1 files changed, 0 insertions, 137 deletions

diff --git a/patches/boot_time_opt/0154-sysctl-vm-Fine-grained-cache-shrinking.patch b/patches/boot_time_opt/0154-sysctl-vm-Fine-grained-cache-shrinking.patch
deleted file mode 100644
index 64021c6..0000000
--- a/patches/boot_time_opt/0154-sysctl-vm-Fine-grained-cache-shrinking.patch
+++ /dev/null
@@ -1,137 +0,0 @@
-From 130d5d976b920aec243e0fa63273f3143660054b Mon Sep 17 00:00:00 2001
-From: Sebastien Boeuf <sebastien.boeuf@intel.com>
-Date: Mon, 23 Jan 2017 15:32:39 -0800
-Subject: [PATCH 154/154] sysctl: vm: Fine-grained cache shrinking
-
-Lots of virtual machines are let in idle state for days until they
-are terminated, and they can keep a large amount of memory in their
-cache, meaning this memory cannot be used by other processes.
-
-We tried to release this memory using existing drop_caches sysctl,
-but it led to the complete cache loss while it could have been used
-whether the idle process wakes up. Indeed, the process can't find any
-available cached data and it directly affects performances to rebuild
-it from scratch.
-
-Instead, the solution we want is based on shrinking gradually system
-cache over time. This patch adds a new sysctl shrink_caches_mb so as
-to allow userspace applications indicating the kernel it should shrink
-system cache up to the amount (in MiB) specified.
-
-There is an application called "memshrinker" which uses this new
-mechanism. It runs in the background and periodically releases a
-specified amount of cache. This amount is based on the remaining
-cache on the system, and period is computed to follow a shrinking
-model. It results in saving a lot of memory for other processes
-running on the system.
-
-Suggested-by: Arjan van de Ven <arjan.van.de.ven@intel.com>
-Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
----
- fs/drop_caches.c   | 25 +++++++++++++++++++++++++
- include/linux/mm.h |  4 ++++
- kernel/sysctl.c    |  8 ++++++++
- mm/vmscan.c        |  2 --
- 4 files changed, 37 insertions(+), 2 deletions(-)
-
-diff --git a/fs/drop_caches.c b/fs/drop_caches.c
-index 82377017130f..f8de1383498b 100644
---- a/fs/drop_caches.c
-+++ b/fs/drop_caches.c
-@@ -9,10 +9,12 @@
- #include <linux/writeback.h>
- #include <linux/sysctl.h>
- #include <linux/gfp.h>
-+#include <linux/swap.h>
- #include "internal.h"
- 
- /* A global variable is a bit ugly, but it keeps the code simple */
- int sysctl_drop_caches;
-+int sysctl_shrink_caches_mb;
- 
- static void drop_pagecache_sb(struct super_block *sb, void *unused)
- {
-@@ -68,3 +70,26 @@ int drop_caches_sysctl_handler(struct ctl_table *table, int write,
-        }
-        return 0;
- }
-+
-+int shrink_caches_sysctl_handler(struct ctl_table *table, int write,
-+       void __user *buffer, size_t *length, loff_t *ppos)
-+{
-+       int ret;
-+       unsigned long nr_to_reclaim, page_reclaimed;
-+
-+       ret = proc_dointvec_minmax(table, write, buffer, length, ppos);
-+       if (ret)
-+               return ret;
-+
-+       nr_to_reclaim = sysctl_shrink_caches_mb * (1 << 20) / PAGE_SIZE;
-+       if (write) {
-+               page_reclaimed = shrink_all_memory(nr_to_reclaim);
-+               if (page_reclaimed > 0)
-+                       lru_add_drain_all();
-+
-+               if (page_reclaimed != nr_to_reclaim)
-+                       return page_reclaimed;
-+       }
-+
-+       return 0;
-+}
-diff --git a/include/linux/mm.h b/include/linux/mm.h
-index 15e02bf3a6b3..9f9b967ad2c9 100644
---- a/include/linux/mm.h
-+++ b/include/linux/mm.h
-@@ -2457,6 +2457,10 @@ extern int kvm_ret_mem_advice;
- int kvm_madv_instant_free_sysctl_handler(struct ctl_table *table, int write,
-                                         void __user *buffer, size_t *length,
-                                         loff_t *ppos);
-+extern int sysctl_shrink_caches_mb;
-+int shrink_caches_sysctl_handler(struct ctl_table *table, int write,
-+                                void __user *buffer, size_t *length,
-+                                loff_t *ppos);
- #endif
- 
- void drop_slab(void);
-diff --git a/kernel/sysctl.c b/kernel/sysctl.c
-index 9a1611f92a2a..9b74b4f0251d 100644
---- a/kernel/sysctl.c
-+++ b/kernel/sysctl.c
-@@ -1417,6 +1417,14 @@ static struct ctl_table vm_table[] = {
-                .mode           = 0644,
-                .proc_handler   = kvm_madv_instant_free_sysctl_handler,
-        },
-+       {
-+               .procname       = "shrink_caches_mb",
-+               .data           = &sysctl_shrink_caches_mb,
-+               .maxlen         = sizeof(int),
-+               .mode           = 0644,
-+               .proc_handler   = shrink_caches_sysctl_handler,
-+               .extra1         = &one,
-+       },
- #ifdef CONFIG_COMPACTION
-        {
-                .procname       = "compact_memory",
-diff --git a/mm/vmscan.c b/mm/vmscan.c
-index eb2f0315b8c0..b16f327b0211 100644
---- a/mm/vmscan.c
-+++ b/mm/vmscan.c
-@@ -3646,7 +3646,6 @@ void wakeup_kswapd(struct zone *zone, int order, enum zone_type classzone_idx)
-        wake_up_interruptible(&pgdat->kswapd_wait);
- }
- 
--#ifdef CONFIG_HIBERNATION
- /*
-  * Try to free `nr_to_reclaim' of memory, system-wide, and return the number of
-  * freed pages.
-@@ -3686,7 +3685,6 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim)
- 
-        return nr_reclaimed;
- }
--#endif /* CONFIG_HIBERNATION */
- 
- /* It's optimal to keep kswapds on the same CPUs as their memory, but
-    not required for correctness.  So if the last cpu in a node goes
--- 
-2.15.0
-