[patch 0/3] mm: memcontrol: lockless page counters v3
Hi, this series replaces the spinlock_irq-protected 64-bit res_counters with lockless word-sized page counters. This improves memory cgroup scalability on the higher end and gets rid of 64-bit math on 32-bit machines in the core accounting, but also generally simplifies the counter code and interface. Version 3 has a few more touch-ups based on reviews from Michal and Vladimir: - documented ordering between limit() and try_charge() [vladimir] - removed charge revert during uncharge underflow [michal] - reworked limit update code flow [michal] - removed rounding-up in limit setting [michal] - fixed mem_cgroup_margin() memsw calculation [michal] - updated page_counter raciness comments [vladimir] Version 2: cleanups: - moved new page_counter API to its own file [vladimir, michal] - documented page counter API [vladimir] - documented acceptable race conditions [vladimir] - split out res_counter removal to reduce patch size [vladimir] - split out hugetlb controller conversion to reduce patch size - split page_counter_charge and page_counter_try_charge [vladimir] - wrapped signed-to-unsigned read in page_counter_read() [vladimir] - wrapped watermark reset in page_counter_reset_watermark() [vladimir] - reverted counter->limited back to counter->failcnt [vladimir] - changed underflow to WARN_ON_ONCE and counter revert [kame, vladimir] fixes: - fixed kmem's value for unlimited [vladimir] - fixed page_counter_cancel() return value [vladimir] - based page counter range on atomic_long_t's max [vladimir] - fixed tcp memcontrol's usage reporting [vladimir] - fixed hugepage limit page alignment [vladimir] - fixed page_counter_limit() serialization [vladimir] optimizations: - converted page_counter_try_charge() from CAS to FAA [vladimir] Documentation/cgroups/hugetlb.txt | 2 +- Documentation/cgroups/memory.txt | 4 +- Documentation/cgroups/resource_counter.txt | 197 - include/linux/hugetlb_cgroup.h | 1 - include/linux/memcontrol.h | 5 +- include/linux/page_counter.h | 49 +++ include/linux/res_counter.h| 223 -- include/net/sock.h | 26 +- init/Kconfig | 12 +- kernel/Makefile| 1 - kernel/res_counter.c | 211 - mm/Makefile| 1 + mm/hugetlb_cgroup.c| 103 +++-- mm/memcontrol.c| 633 +-- mm/page_counter.c | 203 + net/ipv4/tcp_memcontrol.c | 87 ++-- 16 files changed, 669 insertions(+), 1089 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[patch 0/3] mm: memcontrol: lockless page counters v3
Hi, this series replaces the spinlock_irq-protected 64-bit res_counters with lockless word-sized page counters. This improves memory cgroup scalability on the higher end and gets rid of 64-bit math on 32-bit machines in the core accounting, but also generally simplifies the counter code and interface. Version 3 has a few more touch-ups based on reviews from Michal and Vladimir: - documented ordering between limit() and try_charge() [vladimir] - removed charge revert during uncharge underflow [michal] - reworked limit update code flow [michal] - removed rounding-up in limit setting [michal] - fixed mem_cgroup_margin() memsw calculation [michal] - updated page_counter raciness comments [vladimir] Version 2: cleanups: - moved new page_counter API to its own file [vladimir, michal] - documented page counter API [vladimir] - documented acceptable race conditions [vladimir] - split out res_counter removal to reduce patch size [vladimir] - split out hugetlb controller conversion to reduce patch size - split page_counter_charge and page_counter_try_charge [vladimir] - wrapped signed-to-unsigned read in page_counter_read() [vladimir] - wrapped watermark reset in page_counter_reset_watermark() [vladimir] - reverted counter-limited back to counter-failcnt [vladimir] - changed underflow to WARN_ON_ONCE and counter revert [kame, vladimir] fixes: - fixed kmem's value for unlimited [vladimir] - fixed page_counter_cancel() return value [vladimir] - based page counter range on atomic_long_t's max [vladimir] - fixed tcp memcontrol's usage reporting [vladimir] - fixed hugepage limit page alignment [vladimir] - fixed page_counter_limit() serialization [vladimir] optimizations: - converted page_counter_try_charge() from CAS to FAA [vladimir] Documentation/cgroups/hugetlb.txt | 2 +- Documentation/cgroups/memory.txt | 4 +- Documentation/cgroups/resource_counter.txt | 197 - include/linux/hugetlb_cgroup.h | 1 - include/linux/memcontrol.h | 5 +- include/linux/page_counter.h | 49 +++ include/linux/res_counter.h| 223 -- include/net/sock.h | 26 +- init/Kconfig | 12 +- kernel/Makefile| 1 - kernel/res_counter.c | 211 - mm/Makefile| 1 + mm/hugetlb_cgroup.c| 103 +++-- mm/memcontrol.c| 633 +-- mm/page_counter.c | 203 + net/ipv4/tcp_memcontrol.c | 87 ++-- 16 files changed, 669 insertions(+), 1089 deletions(-) -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
