1. 26 Jun, 2015 26 commits
  2. 25 Jun, 2015 14 commits
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · aefbef10
      Linus Torvalds authored
      Merge first patchbomb from Andrew Morton:
      
       - a few misc things
      
       - ocfs2 udpates
      
       - kernel/watchdog.c feature work (took ages to get right)
      
       - most of MM.  A few tricky bits are held up and probably won't make 4.2.
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (91 commits)
        mm: kmemleak_alloc_percpu() should follow the gfp from per_alloc()
        mm, thp: respect MPOL_PREFERRED policy with non-local node
        tmpfs: truncate prealloc blocks past i_size
        mm/memory hotplug: print the last vmemmap region at the end of hot add memory
        mm/mmap.c: optimization of do_mmap_pgoff function
        mm: kmemleak: optimise kmemleak_lock acquiring during kmemleak_scan
        mm: kmemleak: avoid deadlock on the kmemleak object insertion error path
        mm: kmemleak: do not acquire scan_mutex in kmemleak_do_cleanup()
        mm: kmemleak: fix delete_object_*() race when called on the same memory block
        mm: kmemleak: allow safe memory scanning during kmemleak disabling
        memcg: convert mem_cgroup->under_oom from atomic_t to int
        memcg: remove unused mem_cgroup->oom_wakeups
        frontswap: allow multiple backends
        x86, mirror: x86 enabling - find mirrored memory ranges
        mm/memblock: allocate boot time data structures from mirrored memory
        mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute
        mm: do not ignore mapping_gfp_mask in page cache allocation paths
        mm/cma.c: fix typos in comments
        mm/oom_kill.c: print points as unsigned int
        mm/hugetlb: handle races in alloc_huge_page and hugetlb_reserve_pages
        ...
      aefbef10
    • Linus Torvalds's avatar
      Merge tag 'please-pull-pstore' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux · 266da6f1
      Linus Torvalds authored
      Pull pstore updates from Tony Luck:
       "Miscellaneous pstore improvements"
      
      * tag 'please-pull-pstore' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
        ramoops: make it possible to change mem_type param.
        pstore/ram: verify ramoops header before saving record
        fs/pstore: Optimization function ramoops_init_przs
        fs/pstore: update the backend parameter in pstore module
        pstore: do not use message compression without lock
      266da6f1
    • Linus Torvalds's avatar
      Merge tag 'for-f2fs-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs · cfcc0ad4
      Linus Torvalds authored
      Pull f2fs updates from Jaegeuk Kim:
       "New features:
         - per-file encryption (e.g., ext4)
         - FALLOC_FL_ZERO_RANGE
         - FALLOC_FL_COLLAPSE_RANGE
         - RENAME_WHITEOUT
      
        Major enhancement/fixes:
         - recovery broken superblocks
         - enhance f2fs_trim_fs with a discard_map
         - fix a race condition on dentry block allocation
         - fix a deadlock during summary operation
         - fix a missing fiemap result
      
        .. and many minor bug fixes and clean-ups were done"
      
      * tag 'for-f2fs-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (83 commits)
        f2fs: do not trim preallocated blocks when truncating after i_size
        f2fs crypto: add alloc_bounce_page
        f2fs crypto: fix to handle errors likewise ext4
        f2fs: drop the volatile_write flag only
        f2fs: skip committing valid superblock
        f2fs: setting discard option in parse_options()
        f2fs: fix to return exact trimmed size
        f2fs: support FALLOC_FL_INSERT_RANGE
        f2fs: hide common code in f2fs_replace_block
        f2fs: disable the discard option when device doesn't support
        f2fs crypto: remove alloc_page for bounce_page
        f2fs: fix a deadlock for summary page lock vs. sentry_lock
        f2fs crypto: clean up error handling in f2fs_fname_setup_filename
        f2fs crypto: avoid f2fs_inherit_context for symlink
        f2fs crypto: do not set encryption policy for non-directory by ioctl
        f2fs crypto: allow setting encryption policy once
        f2fs crypto: check context consistent for rename2
        f2fs: avoid duplicated code by reusing f2fs_read_end_io
        f2fs crypto: use per-inode tfm structure
        f2fs: recovering broken superblock during mount
        ...
      cfcc0ad4
    • Linus Torvalds's avatar
      Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs · a7296b49
      Linus Torvalds authored
      Pull UDF fixes and cleanups from Jan Kara:
       "The contains some small fixes and improvements in error handling for
        UDF.
      
        Bundled is also one ext3 coding style fix and a fix in quota
        documentation"
      
      * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
        udf: fix udf_load_pvoldesc()
        udf: remove double err declaration in udf_file_write_iter()
        UDF: support NFSv2 export
        fs: ext3: super: fixed a space coding style issue
        quota: Update documentation
        udf: Return error from udf_find_entry()
        udf: Make udf_get_filename() return error instead of 0 length file name
        udf: bug on exotic flag in udf_get_filename()
        udf: improve error management in udf_CS0toNLS()
        udf: improve error management in udf_CS0toUTF8()
        udf: unicode: update function name in comments
        udf: remove unnecessary test in udf_build_ustr_exact()
        udf: Return -ENOMEM when allocation fails in udf_get_filename()
      a7296b49
    • Linus Torvalds's avatar
      Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6 · 1e467e68
      Linus Torvalds authored
      Pull documentation updates from Jonathan Corbet:
       "The main thing here is Ingo's big subdirectory documenting feature
        support for each architecture.  Beyond that, it's the usual pile of
        fixes, tweaks, and small additions"
      
      * tag 'docs-for-linus' of git://git.lwn.net/linux-2.6: (79 commits)
        doc:md: fix typo in md.txt.
        Documentation/mic/mpssd: don't build x86 userspace when cross compiling
        Documentation/prctl: don't build tsc tests when cross compiling
        Documentation/vDSO: don't build tests when cross compiling
        Doc:ABI/testing: Fix typo in sysfs-bus-fcoe
        Doc: Docbook: Change wikipedia's URL from http to https in scsi.tmpl
        Doc: Change wikipedia's URL from http to https
        Documentation/kernel-parameters: add missing pciserial to the earlyprintk
        Doc:pps: Fix typo in pps.txt
        kbuild : Fix documentation of INSTALL_HDR_PATH
        Documentation: filesystems: updated struct file_operations documentation in vfs.txt
        kbuild: edit explanation of clean-files variable
        Doc: ja_JP: Fix typo in HOWTO
        Move freefall program from Documentation/ to tools/
        Documentation: ARM: EXYNOS: Describe boot loaders interface
        Doc:nfc: Fix typo in nfc-hci.txt
        vfs: Minor documentation fix
        Doc: networking: txtimestamp: fix printf format warning
        Documentation, intel_pstate: Improve legacy mode internal governors description
        Documentation: extend use case for EXPORT_SYMBOL_GPL()
        ...
      1e467e68
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 14738e03
      Linus Torvalds authored
      Pull input subsystem updates from Dmitry Torokhov:
       "Thanks to Samuel Thibault input device (keyboard) LEDs are no longer
        hardwired within the input core but use LED subsystem and so allow use
        of different triggers; Hans de Goede did a large update for the ALPS
        touchpad driver; we have new TI drv2665 haptics driver and DA9063
        OnKey driver, and host of other drivers got various fixes"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (55 commits)
        Input: pixcir_i2c_ts - fix receive error
        MAINTAINERS: remove non existent input mt git tree
        Input: improve usage of gpiod API
        tty/vt/keyboard: define LED triggers for VT keyboard lock states
        tty/vt/keyboard: define LED triggers for VT LED states
        Input: export LEDs as class devices in sysfs
        Input: cyttsp4 - use swap() in cyttsp4_get_touch()
        Input: goodix - do not explicitly set evbits in input device
        Input: goodix - export id and version read from device
        Input: goodix - fix variable length array warning
        Input: goodix - fix alignment issues
        Input: add OnKey driver for DA9063 MFD part
        Input: elan_i2c - add product IDs FW names
        Input: elan_i2c - add support for multi IC type and iap format
        Input: focaltech - report finger width to userspace
        tty: remove platform_sysrq_reset_seq
        Input: synaptics_i2c - use proper boolean values
        Input: psmouse - use true instead of 1 for boolean values
        Input: cyapa - fix a few typos in comments
        Input: stmpe-ts - enforce device tree only mode
        ...
      14738e03
    • Linus Torvalds's avatar
      Merge tag 'edac_for_4.2_2' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp · 45471cd9
      Linus Torvalds authored
      Pull EDAC updates from Borislav Petkov:
      
       - New APM X-Gene SoC EDAC driver (Loc Ho)
      
       - AMD error injection module improvements (Aravind Gopalakrishnan)
      
       - Altera Arria 10 support (Thor Thayer)
      
       - misc fixes and cleanups all over the place
      
      * tag 'edac_for_4.2_2' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (28 commits)
        EDAC: Update Documentation/edac.txt
        EDAC: Fix typos in Documentation/edac.txt
        EDAC, mce_amd_inj: Set MISCV on injection
        EDAC, mce_amd_inj: Move bit preparations before the injection
        EDAC, mce_amd_inj: Cleanup and simplify README
        EDAC, altera: Do not allow suspend when EDAC is enabled
        EDAC, mce_amd_inj: Make inj_type static
        arm: socfpga: dts: Add Arria10 SDRAM EDAC DTS support
        EDAC, altera: Add Arria10 EDAC support
        EDAC, altera: Refactor for Altera CycloneV SoC
        EDAC, altera: Generalize driver to use DT Memory size
        EDAC, mce_amd_inj: Add README file
        EDAC, mce_amd_inj: Add individual permissions field to dfs_node
        EDAC, mce_amd_inj: Modify flags attribute to use string arguments
        EDAC, mce_amd_inj: Read out number of MCE banks from the hardware
        EDAC, mce_amd_inj: Use MCE_INJECT_GET macro for bank node too
        EDAC, xgene: Fix cpuid abuse
        EDAC, mpc85xx: Extend error address to 64 bit
        EDAC, mpc8xxx: Adapt for FSL SoC
        EDAC, edac_stub: Drop arch-specific include
        ...
      45471cd9
    • Linus Torvalds's avatar
      Merge tag 'pinctrl-v4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl · 93a4b1b9
      Linus Torvalds authored
      Pull pin control updates from Linus Walleij:
       "Here is the bulk of pin control changes for the v4.2 series: Quite a
        lot of new SoC subdrivers and two new main drivers this time, apart
        from that business as usual.
      
        Details:
      
        Core functionality:
         - Enable exclusive pin ownership: it is possible to flag a pin
           controller so that GPIO and other functions cannot use a single pin
           simultaneously.
      
        New drivers:
         - NXP LPC18xx System Control Unit pin controller
         - Imagination Pistachio SoC pin controller
      
        New subdrivers:
         - Freescale i.MX7d SoC
         - Intel Sunrisepoint-H PCH
         - Renesas PFC R8A7793
         - Renesas PFC R8A7794
         - Mediatek MT6397, MT8127
         - SiRF Atlas 7
         - Allwinner A33
         - Qualcomm MSM8660
         - Marvell Armada 395
         - Rockchip RK3368
      
        Cleanups:
         - A big cleanup of the Marvell MVEBU driver rectifying it to
           correspond to reality
         - Drop platform device probing from the SH PFC driver, we are now a
           DT only shop for SuperH
         - Drop obsolte multi-platform check for SH PFC
         - Various janitorial: constification, grammar etc
      
        Improvements:
         - The AT91 GPIO portions now supports the set_multiple() feature
         - Split out SPI pins on the Xilinx Zynq
         - Support DTs without specific function nodes in the i.MX driver"
      
      * tag 'pinctrl-v4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (99 commits)
        pinctrl: rockchip: add support for the rk3368
        pinctrl: rockchip: generalize perpin driver-strength setting
        pinctrl: sh-pfc: r8a7794: add SDHI pin groups
        pinctrl: sh-pfc: r8a7794: add MMCIF pin groups
        pinctrl: sh-pfc: add R8A7794 PFC support
        pinctrl: make pinctrl_register() return proper error code
        pinctrl: mvebu: armada-39x: add support for Armada 395 variant
        pinctrl: mvebu: armada-39x: add missing SATA functions
        pinctrl: mvebu: armada-39x: add missing PCIe functions
        pinctrl: mvebu: armada-38x: add ptp functions
        pinctrl: mvebu: armada-38x: add ua1 functions
        pinctrl: mvebu: armada-38x: add nand functions
        pinctrl: mvebu: armada-38x: add sata functions
        pinctrl: mvebu: armada-xp: add dram functions
        pinctrl: mvebu: armada-xp: add nand rb function
        pinctrl: mvebu: armada-xp: add spi1 function
        pinctrl: mvebu: armada-39x: normalize ref clock naming
        pinctrl: mvebu: armada-xp: rename spi to spi0
        pinctrl: mvebu: armada-370: align spi1 clock pin naming
        pinctrl: mvebu: armada-370: align VDD cpu-pd pin naming with datasheet
        ...
      93a4b1b9
    • Linus Torvalds's avatar
      Merge tag 'backlight-for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight · d59b92f9
      Linus Torvalds authored
      Pull backlight updates from Lee Jones:
       "Changes to existing drivers:
      
         - supply MODULE_DEVICE_TABLE() to ensure probing
         - constify struct; da9052_bl
         - enable compile test; lcd_l4f00242t03, lcd_lms283fg05, backlight_gpio
         - suspend/resume bugfix; lp855x_bl
         - devm_gpiod_get_optional() API fixup; pwm_bl
         - error handling fixup; backlight"
      
      * tag 'backlight-for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
        backlight: Change the return type of backlight_update_status() to int
        backlight: pwm_bl: Simplify usage of devm_gpiod_get_optional
        backlight: lp855x: Don't clear level on suspend/blank
        backlight: Allow compile test of GPIO consumers if !GPIOLIB
        video: backlight: da9052: Constify platform_device_id
        gpio-backlight: Discover driver during boot time
      d59b92f9
    • Larry Finger's avatar
      mm: kmemleak_alloc_percpu() should follow the gfp from per_alloc() · 8a8c35fa
      Larry Finger authored
      Beginning at commit d52d3997 ("ipv6: Create percpu rt6_info"), the
      following INFO splat is logged:
      
        ===============================
        [ INFO: suspicious RCU usage. ]
        4.1.0-rc7-next-20150612 #1 Not tainted
        -------------------------------
        kernel/sched/core.c:7318 Illegal context switch in RCU-bh read-side critical section!
        other info that might help us debug this:
        rcu_scheduler_active = 1, debug_locks = 0
         3 locks held by systemd/1:
         #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff815f0c8f>] rtnetlink_rcv+0x1f/0x40
         #1:  (rcu_read_lock_bh){......}, at: [<ffffffff816a34e2>] ipv6_add_addr+0x62/0x540
         #2:  (addrconf_hash_lock){+...+.}, at: [<ffffffff816a3604>] ipv6_add_addr+0x184/0x540
        stack backtrace:
        CPU: 0 PID: 1 Comm: systemd Not tainted 4.1.0-rc7-next-20150612 #1
        Hardware name: TOSHIBA TECRA A50-A/TECRA A50-A, BIOS Version 4.20   04/17/2014
        Call Trace:
          dump_stack+0x4c/0x6e
          lockdep_rcu_suspicious+0xe7/0x120
          ___might_sleep+0x1d5/0x1f0
          __might_sleep+0x4d/0x90
          kmem_cache_alloc+0x47/0x250
          create_object+0x39/0x2e0
          kmemleak_alloc_percpu+0x61/0xe0
          pcpu_alloc+0x370/0x630
      
      Additional backtrace lines are truncated.  In addition, the above splat
      is followed by several "BUG: sleeping function called from invalid
      context at mm/slub.c:1268" outputs.  As suggested by Martin KaFai Lau,
      these are the clue to the fix.  Routine kmemleak_alloc_percpu() always
      uses GFP_KERNEL for its allocations, whereas it should follow the gfp
      from its callers.
      Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Reviewed-by: default avatarKamalesh Babulal <kamalesh@linux.vnet.ibm.com>
      Acked-by: default avatarMartin KaFai Lau <kafai@fb.com>
      Signed-off-by: default avatarLarry Finger <Larry.Finger@lwfinger.net>
      Cc: Martin KaFai Lau <kafai@fb.com>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Christoph Lameter <cl@linux-foundation.org>
      Cc: <stable@vger.kernel.org>	[3.18+]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8a8c35fa
    • Vlastimil Babka's avatar
      mm, thp: respect MPOL_PREFERRED policy with non-local node · 0867a57c
      Vlastimil Babka authored
      Since commit 077fcf11 ("mm/thp: allocate transparent hugepages on
      local node"), we handle THP allocations on page fault in a special way -
      for non-interleave memory policies, the allocation is only attempted on
      the node local to the current CPU, if the policy's nodemask allows the
      node.
      
      This is motivated by the assumption that THP benefits cannot offset the
      cost of remote accesses, so it's better to fallback to base pages on the
      local node (which might still be available, while huge pages are not due
      to fragmentation) than to allocate huge pages on a remote node.
      
      The nodemask check prevents us from violating e.g.  MPOL_BIND policies
      where the local node is not among the allowed nodes.  However, the
      current implementation can still give surprising results for the
      MPOL_PREFERRED policy when the preferred node is different than the
      current CPU's local node.
      
      In such case we should honor the preferred node and not use the local
      node, which is what this patch does.  If hugepage allocation on the
      preferred node fails, we fall back to base pages and don't try other
      nodes, with the same motivation as is done for the local node hugepage
      allocations.  The patch also moves the MPOL_INTERLEAVE check around to
      simplify the hugepage specific test.
      
      The difference can be demonstrated using in-tree transhuge-stress test
      on the following 2-node machine where half memory on one node was
      occupied to show the difference.
      
      > numactl --hardware
      available: 2 nodes (0-1)
      node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 24 25 26 27 28 29 30 31 32 33 34 35
      node 0 size: 7878 MB
      node 0 free: 3623 MB
      node 1 cpus: 12 13 14 15 16 17 18 19 20 21 22 23 36 37 38 39 40 41 42 43 44 45 46 47
      node 1 size: 8045 MB
      node 1 free: 7818 MB
      node distances:
      node   0   1
        0:  10  21
        1:  21  10
      
      Before the patch:
      > numactl -p0 -C0 ./transhuge-stress
      transhuge-stress: 2.197 s/loop, 0.276 ms/page,   7249.168 MiB/s 7962 succeed,    0 failed, 1786 different pages
      
      > numactl -p0 -C12 ./transhuge-stress
      transhuge-stress: 2.962 s/loop, 0.372 ms/page,   5376.172 MiB/s 7962 succeed,    0 failed, 3873 different pages
      
      Number of successful THP allocations corresponds to free memory on node 0 in
      the first case and node 1 in the second case, i.e. -p parameter is ignored and
      cpu binding "wins".
      
      After the patch:
      > numactl -p0 -C0 ./transhuge-stress
      transhuge-stress: 2.183 s/loop, 0.274 ms/page,   7295.516 MiB/s 7962 succeed,    0 failed, 1760 different pages
      
      > numactl -p0 -C12 ./transhuge-stress
      transhuge-stress: 2.878 s/loop, 0.361 ms/page,   5533.638 MiB/s 7962 succeed,    0 failed, 1750 different pages
      
      > numactl -p1 -C0 ./transhuge-stress
      transhuge-stress: 4.628 s/loop, 0.581 ms/page,   3440.893 MiB/s 7962 succeed,    0 failed, 3918 different pages
      
      The -p parameter is respected regardless of cpu binding.
      
      > numactl -C0 ./transhuge-stress
      transhuge-stress: 2.202 s/loop, 0.277 ms/page,   7230.003 MiB/s 7962 succeed,    0 failed, 1750 different pages
      
      > numactl -C12 ./transhuge-stress
      transhuge-stress: 3.020 s/loop, 0.379 ms/page,   5273.324 MiB/s 7962 succeed,    0 failed, 3916 different pages
      
      Without -p parameter, hugepage restriction to CPU-local node works as before.
      
      Fixes: 077fcf11 ("mm/thp: allocate transparent hugepages on local node")
      Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
      Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Acked-by: default avatarDavid Rientjes <rientjes@google.com>
      Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Michal Hocko <mhocko@suse.cz>
      Cc: <stable@vger.kernel.org>	[4.0+]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0867a57c
    • Josef Bacik's avatar
      tmpfs: truncate prealloc blocks past i_size · afa2db2f
      Josef Bacik authored
      One of the rocksdb people noticed that when you do something like this
      
          fallocate(fd, FALLOC_FL_KEEP_SIZE, 0, 10M)
          pwrite(fd, buf, 5M, 0)
          ftruncate(5M)
      
      on tmpfs, the file would still take up 10M: which led to super fun
      issues because we were getting ENOSPC before we thought we should be
      getting ENOSPC.  This patch fixes the problem, and mirrors what all the
      other fs'es do (and was agreed to be the correct behaviour at LSF).
      
      I tested it locally to make sure it worked properly with the following
      
          xfs_io -f -c "falloc -k 0 10M" -c "pwrite 0 5M" -c "truncate 5M" file
      
      Without the patch we have "Blocks: 20480", with the patch we have the
      correct value of "Blocks: 10240".
      Signed-off-by: default avatarJosef Bacik <jbacik@fb.com>
      Signed-off-by: default avatarHugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      afa2db2f
    • Zhu Guihua's avatar
      mm/memory hotplug: print the last vmemmap region at the end of hot add memory · c435a390
      Zhu Guihua authored
      When hot add two nodes continuously, we found the vmemmap region info is
      a bit messed.  The last region of node 2 is printed when node 3 hot
      added, like the following:
      
        Initmem setup node 2 [mem 0x0000000000000000-0xffffffffffffffff]
         On node 2 totalpages: 0
         Built 2 zonelists in Node order, mobility grouping on.  Total pages: 16090539
         Policy zone: Normal
         init_memory_mapping: [mem 0x40000000000-0x407ffffffff]
          [mem 0x40000000000-0x407ffffffff] page 1G
          [ffffea1000000000-ffffea10001fffff] PMD -> [ffff8a077d800000-ffff8a077d9fffff] on node 2
          [ffffea1000200000-ffffea10003fffff] PMD -> [ffff8a077de00000-ffff8a077dffffff] on node 2
        ...
          [ffffea101f600000-ffffea101f9fffff] PMD -> [ffff8a074ac00000-ffff8a074affffff] on node 2
          [ffffea101fa00000-ffffea101fdfffff] PMD -> [ffff8a074a800000-ffff8a074abfffff] on node 2
        Initmem setup node 3 [mem 0x0000000000000000-0xffffffffffffffff]
         On node 3 totalpages: 0
         Built 3 zonelists in Node order, mobility grouping on.  Total pages: 16090539
         Policy zone: Normal
         init_memory_mapping: [mem 0x60000000000-0x607ffffffff]
          [mem 0x60000000000-0x607ffffffff] page 1G
          [ffffea101fe00000-ffffea101fffffff] PMD -> [ffff8a074a400000-ffff8a074a5fffff] on node 2 <=== node 2 ???
          [ffffea1800000000-ffffea18001fffff] PMD -> [ffff8a074a600000-ffff8a074a7fffff] on node 3
          [ffffea1800200000-ffffea18005fffff] PMD -> [ffff8a074a000000-ffff8a074a3fffff] on node 3
          [ffffea1800600000-ffffea18009fffff] PMD -> [ffff8a0749c00000-ffff8a0749ffffff] on node 3
        ...
      
      The cause is the last region was missed at the and of hot add memory,
      and p_start, p_end, node_start were not reset, so when hot add memory to
      a new node, it will consider they are not contiguous blocks and print
      the previous one.  So we print the last vmemmap region at the end of hot
      add memory to avoid the confusion.
      Signed-off-by: default avatarZhu Guihua <zhugh.fnst@cn.fujitsu.com>
      Reviewed-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c435a390
    • Piotr Kwapulinski's avatar
      mm/mmap.c: optimization of do_mmap_pgoff function · e37609bb
      Piotr Kwapulinski authored
      The simple check for zero length memory mapping may be performed
      earlier.  So that in case of zero length memory mapping some unnecessary
      code is not executed at all.  It does not make the code less readable
      and saves some CPU cycles.
      Signed-off-by: default avatarPiotr Kwapulinski <kwapulinski.piotr@gmail.com>
      Acked-by: default avatarMichal Hocko <mhocko@suse.cz>
      Acked-by: default avatarRik van Riel <riel@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e37609bb