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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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52d4b9ac0b
Allocate all page_cgroup at boot and remove page_cgroup poitner from
struct page. This patch adds an interface as
struct page_cgroup *lookup_page_cgroup(struct page*)
All FLATMEM/DISCONTIGMEM/SPARSEMEM and MEMORY_HOTPLUG is supported.
Remove page_cgroup pointer reduces the amount of memory by
- 4 bytes per PAGE_SIZE.
- 8 bytes per PAGE_SIZE
if memory controller is disabled. (even if configured.)
On usual 8GB x86-32 server, this saves 8MB of NORMAL_ZONE memory.
On my x86-64 server with 48GB of memory, this saves 96MB of memory.
I think this reduction makes sense.
By pre-allocation, kmalloc/kfree in charge/uncharge are removed.
This means
- we're not necessary to be afraid of kmalloc faiulre.
(this can happen because of gfp_mask type.)
- we can avoid calling kmalloc/kfree.
- we can avoid allocating tons of small objects which can be fragmented.
- we can know what amount of memory will be used for this extra-lru handling.
I added printk message as
"allocated %ld bytes of page_cgroup"
"please try cgroup_disable=memory option if you don't want"
maybe enough informative for users.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
37 lines
1.3 KiB
Makefile
37 lines
1.3 KiB
Makefile
#
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# Makefile for the linux memory manager.
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#
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mmu-y := nommu.o
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mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \
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mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \
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vmalloc.o
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obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
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maccess.o page_alloc.o page-writeback.o pdflush.o \
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readahead.o swap.o truncate.o vmscan.o \
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prio_tree.o util.o mmzone.o vmstat.o backing-dev.o \
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page_isolation.o mm_init.o $(mmu-y)
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obj-$(CONFIG_PROC_PAGE_MONITOR) += pagewalk.o
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obj-$(CONFIG_BOUNCE) += bounce.o
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obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o thrash.o
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obj-$(CONFIG_HAS_DMA) += dmapool.o
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obj-$(CONFIG_HUGETLBFS) += hugetlb.o
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obj-$(CONFIG_NUMA) += mempolicy.o
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obj-$(CONFIG_SPARSEMEM) += sparse.o
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obj-$(CONFIG_SPARSEMEM_VMEMMAP) += sparse-vmemmap.o
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obj-$(CONFIG_SHMEM) += shmem.o
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obj-$(CONFIG_TMPFS_POSIX_ACL) += shmem_acl.o
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obj-$(CONFIG_TINY_SHMEM) += tiny-shmem.o
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obj-$(CONFIG_SLOB) += slob.o
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obj-$(CONFIG_MMU_NOTIFIER) += mmu_notifier.o
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obj-$(CONFIG_SLAB) += slab.o
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obj-$(CONFIG_SLUB) += slub.o
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obj-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o
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obj-$(CONFIG_FS_XIP) += filemap_xip.o
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obj-$(CONFIG_MIGRATION) += migrate.o
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obj-$(CONFIG_SMP) += allocpercpu.o
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obj-$(CONFIG_QUICKLIST) += quicklist.o
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obj-$(CONFIG_CGROUP_MEM_RES_CTLR) += memcontrol.o page_cgroup.o
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