timer - whether to use deferrable timers or not
- e.g. "echo 1 > /sys/kernel/mm/ksm/deferrable_timer"
- Default: 0 (means, we are not using deferrable timers. Users
- might want to set deferrable_timer option if they donot want
- ksm thread to wakeup CPU to carryout ksm activities thus
- gaining on battery while compromising slightly on memory
- that could have been saved.)
+ e.g. "echo 1 > /sys/kernel/mm/ksm/deferrable_timer"
+ Default: 0 (means, we are not using deferrable timers. Users
+ might want to set deferrable_timer option if they donot want
+ ksm thread to wakeup CPU to carryout ksm activities thus
+ gaining on battery while compromising slightly on memory
+ that could have been saved.)
A high ratio of pages_sharing to pages_shared indicates good sharing, but
a high ratio of pages_unshared to pages_sharing indicates wasted effort.
diff -puN mm/ksm.c~ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix mm/ksm.c
--- a/mm/ksm.c~ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix
+++ a/mm/ksm.c
@@ -2202,10 +2202,11 @@ static ssize_t deferrable_timer_store(st
int err;
err = kstrtoul(buf, 10, &enable);
-
- if (enable == 0 || enable == 1)
- use_deferrable_timer = enable;
-
+ if (err < 0)
+ return err;
+ if (enable >= 1)
+ return -EINVAL;
+ use_deferrable_timer = enable;
return count;
}
KSM_ATTR(deferrable_timer);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
maintainers-akpm-maintenance.patch
mm-debugfs-move-rounddown_pow_of_two-out-from-do_fault-path-fix.patch
mm-fix-filemapc-pagecache_get_page-kernel-doc-warnings-fix-checkpatch-fixes.patch
input-route-kbd-leds-through-the-generic-leds-layer.patch
kbuild-explain-stack-protector-strong-config-logic.patch
ocfs2-free-inode-when-i_count-becomes-zero-checkpatch-fixes.patch
mm.patch
slub-use-new-node-functions-checkpatch-fixes.patch
slab-use-get_node-and-kmem_cache_node-functions-fix-2.patch
slab-use-get_node-and-kmem_cache_node-functions-fix-2-fix.patch
slab-change-int-to-size_t-for-representing-allocation-size.patch
mm-page_allocc-unexport-alloc_pages_exact_nid.patch
dma-cma-support-arbitrary-bitmap-granularity-fix.patch
mm-vmallocc-add-a-schedule-point-to-vmalloc-fix.patch
include-linux-mmdebugh-add-vm_warn_once.patch
mm-catch-memory-commitment-underflow-fix.patch
mm-hugetlb-generalize-writes-to-nr_hugepages-fix.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
mm-compactionc-isolate_freepages_block-small-tuneup.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
list-fix-order-of-arguments-for-hlist_add_after_rcu-checkpatch-fixes.patch
add-lib-globc-fix.patch
lib-list_sortc-convert-to-pr_foo.patch
lib-list_sortc-convert-to-pr_foo-fix.patch
checkpatch-add-test-for-commit-id-formatting-style-in-commit-log.patch
binfmt_elfc-use-get_random_int-to-fix-entropy-depleting-fix.patch
rtc-add-pcf85063-support-fix.patch
fs-isofs-logging-clean-up-fix.patch
proc-remove-proc_tty_ldisc-variable-fix.patch
mmap_vmcore-skip-non-ram-pages-reported-by-hypervisors-v4-fix-fix.patch
panic-add-taint_softlockup-fix.patch
linux-next.patch
linux-next-rejects.patch
drivers-gpio-gpio-zevioc-fix-build.patch
kernel-posix-timersc-code-clean-up-checkpatch-fixes.patch
kexec-implementation-of-new-syscall-kexec_file_load-checkpatch-fixes.patch
kexec-support-kexec-kdump-on-efi-systems-fix.patch
ksm-provide-support-to-use-deferrable-timers-for-scanner-thread-fix.patch
mm-replace-remap_file_pages-syscall-with-emulation-fix.patch
debugging-keep-track-of-page-owners.patch
journal_add_journal_head-debug.patch
journal_add_journal_head-debug-fix.patch
kernel-forkc-export-kernel_thread-to-modules.patch
mutex-subsystem-synchro-test-module.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
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