Btrfs

    Introduce new rescue mount option to group all existing mount options for recovery. usebackuproot is an alias for rescue=usebackuproot and nologreplay is an alias for rescue=nologreplay commit

    Better fsync() performance (12% decrease on max latency reported by dbench) commit, commit, commit, commit

    Massive speed up of parallel fsync by reducing number of checksum tree lookups and contention, the improvements start to show up with 2 tasks with +20% throughput and -16% runtime up to 64 with +200% throughput and -66% runtime commit, commit, commit

    Speed up parallel fsync of files with reflinked/deduped extents, with jobs 16 to 1024 the throughput gets improved roughly by 50% on average and runtime decreased roughly by 30% on average commit

RDMA

    Add Enhanced Connection Established (ECE), a new negotiation scheme introduced in IBTA v1.4 to exchange extra information about nodes capabilities and later negotiate them at the connection establishment phase commit, commit, commit, commit, commit, commit

    RDMA shared CQ pool commit, commit

    Enable asynchronous event FD per object commit, commit, commit, commit, commit, commit, commit

    Add support for RTRS (RDMA Transport), a reliable high speed transport library which allows for establishing connection between client and server machines via RDMA. RTRS is multipath capable and provides I/O fail-over and load-balancing functionality. RNBD (RDMA Network Block Device) is a pair of kernel modules (client and server) that allow for remote access of a block device on the server over RTRS protocol commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit