mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-21 00:42:16 +00:00
03f3c43364
Fix swapin charge operation of memcg. Now, memcg has hooks to swap-out operation and checks SwapCache is really unused or not. That check depends on contents of struct page. I.e. If PageAnon(page) && page_mapped(page), the page is recoginized as still-in-use. Now, reuse_swap_page() calles delete_from_swap_cache() before establishment of any rmap. Then, in followinig sequence (Page fault with WRITE) try_charge() (charge += PAGESIZE) commit_charge() (Check page_cgroup is used or not..) reuse_swap_page() -> delete_from_swapcache() -> mem_cgroup_uncharge_swapcache() (charge -= PAGESIZE) ...... New charge is uncharged soon.... To avoid this, move commit_charge() after page_mapcount() goes up to 1. By this, try_charge() (usage += PAGESIZE) reuse_swap_page() (may usage -= PAGESIZE if PCG_USED is set) commit_charge() (If page_cgroup is not marked as PCG_USED, add new charge.) Accounting will be correct. Changelog (v2) -> (v3) - fixed invalid charge to swp_entry==0. - updated documentation. Changelog (v1) -> (v2) - fixed comment. [nishimura@mxp.nes.nec.co.jp: swap accounting leak doc fix] Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Tested-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: 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> |
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| ABI | ||
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| aoe | ||
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| x86 | ||
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| 00-INDEX | ||
| applying-patches.txt | ||
| atomic_ops.txt | ||
| basic_profiling.txt | ||
| binfmt_misc.txt | ||
| braille-console.txt | ||
| bt8xxgpio.txt | ||
| BUG-HUNTING | ||
| c2port.txt | ||
| cachetlb.txt | ||
| Changes | ||
| CodingStyle | ||
| cpu-hotplug.txt | ||
| cpu-load.txt | ||
| cpusets.txt | ||
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| credentials.txt | ||
| dcdbas.txt | ||
| debugging-modules.txt | ||
| debugging-via-ohci1394.txt | ||
| dell_rbu.txt | ||
| devices.txt | ||
| DMA-API.txt | ||
| DMA-attributes.txt | ||
| DMA-ISA-LPC.txt | ||
| DMA-mapping.txt | ||
| dontdiff | ||
| edac.txt | ||
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| exception.txt | ||
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| ftrace.txt | ||
| gpio.txt | ||
| highuid.txt | ||
| HOWTO | ||
| hw_random.txt | ||
| ics932s401 | ||
| initrd.txt | ||
| Intel-IOMMU.txt | ||
| io_ordering.txt | ||
| io-mapping.txt | ||
| IO-mapping.txt | ||
| iostats.txt | ||
| IPMI.txt | ||
| IRQ-affinity.txt | ||
| IRQ.txt | ||
| irqflags-tracing.txt | ||
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| java.txt | ||
| kernel-doc-nano-HOWTO.txt | ||
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| local_ops.txt | ||
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| logo.gif | ||
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| Makefile | ||
| ManagementStyle | ||
| markers.txt | ||
| mca.txt | ||
| md.txt | ||
| memory-barriers.txt | ||
| memory-hotplug.txt | ||
| memory.txt | ||
| mono.txt | ||
| mutex-design.txt | ||
| nmi_watchdog.txt | ||
| nommu-mmap.txt | ||
| numastat.txt | ||
| oops-tracing.txt | ||
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| pi-futex.txt | ||
| pnp.txt | ||
| preempt-locking.txt | ||
| printk-formats.txt | ||
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| rfkill.txt | ||
| robust-futex-ABI.txt | ||
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| rt-mutex-design.txt | ||
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| rtc.txt | ||
| SAK.txt | ||
| SecurityBugs | ||
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| sparse.txt | ||
| spinlocks.txt | ||
| stable_api_nonsense.txt | ||
| stable_kernel_rules.txt | ||
| SubmitChecklist | ||
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| svga.txt | ||
| sysfs-rules.txt | ||
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| unaligned-memory-access.txt | ||
| unicode.txt | ||
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| VGA-softcursor.txt | ||
| video-output.txt | ||
| volatile-considered-harmful.txt | ||
| voyager.txt | ||
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