1. 04 8月, 2011 4 次提交
  2. 27 7月, 2011 3 次提交
  3. 26 7月, 2011 1 次提交
    • D
      xen/balloon: memory hotplug support for Xen balloon driver · 080e2be7
      Daniel Kiper 提交于
      Memory hotplug support for Xen balloon driver.  It should be mentioned
      that hotplugged memory is not onlined automatically.  It should be onlined
      by user through standard sysfs interface.
      
      Memory could be hotplugged in following steps:
      
        1) dom0: xl mem-max <domU> <maxmem>
           where <maxmem> is >= requested memory size,
      
        2) dom0: xl mem-set <domU> <memory>
           where <memory> is requested memory size; alternatively memory
           could be added by writing proper value to
           /sys/devices/system/xen_memory/xen_memory0/target or
           /sys/devices/system/xen_memory/xen_memory0/target_kb on dumU,
      
        3) domU: for i in /sys/devices/system/memory/memory*/state; do \
                   [ "`cat "$i"`" = offline ] && echo online > "$i"; done
      
      Memory could be onlined automatically on domU by adding following line to
      udev rules:
      
        SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'"
      
      In that case step 3 should be omitted.
      Signed-off-by: NDaniel Kiper <dkiper@net-space.pl>
      Acked-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Cc: Ian Campbell <ian.campbell@citrix.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      080e2be7
  4. 20 7月, 2011 13 次提交
  5. 12 7月, 2011 2 次提交
  6. 09 7月, 2011 1 次提交
    • D
      xen: tmem: self-ballooning and frontswap-selfshrinking · a50777c7
      Dan Magenheimer 提交于
      This patch introduces two in-kernel drivers for Xen transcendent memory
      ("tmem") functionality that complement cleancache and frontswap.  Both
      use control theory to dynamically adjust and optimize memory utilization.
      Selfballooning controls the in-kernel Xen balloon driver, targeting a goal
      value (vm_committed_as), thus pushing less frequently used clean
      page cache pages (through the cleancache code) into Xen tmem where
      Xen can balance needs across all VMs residing on the physical machine.
      Frontswap-selfshrinking controls the number of pages in frontswap,
      driving it towards zero (effectively doing a partial swapoff) when
      in-kernel memory pressure subsides, freeing up RAM for other VMs.
      
      More detail is provided in the header comment of xen-selfballooning.c.
      Signed-off-by: NDan Magenheimer <dan.magenheimer@oracle.com>
      
      [v8: konrad.wilk@oracle.com: set default enablement depending on frontswap]
      [v7: konrad.wilk@oracle.com: fix capitalization and punctuation in comments]
      [v6: fix frontswap-selfshrinking initialization]
      [v6: konrad.wilk@oracle.com: fix init pr_infos; add comments about swap]
      [v5: konrad.wilk@oracle.com: add NULL to attr list; move inits up to decls]
      [v4: dkiper@net-space.pl: use strict_strtoul plus a few syntactic nits]
      [v3: konrad.wilk@oracle.com: fix potential divides-by-zero]
      [v3: konrad.wilk@oracle.com: add many more comments, fix nits]
      [v2: rebased to linux-3.0-rc1]
      [v2: Ian.Campbell@citrix.com: reorganize as new file (xen-selfballoon.c)]
      [v2: dkiper@net-space.pl: proper access to vm_committed_as]
      [v2: dkiper@net-space.pl: accounting fixes]
      Cc: Jan Beulich <JBeulich@novell.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Cc: <xen-devel@lists.xensource.com>
      a50777c7
  7. 01 7月, 2011 2 次提交
  8. 18 6月, 2011 1 次提交
  9. 16 6月, 2011 1 次提交
  10. 07 6月, 2011 1 次提交
    • F
      swiotlb: Export swioltb_nr_tbl and utilize it as appropiate. · 5f98ecdb
      FUJITA Tomonori 提交于
      By default the io_tlb_nslabs is set to zero, and gets set to
      whatever value is passed in via swiotlb_init_with_tbl function.
      The default value passed in is 64MB. However, if the user provides
      the 'swiotlb=<nslabs>' the default value is ignored and
      the value provided by the user is used... Except when the SWIOTLB
      is used under Xen - there the default value of 64MB is used and
      the Xen-SWIOTLB has no mechanism to get the 'io_tlb_nslabs' filled
      out by setup_io_tlb_npages functions. This patch provides a function
      for the Xen-SWIOTLB to call to see if the io_tlb_nslabs is set
      and if so use that value.
      Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
      Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      5f98ecdb
  11. 31 5月, 2011 1 次提交
  12. 27 5月, 2011 1 次提交
    • D
      xen: cleancache shim to Xen Transcendent Memory · 5bc20fc5
      Dan Magenheimer 提交于
      This patch provides a shim between the kernel-internal cleancache
      API (see Documentation/mm/cleancache.txt) and the Xen Transcendent
      Memory ABI (see http://oss.oracle.com/projects/tmem).
      
      Xen tmem provides "hypervisor RAM" as an ephemeral page-oriented
      pseudo-RAM store for cleancache pages, shared cleancache pages,
      and frontswap pages.  Tmem provides enterprise-quality concurrency,
      full save/restore and live migration support, compression
      and deduplication.
      
      A presentation showing up to 8% faster performance and up to 52%
      reduction in sectors read on a kernel compile workload, despite
      aggressive in-kernel page reclamation ("self-ballooning") can be
      found at:
      
      http://oss.oracle.com/projects/tmem/dist/documentation/presentations/TranscendentMemoryXenSummit2010.pdfSigned-off-by: NDan Magenheimer <dan.magenheimer@oracle.com>
      Reviewed-by: NJeremy Fitzhardinge <jeremy@goop.org>
      Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Cc: Matthew Wilcox <matthew@wil.cx>
      Cc: Nick Piggin <npiggin@kernel.dk>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Rik Van Riel <riel@redhat.com>
      Cc: Jan Beulich <JBeulich@novell.com>
      Cc: Chris Mason <chris.mason@oracle.com>
      Cc: Andreas Dilger <adilger@sun.com>
      Cc: Ted Ts'o <tytso@mit.edu>
      Cc: Mark Fasheh <mfasheh@suse.com>
      Cc: Joel Becker <joel.becker@oracle.com>
      Cc: Nitin Gupta <ngupta@vflare.org>
      5bc20fc5
  13. 19 5月, 2011 2 次提交
    • D
      drivers/xen/sys-hypervisor: Cleanup code/data sections definitions · 887cb456
      Daniel Kiper 提交于
      Cleanup code/data sections definitions
      accordingly to include/linux/init.h.
      Signed-off-by: NDaniel Kiper <dkiper@net-space.pl>
      Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      887cb456
    • K
      xen/p2m/m2p/gnttab: Support GNTMAP_host_map in the M2P override. · d5431d52
      Konrad Rzeszutek Wilk 提交于
      We only supported the M2P (and P2M) override only for the
      GNTMAP_contains_pte type mappings. Meaning that we grants
      operations would "contain the machine address of the PTE to update"
      If the flag is unset, then the grant operation is
      "contains a host virtual address". The latter case means that
      the Hypervisor takes care of updating our page table
      (specifically the PTE entry) with the guest's MFN. As such we should
      not try to do anything with the PTE. Previous to this patch
      we would try to clear the PTE which resulted in Xen hypervisor
      being upset with us:
      
      (XEN) mm.c:1066:d0 Attempt to implicitly unmap a granted PTE c0100000ccc59067
      (XEN) domain_crash called from mm.c:1067
      (XEN) Domain 0 (vcpu#0) crashed on cpu#3:
      (XEN) ----[ Xen-4.0-110228  x86_64  debug=y  Not tainted ]----
      
      and crashing us.
      
      This patch allows us to inhibit the PTE clearing in the PV guest
      if the GNTMAP_contains_pte is not set.
      
      On the m2p_remove_override path we provide the same parameter.
      
      Sadly in the grant-table driver we do not have a mechanism to
      tell m2p_remove_override whether to clear the PTE or not. Since
      the grant-table driver is used by user-space, we can safely assume
      that it operates only on PTE's. Hence the implementation for
      it to work on !GNTMAP_contains_pte returns -EOPNOTSUPP. In the future
      we can implement the support for this. It will require some extra
      accounting structure to keep track of the page[i], and the flag.
      
      [v1: Added documentation details, made it return -EOPNOTSUPP instead
       of trying to do a half-way implementation]
      Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      d5431d52
  14. 13 5月, 2011 1 次提交
  15. 12 5月, 2011 1 次提交
  16. 11 5月, 2011 1 次提交
    • S
      xen: do not clear and mask evtchns in __xen_evtchn_do_upcall · 7e186bdd
      Stefano Stabellini 提交于
      Change the irq handler of evtchns and pirqs that don't need EOI (pirqs
      that correspond to physical edge interrupts) to handle_edge_irq.
      
      Use handle_fasteoi_irq for pirqs that need eoi (they generally
      correspond to level triggered irqs), no risk in loosing interrupts
      because we have to EOI the irq anyway.
      
      This change has the following benefits:
      
      - it uses the very same handlers that Linux would use on native for the
      same irqs (handle_edge_irq for edge irqs and msis, and
      handle_fasteoi_irq for everything else);
      
      - it uses these handlers in the same way native code would use them: it
      let Linux mask\unmask and ack the irq when Linux want to mask\unmask
      and ack the irq;
      
      - it fixes a problem occurring when a driver calls disable_irq() in its
      handler: the old code was unconditionally unmasking the evtchn even if
      the irq is disabled when irq_eoi was called.
      
      See Documentation/DocBook/genericirq.tmpl for more informations.
      Signed-off-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
      [v1: Fixed space/tab issues]
      Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      7e186bdd
  17. 20 4月, 2011 1 次提交
  18. 19 4月, 2011 3 次提交
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