- 16 Jan, 2015 2 commits
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Rob Herring authored
Some instances of pci_ops initialization rely on the read/write members' location in the struct. This is fragile and may break when adding new members to the beginning of the struct. [ralf@linux-mips.org: indent = with tabs for consistency.] Signed-off-by:
Rob Herring <robh@kernel.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-pci@vger.kernel.org Cc: Bjorn Helgaas <bhelgaas@google.com> Patchwork: https://patchwork.linux-mips.org/patch/8915/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Geert Uytterhoeven authored
Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8928/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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- 13 Jan, 2015 8 commits
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Ralf Baechle authored
Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Its implementation is identical to MIPS. Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
Right now the MIPS <asm/checksum.h> still overrides all functions. This will change in the future. Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle authored
This isn't only short and easier to read and fully portable but also shrinks a Malta kernel's by 160 bytes. Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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- 11 Jan, 2015 9 commits
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Linus Torvalds authored
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git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds authored
Pull ARM fixes from Russell King: "Three small fixes from over the Christmas period, and wiring up the new execveat syscall for ARM" * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: 8275/1: mm: fix PMD_SECT_RDONLY undeclared compile error ARM: 8253/1: mm: use phys_addr_t type in map_lowmem() for kernel mem region ARM: 8249/1: mm: dump: don't skip regions ARM: wire up execveat syscall
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Ingo Molnar: "Misc fixes: two vdso fixes, two kbuild fixes and a boot failure fix with certain odd memory mappings" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, vdso: Use asm volatile in __getcpu x86/build: Clean auto-generated processor feature files x86: Fix mkcapflags.sh bash-ism x86: Fix step size adjustment during initial memory mapping x86_64, vdso: Fix the vdso address randomization algorithm
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fixes from Ingo Molnar: "Misc fixes: group scheduling corner case fix, two deadline scheduler fixes, effective_load() overflow fix, nested sleep fix, 6144 CPUs system fix" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/fair: Fix RCU stall upon -ENOMEM in sched_create_group() sched/deadline: Avoid double-accounting in case of missed deadlines sched/deadline: Fix migration of SCHED_DEADLINE tasks sched: Fix odd values in effective_load() calculations sched, fanotify: Deal with nested sleeps sched: Fix KMALLOC_MAX_SIZE overflow during cpumask allocation
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull perf fixes from Ingo Molnar: "Mostly tooling fixes, but also some kernel side fixes: uncore PMU driver fix, user regs sampling fix and an instruction decoder fix that unbreaks PEBS precise sampling" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/uncore/hsw-ep: Handle systems with only two SBOXes perf/x86_64: Improve user regs sampling perf: Move task_pt_regs sampling into arch code x86: Fix off-by-one in instruction decoder perf hists browser: Fix segfault when showing callchain perf callchain: Free callchains when hist entries are deleted perf hists: Fix children sort key behavior perf diff: Fix to sort by baseline field by default perf list: Fix --raw-dump option perf probe: Fix crash in dwarf_getcfi_elf perf probe: Fix to fall back to find probe point in symbols perf callchain: Append callchains only when requested perf ui/tui: Print backtrace symbols when segfault occurs perf report: Show progress bar for output resorting
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull locking fixes from Ingo Molnar: "A liblockdep fix and a mutex_unlock() mutex-debugging fix" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: mutex: Always clear owner field upon mutex_unlock() tools/liblockdep: Fix debug_check thinko in mutex destroy
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Konstantin Khlebnikov authored
Fix for BUG_ON(anon_vma->degree) splashes in unlink_anon_vmas() ("kernel BUG at mm/rmap.c:399!") caused by commit 7a3ef208 ("mm: prevent endless growth of anon_vma hierarchy") Anon_vma_clone() is usually called for a copy of source vma in destination argument. If source vma has anon_vma it should be already in dst->anon_vma. NULL in dst->anon_vma is used as a sign that it's called from anon_vma_fork(). In this case anon_vma_clone() finds anon_vma for reusing. Vma_adjust() calls it differently and this breaks anon_vma reusing logic: anon_vma_clone() links vma to old anon_vma and updates degree counters but vma_adjust() overrides vma->anon_vma right after that. As a result final unlink_anon_vmas() decrements degree for wrong anon_vma. This patch assigns ->anon_vma before calling anon_vma_clone(). Signed-off-by:
Konstantin Khlebnikov <koct9i@gmail.com> Reported-and-tested-by:
Chris Clayton <chris2553@googlemail.com> Reported-and-tested-by:
Oded Gabbay <oded.gabbay@amd.com> Reported-and-tested-by:
Chih-Wei Huang <cwhuang@android-x86.org> Acked-by:
Rik van Riel <riel@redhat.com> Acked-by:
Vlastimil Babka <vbabka@suse.cz> Cc: Daniel Forrest <dan.forrest@ssec.wisc.edu> Cc: Michal Hocko <mhocko@suse.cz> Cc: stable@vger.kernel.org # to match back-porting of 7a3ef208Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
Commit fee7e49d ("mm: propagate error from stack expansion even for guard page") made sure that we return the error properly for stack growth conditions. It also theorized that counting the guard page towards the stack limit might break something, but also said "Let's see if anybody notices". Somebody did notice. Apparently android-x86 sets the stack limit very close to the limit indeed, and including the guard page in the rlimit check causes the android 'zygote' process problems. So this adds the (fairly trivial) code to make the stack rlimit check be against the actual real stack size, rather than the size of the vma that includes the guard page. Reported-and-tested-by:
Chih-Wei Huang <cwhuang@android-x86.org> Cc: Jay Foad <jay.foad@gmail.com> Cc: stable@kernel.org # to match back-porting of fee7e49dSigned-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Ingo Molnar authored
Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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- 10 Jan, 2015 10 commits
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git://github.com/awilliam/linux-vfioLinus Torvalds authored
Pull VFIO fix from Alex Williamson: "Fix PCI header check in vfio_pci_probe() (Wei Yang)" * tag 'vfio-v3.19-rc4' of git://github.com/awilliam/linux-vfio: vfio-pci: Fix the check on pci device type in vfio_pci_probe()
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fix from James Bottomley: "Just one fix: a qlogic busy wait regression" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: qla2xxx: fix busy wait regression
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/soundLinus Torvalds authored
Pull sound fixes from Takashi Iwai: "All a few small regression or stable fixes: a Nvidia HDMI ID addition, a regression fix for CAIAQ stream count, a typo fix for GPIO setup with STAC/IDT HD-audio codecs, and a Fireworks big-endian fix" * tag 'sound-3.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: fireworks: fix an endianness bug for transaction length ALSA: hda - Add new GPU codec ID 0x10de0072 to snd-hda ALSA: hda - Fix wrong gpio_dir & gpio_mask hint setups for IDT/STAC codecs ALSA: snd-usb-caiaq: fix stream count check
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hidLinus Torvalds authored
Pull HID updates from Jiri Kosina: - bounds checking fixes in logitech and roccat drivers, from Peter Wu and Dan Carpenter - double-kfree fix in i2c-hid driver on bus shutdown, from Mika Westerberg - a couple of various small driver fixes - a few device id additions * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: roccat: potential out of bounds in pyra_sysfs_write_settings() HID: Add a new id 0x501a for Genius MousePen i608X HID: logitech-hidpp: prefix the name with "Logitech" HID: logitech-hidpp: avoid unintended fall-through HID: Allow HID_BATTERY_STRENGTH to be enabled HID: i2c-hid: Do not free buffers in i2c_hid_stop() HID: add battery quirk for USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO keyboard HID: logitech-hidpp: check WTP report length HID: logitech-dj: check report length
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
Pull drm fixes from Dave Airlie: "I'm briefly working between holidays and LCA, so this is close to a couple of weeks of fixes, Two sets of amdkfd fixes, this is a new feature this kernel, and this pull fixes a few issues since it got merged, ordering when built-in to kernel and also the iommu vs gpu ordering patch, it also reworks the ioctl before the initial release. Otherwise: - radeon: some misc fixes all over, hdmi, 4k, dpm - nouveau: mcp77 init fixes, oops fix, bug on fix, msi fix - i915: power fixes, revert VGACNTR patch Probably be quiteer next week since I'll be at LCA anyways" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (33 commits) drm/amdkfd: rewrite kfd_ioctl() according to drm_ioctl() drm/amdkfd: reformat IOCTL definitions to drm-style drm/amdkfd: Do copy_to/from_user in general kfd_ioctl() drm/radeon: integer underflow in radeon_cp_dispatch_texture() drm/radeon: adjust default bapm settings for KV drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw drm/radeon: fix sad_count check for dce3 drm/radeon: KV has three PPLLs (v2) drm/amdkfd: unmap VMID<-->PASID when relesing VMID (non-HWS) drm/radeon: Init amdkfd only if it was compiled amdkfd: actually allocate longs for the pasid bitmask drm/nouveau/nouveau: Do not BUG_ON(!spin_is_locked()) on UP drm/nv4c/mc: disable msi drm/nouveau/fb/ram/mcp77: enable NISO poller drm/nouveau/fb/ram/mcp77: use carveout reg to determine size drm/nouveau/fb/ram/mcp77: subclass nouveau_ram drm/nouveau: wake up the card if necessary during gem callbacks drm/nouveau/device: Add support for GK208B, resolves bug 86935 drm/nouveau: fix missing return statement in nouveau_ttm_tt_unpopulate drm/nouveau/bios: fix oops on pre-nv50 chipsets ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linuxLinus Torvalds authored
Pull arm64 fixes from Will Deacon: "Here is a handful of minor arm64 fixes discovered and fixed over the Christmas break. The main part is adding some missing #includes that we seem to be getting transitively but have started causing problems in -next. - Fix early mapping fixmap corruption by EFI runtime services - Fix __NR_compat_syscalls off-by-one - Add missing sanity checks for some 32-bit registers - Add some missing #includes which we get transitively - Remove unused prepare_to_copy() macro" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64/efi: add missing call to early_ioremap_reset() arm64: fix missing asm/io.h include in kernel/smp_spin_table.c arm64: fix missing asm/alternative.h include in kernel/module.c arm64: fix missing linux/bug.h include in asm/arch_timer.h arm64: fix missing asm/pgtable-hwdef.h include in asm/processor.h arm64: sanity checks: add missing AArch32 registers arm64: Remove unused prepare_to_copy() arm64: Correct __NR_compat_syscalls for bpf
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git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdbLinus Torvalds authored
Pull kgdb/kdb fixes from Jason Wessel: "These have been around since 3.17 and in kgdb-next for the last 9 weeks and some will go back to -stable. Summary of changes: Cleanups - kdb: Remove unused command flags, repeat flags and KDB_REPEAT_NONE Fixes - kgdb/kdb: Allow access on a single core, if a CPU round up is deemed impossible, which will allow inspection of the now "trashed" kernel - kdb: Add enable mask for the command groups - kdb: access controls to restrict sensitive commands" * tag 'for_linus-3.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb: kernel/debug/debug_core.c: Logging clean-up kgdb: timeout if secondary CPUs ignore the roundup kdb: Allow access to sensitive commands to be restricted by default kdb: Add enable mask for groups of commands kdb: Categorize kdb commands (similar to SysRq categorization) kdb: Remove KDB_REPEAT_NONE flag kdb: Use KDB_REPEAT_* values as flags kdb: Rename kdb_register_repeat() to kdb_register_flags() kdb: Rename kdb_repeat_t to kdb_cmdflags_t, cmd_repeat to cmd_flags kdb: Remove currently unused kdbtab_t->cmd_flags
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git://linux-nfs.org/~bfields/linuxLinus Torvalds authored
Pull two nfsd bugfixes from Bruce Fields. * 'for-3.19' of git://linux-nfs.org/~bfields/linux: rpc: fix xdr_truncate_encode to handle buffer ending on page boundary nfsd: fix fi_delegees leak when fi_had_conflict returns true
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-clientLinus Torvalds authored
Pull two Ceph fixes from Sage Weil: "These are both pretty trivial: a sparse warning fix and size_t printk thing" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: fix sparse endianness warnings ceph: use %zu for len in ceph_fill_inline_data()
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfsLinus Torvalds authored
Pull btrfs fixes from Chris Mason: "None of these are huge, but my commit does fix a regression from 3.18 that could cause lost files during log replay. This also adds Dave Sterba to the list of Btrfs maintainers. It doesn't mean we're doing things differently, but Dave has really been helping with the maintainer workload for years" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: don't delay inode ref updates during log replay Btrfs: correctly get tree level in tree_backref_for_extent Btrfs: call inode_dec_link_count() on mkdir error path Btrfs: abort transaction if we don't find the block group Btrfs, scrub: uninitialized variable in scrub_extent_for_parity() Btrfs: add more maintainers
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- 09 Jan, 2015 11 commits
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "12 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm, vmscan: prevent kswapd livelock due to pfmemalloc-throttled process being killed memcg: fix destination cgroup leak on task charges migration mm: memcontrol: switch soft limit default back to infinity mm/debug_pagealloc: remove obsolete Kconfig options vfs: renumber FMODE_NONOTIFY and add to uniqueness check arch/blackfin/mach-bf533/boards/stamp.c: add linux/delay.h ocfs2: fix the wrong directory passed to ocfs2_lookup_ino_from_name() when link file MAINTAINERS: update rydberg's addresses mm: protect set_page_dirty() from ongoing truncation mm: prevent endless growth of anon_vma hierarchy exit: fix race between wait_consider_task() and wait_task_zombie() ocfs2: remove bogus check in dlm_process_recovery_data
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Victor Kamensky authored
In v3.19-rc3 tree when CONFIG_ARM_LPAE and CONFIG_DEBUG_RODATA are enabled image failed to compile with the following error: arch/arm/mm/init.c:661:14: error: ‘PMD_SECT_RDONLY’ undeclared here (not in a function) It seems that '80d6b0c2 ARM: mm: allow text and rodata sections to be read-only' and 'ded94779 ARM: 8109/1: mm: Modify pte_write and pmd_write logic for LPAE' commits crossed. 80d6b0c2 uses PMD_SECT_RDONLY macro but ded94779 renames it and uses software bits L_PMD_SECT_RDONLY instead. Fix is to use L_PMD_SECT_RDONLY instead PMD_SECT_RDONLY as ded94779 does in another places. Signed-off-by:
Victor Kamensky <victor.kamensky@linaro.org> Acked-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
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Dan Carpenter authored
This is a static checker fix. We write some binary settings to the sysfs file. One of the settings is the "->startup_profile". There isn't any checking to make sure it fits into the pyra->profile_settings[] array in the profile_activated() function. I added a check to pyra_sysfs_write_settings() in both places because I wasn't positive that the other callers were correct. Cc: <stable@vger.kernel.org> Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz>
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Chris Wilson authored
Currently if DEBUG_MUTEXES is enabled, the mutex->owner field is only cleared iff debug_locks is active. This exposes a race to other users of the field where the mutex->owner may be still set to a stale value, potentially upsetting mutex_spin_on_owner() among others. References: https://bugs.freedesktop.org/show_bug.cgi?id=87955Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by:
Davidlohr Bueso <dave@stgolabs.net> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1420540175-30204-1-git-send-email-chris@chris-wilson.co.ukSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Tetsuo Handa authored
When alloc_fair_sched_group() in sched_create_group() fails, free_sched_group() is called, and free_fair_sched_group() is called by free_sched_group(). Since destroy_cfs_bandwidth() is called by free_fair_sched_group() without calling init_cfs_bandwidth(), RCU stall occurs at hrtimer_cancel(): INFO: rcu_sched self-detected stall on CPU { 1} (t=60000 jiffies g=13074 c=13073 q=0) Task dump for CPU 1: (fprintd) R running task 0 6249 1 0x00000088 ... Call Trace: <IRQ> [<ffffffff81094988>] sched_show_task+0xa8/0x110 [<ffffffff81097acd>] dump_cpu_task+0x3d/0x50 [<ffffffff810c3a80>] rcu_dump_cpu_stacks+0x90/0xd0 [<ffffffff810c7751>] rcu_check_callbacks+0x491/0x700 [<ffffffff810cbf2b>] update_process_times+0x4b/0x80 [<ffffffff810db046>] tick_sched_handle.isra.20+0x36/0x50 [<ffffffff810db0a2>] tick_sched_timer+0x42/0x70 [<ffffffff810ccb19>] __run_hrtimer+0x69/0x1a0 [<ffffffff810db060>] ? tick_sched_handle.isra.20+0x50/0x50 [<ffffffff810ccedf>] hrtimer_interrupt+0xef/0x230 [<ffffffff810452cb>] local_apic_timer_interrupt+0x3b/0x70 [<ffffffff8164a465>] smp_apic_timer_interrupt+0x45/0x60 [<ffffffff816485bd>] apic_timer_interrupt+0x6d/0x80 <EOI> [<ffffffff810cc588>] ? lock_hrtimer_base.isra.23+0x18/0x50 [<ffffffff81193cf1>] ? __kmalloc+0x211/0x230 [<ffffffff810cc9d2>] hrtimer_try_to_cancel+0x22/0xd0 [<ffffffff81193cf1>] ? __kmalloc+0x211/0x230 [<ffffffff810ccaa2>] hrtimer_cancel+0x22/0x30 [<ffffffff810a3cb5>] free_fair_sched_group+0x25/0xd0 [<ffffffff8108df46>] free_sched_group+0x16/0x40 [<ffffffff810971bb>] sched_create_group+0x4b/0x80 [<ffffffff810aa383>] sched_autogroup_create_attach+0x43/0x1c0 [<ffffffff8107dc9c>] sys_setsid+0x7c/0x110 [<ffffffff81647729>] system_call_fastpath+0x12/0x17 Check whether init_cfs_bandwidth() was called before calling destroy_cfs_bandwidth(). Signed-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> [ Move the check into destroy_cfs_bandwidth() to aid compilability. ] Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Paul Turner <pjt@google.com> Cc: Ben Segall <bsegall@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/201412252210.GCC30204.SOMVFFOtQJFLOH@I-love.SAKURA.ne.jpSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Luca Abeni authored
The dl_runtime_exceeded() function is supposed to ckeck if a SCHED_DEADLINE task must be throttled, by checking if its current runtime is <= 0. However, it also checks if the scheduling deadline has been missed (the current time is larger than the current scheduling deadline), further decreasing the runtime if this happens. This "double accounting" is wrong: - In case of partitioned scheduling (or single CPU), this happens if task_tick_dl() has been called later than expected (due to small HZ values). In this case, the current runtime is also negative, and replenish_dl_entity() can take care of the deadline miss by recharging the current runtime to a value smaller than dl_runtime - In case of global scheduling on multiple CPUs, scheduling deadlines can be missed even if the task did not consume more runtime than expected, hence penalizing the task is wrong This patch fix this problem by throttling a SCHED_DEADLINE task only when its runtime becomes negative, and not modifying the runtime Signed-off-by:
Luca Abeni <luca.abeni@unitn.it> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by:
Juri Lelli <juri.lelli@gmail.com> Cc: <stable@vger.kernel.org> Cc: Dario Faggioli <raistlin@linux.it> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1418813432-20797-3-git-send-email-luca.abeni@unitn.itSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Luca Abeni authored
According to global EDF, tasks should be migrated between runqueues without checking if their scheduling deadlines and runtimes are valid. However, SCHED_DEADLINE currently performs such a check: a migration happens doing: deactivate_task(rq, next_task, 0); set_task_cpu(next_task, later_rq->cpu); activate_task(later_rq, next_task, 0); which ends up calling dequeue_task_dl(), setting the new CPU, and then calling enqueue_task_dl(). enqueue_task_dl() then calls enqueue_dl_entity(), which calls update_dl_entity(), which can modify scheduling deadline and runtime, breaking global EDF scheduling. As a result, some of the properties of global EDF are not respected: for example, a taskset {(30, 80), (40, 80), (120, 170)} scheduled on two cores can have unbounded response times for the third task even if 30/80+40/80+120/170 = 1.5809 < 2 This can be fixed by invoking update_dl_entity() only in case of wakeup, or if this is a new SCHED_DEADLINE task. Signed-off-by:
Luca Abeni <luca.abeni@unitn.it> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by:
Juri Lelli <juri.lelli@gmail.com> Cc: <stable@vger.kernel.org> Cc: Dario Faggioli <raistlin@linux.it> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1418813432-20797-2-git-send-email-luca.abeni@unitn.itSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Yuyang Du authored
In effective_load, we have (long w * unsigned long tg->shares) / long W, when w is negative, it is cast to unsigned long and hence the product is insanely large. Fix this by casting tg->shares to long. Reported-by:
Sasha Levin <sasha.levin@oracle.com> Signed-off-by:
Yuyang Du <yuyang.du@intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Dave Jones <davej@redhat.com> Cc: Andrey Ryabinin <a.ryabinin@samsung.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20141219002956.GA25405@intel.comSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Peter Zijlstra authored
As per e23738a7 ("sched, inotify: Deal with nested sleeps"). fanotify_read is a wait loop with sleeps in. Wait loops rely on task_struct::state and sleeps do too, since that's the only means of actually sleeping. Therefore the nested sleeps destroy the wait loop state and the wait loop breaks the sleep functions that assume TASK_RUNNING (mutex_lock). Fix this by using the new woken_wake_function and wait_woken() stuff, which registers wakeups in wait and thereby allows shrinking the task_state::state changes to the actual sleep part. Reported-by:
Yuanhan Liu <yuanhan.liu@linux.intel.com> Reported-by:
Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Takashi Iwai <tiwai@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Paris <eparis@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Eric Paris <eparis@redhat.com> Link: http://lkml.kernel.org/r/20141216152838.GZ3337@twins.programming.kicks-ass.netSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Andi Kleen authored
There was another report of a boot failure with a #GP fault in the uncore SBOX initialization. The earlier work around was not enough for this system. The boot was failing while trying to initialize the third SBOX. This patch detects parts with only two SBOXes and limits the number of SBOX units to two there. Stable material, as it affects boot problems on 3.18. Tested-by:
Andreas Oehler <andreas@oehler-net.de> Signed-off-by:
Andi Kleen <ak@linux.intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: <stable@vger.kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Yan, Zheng <zheng.z.yan@intel.com> Link: http://lkml.kernel.org/r/1420583675-9163-1-git-send-email-andi@firstfloor.orgSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Andy Lutomirski authored
Perf reports user regs for kernel-mode samples so that samples can be backtraced through user code. The old code was very broken in syscall context, resulting in useless backtraces. The new code, in contrast, is still dangerously racy, but it should at least work most of the time. Tested-by:
Jiri Olsa <jolsa@kernel.org> Signed-off-by:
Andy Lutomirski <luto@amacapital.net> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: chenggang.qcg@taobao.com Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/243560c26ff0f739978e2459e203f6515367634d.1420396372.git.luto@amacapital.netSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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