This series contains a major fix for client-side NFS/RDMA. When a signal fires, it's possible for the server's RPC reply to race with the client code that terminates the RPC after a signal. The result is both of these code paths try to invalidate the same MR at the same time. Because FRWR invalidation is typically fast, it's nearly impossible to hit the race with FRWR. However, FMR invalidation happens at about the same speed as the NFS server responds, so it's more likely to hit this window when using FMR. FMR is also more sensitive to concurrent operations on the same MR, which can result in a kernel crash or an HCA firmware reset. As part of closing the signal race window, the reply handler is restructured and several error recovery paths in the invalidation code are fixed. In addition to this fix, there are a pair of small but important changes to make NFSv4.1 Transparent State Migration work. These enable basic migration test cases to pass successfully. Available in the "nfs-rdma-for-4.13" topic branch of this git repo: git://git.linux-nfs.org/projects/cel/cel-2.6.git Or for browsing: http://git.linux-nfs.org/?p=cel/cel-2.6.git;a=log;h=refs/heads/nfs-rdma-for-4.13 Changes since v1: - Moved back-portable fixes to top of series - Split fixes for CONFIRMED_R and contrived slot into separate patches - Tested and reworked fixes for CONFIRMED_R and contrived slot number --- Chuck Lever (13): xprtrdma: On invalidation failure, remove MWs from rl_registered xprtrdma: Pre-mark remotely invalidated MRs xprtrdma: Pass only the list of registered MRs to ro_unmap_sync xprtrdma: Rename rpcrdma_req::rl_free xprtrdma: Fix client lock-up after application signal fires xprtrdma: Fix FRWR invalidation error recovery xprtrdma: Don't defer MR recovery if ro_map fails NFSv4.1: Handle EXCHGID4_FLAG_CONFIRMED_R during NFSv4.1 migration NFSv4.1: Use seqid returned by EXCHANGE_ID after state migration xprtrdma: Demote "connect" log messages xprtrdma: FMR does not need list_del_init() xprtrdma: Replace PAGE_MASK with offset_in_page() xprtrdma: Fix documenting comments in frwr_ops.c fs/nfs/nfs4client.c | 5 ++ fs/nfs/nfs4proc.c | 7 +- fs/nfs/nfs4state.c | 16 +++-- include/linux/nfs_fs_sb.h | 2 + net/sunrpc/xprtrdma/fmr_ops.c | 47 ++++++++------- net/sunrpc/xprtrdma/frwr_ops.c | 69 ++++++++++------------ net/sunrpc/xprtrdma/rpc_rdma.c | 125 +++++++++++++++++++++++++-------------- net/sunrpc/xprtrdma/transport.c | 3 + net/sunrpc/xprtrdma/verbs.c | 55 ++++------------- net/sunrpc/xprtrdma/xprt_rdma.h | 40 ++++++++++++ 10 files changed, 215 insertions(+), 154 deletions(-) -- Chuck Lever -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
