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Message-ID: <1407996977.5490.56.camel@pasglop> Date: Thu, 14 Aug 2014 16:16:17 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>, Linux Kernel list <linux-kernel@...r.kernel.org> Subject: [git pull] Please pull powerpc.git next branch Hi Linus ! Here are some more powerpc bits for 3.17, essentially fixes. The biggest series, also aimed at -stable, is from Aneesh and is the result of weeks and weeks of debugging to find out why the heck or THP implementation was occasionally triggering multi-hit errors in our level 1 TLB. It ended up being a combination of issues including subtleties as to how we should invalidate those special 'MPSS' pages we use to allow the use of 16M pages inside 4K/64K "base page size" segments (you really have to love our MMU !) Another interesting one in the "OMG" category is the series from Michael adding memory barriers to spin_is_locked(). That's also the result of many days of debugging to figure out why the semaphore code would occasionally crash in ways that made no sense. It ended up being some creative lock stacking that was defeated by the fact that our locks allow a load inside the locked section to be re-ordered with the load of the lock value itself (I'm still of two mind about whether to kill that once and for all by putting a heavier barrier back into our lock implementation...). The fixes come with a long explanation in the cset comments, feel free to read it if you feel like having a headache today. Cheers, Ben. The following changes since commit 58d08e3b2c2033354b91467da33deffa06360c28: Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform (2014-08-10 11:13:58 -0700) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git next for you to fetch changes up to 9e813308a5c18c58f9ccae1ec72ed4e14eaf9025: powerpc/thp: Add tracepoints to track hugepage invalidate (2014-08-13 18:20:42 +1000) ---------------------------------------------------------------- Alistair Popple (1): powerpc/ppc476: Disable BTAC Aneesh Kumar K.V (8): powerpc/thp: Add write barrier after updating the valid bit powerpc/thp: Don't recompute vsid and ssize in loop on invalidate powerpc/thp: Invalidate old 64K based hash page mapping before insert of 4k pte powerpc/thp: Handle combo pages in invalidate powerpc/thp: Invalidate with vpn in loop powerpc/thp: Use ACCESS_ONCE when loading pmdp powerpc/mm: Use read barrier when creating real_pte powerpc/thp: Add tracepoints to track hugepage invalidate Anton Blanchard (1): powerpc: Hard disable interrupts in xmon Benjamin Herrenschmidt (1): powerpc/boot: Use correct zlib types for comparison Gavin Shan (3): powerpc/powernv: Fix IOMMU group lost powerpc/pseries: Failure on removing device node powerpc/pseries: Avoid deadlock on removing ddw Guenter Roeck (1): powerpc: Fix "attempt to move .org backwards" error Himangi Saraogi (1): powerpc/perf/hv-24x7: Use kmem_cache_free Michael Ellerman (3): powerpc: Add smp_mb() to arch_spin_is_locked() powerpc: Add smp_mb()s to arch_spin_unlock_wait() powerpc: Add POWER8 features to CPU_FTRS_POSSIBLE/ALWAYS Nishanth Aravamudan (2): powerpc: remove duplicate definition of TEXASR_FS powerpc: reorder per-cpu NUMA information's initialization Scott Wood (1): powerpc/nohash: Split __early_init_mmu() into boot and secondary Thomas Falcon (1): powerpc/pseries/hvcserver: Fix endian issue in hvcs_get_partner_info Vasant Hegde (2): printk: Add function to return log buffer address and size powerpc/powernv: Interface to register/unregister opal dump region arch/powerpc/boot/gunzip_util.c | 4 +- arch/powerpc/include/asm/cputable.h | 6 +- arch/powerpc/include/asm/machdep.h | 6 +- arch/powerpc/include/asm/opal.h | 11 +++ arch/powerpc/include/asm/pgtable-ppc64.h | 2 +- arch/powerpc/include/asm/pte-hash64-64k.h | 30 +++++-- arch/powerpc/include/asm/reg.h | 3 +- arch/powerpc/include/asm/spinlock.h | 1 + arch/powerpc/kernel/exceptions-64s.S | 110 +++++++++++------------ arch/powerpc/kernel/head_44x.S | 4 +- arch/powerpc/kernel/iommu.c | 38 ++++---- arch/powerpc/kernel/smp.c | 11 ++- arch/powerpc/lib/locks.c | 4 + arch/powerpc/mm/hash_native_64.c | 40 +++------ arch/powerpc/mm/hugepage-hash64.c | 88 ++++++++++++++++--- arch/powerpc/mm/numa.c | 13 ++- arch/powerpc/mm/pgtable_64.c | 44 ++++++---- arch/powerpc/mm/tlb_hash64.c | 6 +- arch/powerpc/mm/tlb_nohash.c | 111 ++++++++++++++---------- arch/powerpc/perf/hv-24x7.c | 2 +- arch/powerpc/platforms/powernv/opal-wrappers.S | 2 + arch/powerpc/platforms/powernv/opal.c | 23 +++++ arch/powerpc/platforms/powernv/pci-ioda.c | 2 +- arch/powerpc/platforms/pseries/hotplug-memory.c | 2 +- arch/powerpc/platforms/pseries/hvcserver.c | 4 +- arch/powerpc/platforms/pseries/iommu.c | 20 +++-- arch/powerpc/platforms/pseries/lpar.c | 20 ++--- arch/powerpc/xmon/xmon.c | 3 + include/linux/printk.h | 3 + include/trace/events/thp.h | 88 +++++++++++++++++++ kernel/printk/printk.c | 12 +++ 31 files changed, 490 insertions(+), 223 deletions(-) create mode 100644 include/trace/events/thp.h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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