linux/include/trace, branch v5.7

Merge tag 'rxrpc-fixes-20200520' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

2020-05-22T22:53:30Z

David Howells says: ==================== rxrpc: Fix retransmission timeout and ACK discard Here are a couple of fixes and an extra tracepoint for AF_RXRPC: (1) Calculate the RTO pretty much as TCP does, rather than making something up, including an initial 4s timeout (which causes return probes from the fileserver to fail if a packet goes missing), and add backoff. (2) Fix the discarding of out-of-order received ACKs. We mustn't let the hard-ACK point regress, nor do we want to do unnecessary retransmission because the soft-ACK list regresses. This is not trivial, however, due to some loose wording in various old protocol specs, the ACK field that should be used for this sometimes has the wrong information in it. (3) Add a tracepoint to log a discarded ACK. ==================== Signed-off-by: David S. Miller

rxrpc: Trace discarded ACKs

2020-05-20T14:33:41Z

Add a tracepoint to track received ACKs that are discarded due to being outside of the Tx window. Signed-off-by: David Howells

rxrpc: Fix the excessive initial retransmission timeout

2020-05-11T15:42:28Z

rxrpc currently uses a fixed 4s retransmission timeout until the RTT is sufficiently sampled. This can cause problems with some fileservers with calls to the cache manager in the afs filesystem being dropped from the fileserver because a packet goes missing and the retransmission timeout is greater than the call expiry timeout. Fix this by: (1) Copying the RTT/RTO calculation code from Linux's TCP implementation and altering it to fit rxrpc. (2) Altering the various users of the RTT to make use of the new SRTT value. (3) Replacing the use of rxrpc_resend_timeout to use the calculated RTO value instead (which is needed in jiffies), along with a backoff. Notes: (1) rxrpc provides RTT samples by matching the serial numbers on outgoing DATA packets that have the RXRPC_REQUEST_ACK set and PING ACK packets against the reference serial number in incoming REQUESTED ACK and PING-RESPONSE ACK packets. (2) Each packet that is transmitted on an rxrpc connection gets a new per-connection serial number, even for retransmissions, so an ACK can be cross-referenced to a specific trigger packet. This allows RTT information to be drawn from retransmitted DATA packets also. (3) rxrpc maintains the RTT/RTO state on the rxrpc_peer record rather than on an rxrpc_call because many RPC calls won't live long enough to generate more than one sample. (4) The calculated SRTT value is in units of 8ths of a microsecond rather than nanoseconds. The (S)RTT and RTO values are displayed in /proc/net/rxrpc/peers. Fixes: 17926a79320a ([AF_RXRPC]: Provide secure RxRPC sockets for use by userspace and kernel both"") Signed-off-by: David Howells

Merge tag 'block-5.7-2020-05-09' of git://git.kernel.dk/linux-block

2020-05-10T18:16:07Z

Pull block fixes from Jens Axboe: - a small series fixing a use-after-free of bdi name (Christoph,Yufen) - NVMe fix for a regression with the smaller CQ update (Alexey) - NVMe fix for a hang at namespace scanning error recovery (Sagi) - fix race with blk-iocost iocg->abs_vdebt updates (Tejun) * tag 'block-5.7-2020-05-09' of git://git.kernel.dk/linux-block: nvme: fix possible hang when ns scanning fails during error recovery nvme-pci: fix "slimmer CQ head update" bdi: add a ->dev_name field to struct backing_dev_info bdi: use bdi_dev_name() to get device name bdi: move bdi_dev_name out of line vboxsf: don't use the source name in the bdi name iocost: protect iocg->abs_vdebt with iocg->waitq.lock

bdi: use bdi_dev_name() to get device name

2020-05-09T22:07:39Z

Use the common interface bdi_dev_name() to get device name. Signed-off-by: Yufen Yu Signed-off-by: Christoph Hellwig Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jan Kara Reviewed-by: Bart Van Assche Add missing include BFQ Signed-off-by: Jens Axboe

Merge tag 'trace-v5.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2020-05-07T22:27:11Z

Pull tracing fixes from Steven Rostedt: - Fix bootconfig causing kernels to fail with CONFIG_BLK_DEV_RAM enabled - Fix allocation leaks in bootconfig tool - Fix a double initialization of a variable - Fix API bootconfig usage from kprobe boot time events - Reject NULL location for kprobes - Fix crash caused by preempt delay module not cleaning up kthread correctly - Add vmalloc_sync_mappings() to prevent x86_64 page faults from recursively faulting from tracing page faults - Fix comment in gpu/trace kerneldoc header - Fix documentation of how to create a trace event class - Make the local tracing_snapshot_instance_cond() function static * tag 'trace-v5.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tools/bootconfig: Fix resource leak in apply_xbc() tracing: Make tracing_snapshot_instance_cond() static tracing: Fix doc mistakes in trace sample gpu/trace: Minor comment updates for gpu_mem_total tracepoint tracing: Add a vmalloc_sync_mappings() for safe measure tracing: Wait for preempt irq delay thread to finish tracing/kprobes: Reject new event if loc is NULL tracing/boottime: Fix kprobe event API usage tracing/kprobes: Fix a double initialization typo bootconfig: Fix to remove bootconfig data from initrd while boot

gpu/trace: Minor comment updates for gpu_mem_total tracepoint

2020-05-07T17:32:57Z

This change updates the improper comment for the 'size' attribute in the tracepoint definition. Most gfx drivers pre-fault in physical pages instead of making virtual allocations. So we drop the 'Virtual' keyword here and leave this to the implementations. Link: http://lkml.kernel.org/r/20200428220825.169606-1-zzyiwei@google.com Signed-off-by: Yiwei Zhang Signed-off-by: Steven Rostedt (VMware)

Merge tag 'nfs-for-5.7-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

2020-05-02T18:24:01Z

Pull NFS client bugfixes from Trond Myklebust: "Highlights include: Stable fixes: - fix handling of backchannel binding in BIND_CONN_TO_SESSION Bugfixes: - Fix a credential use-after-free issue in pnfs_roc() - Fix potential posix_acl refcnt leak in nfs3_set_acl - defer slow parts of rpc_free_client() to a workqueue - Fix an Oopsable race in __nfs_list_for_each_server() - Fix trace point use-after-free race - Regression: the RDMA client no longer responds to server disconnect requests - Fix return values of xdr_stream_encode_item_{present, absent} - _pnfs_return_layout() must always wait for layoutreturn completion Cleanups: - Remove unreachable error conditions" * tag 'nfs-for-5.7-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFS: Fix a race in __nfs_list_for_each_server() NFSv4.1: fix handling of backchannel binding in BIND_CONN_TO_SESSION SUNRPC: defer slow parts of rpc_free_client() to a workqueue. NFSv4: Remove unreachable error condition due to rpc_run_task() SUNRPC: Remove unreachable error condition xprtrdma: Fix use of xdr_stream_encode_item_{present, absent} xprtrdma: Fix trace point use-after-free race xprtrdma: Restore wake-up-all to rpcrdma_cm_event_handler() nfs: Fix potential posix_acl refcnt leak in nfs3_set_acl NFS/pnfs: Fix a credential use-after-free issue in pnfs_roc() NFS/pnfs: Ensure that _pnfs_return_layout() waits for layoutreturn completion

Merge tag 'block-5.7-2020-04-24' of git://git.kernel.dk/linux-block

2020-04-24T19:44:19Z

Pull block fixes from Jens Axboe: "A few fixes/changes that should go into this release: - null_blk zoned fixes (Damien) - blkdev_close() sync improvement (Douglas) - Fix regression in blk-iocost that impacted (at least) systemtap (Waiman) - Comment fix, header removal (Zhiqiang, Jianpeng)" * tag 'block-5.7-2020-04-24' of git://git.kernel.dk/linux-block: null_blk: Cleanup zoned device initialization null_blk: Fix zoned command handling block: remove unused header blk-iocost: Fix error on iocost_ioc_vrate_adj bdev: Reduce time holding bd_mutex in sync in blkdev_close() buffer: remove useless comment and WB_REASON_FREE_MORE_MEM, reason.

Merge tag 'nfsd-5.7-rc-1' of git://git.linux-nfs.org/projects/cel/cel-2.6

2020-04-23T16:33:43Z

Pull nfsd fixes from Chuck Lever: "The first set of 5.7-rc fixes for NFS server issues. These were all unresolved at the time the 5.7 window opened, and needed some additional time to ensure they were correctly addressed. They are ready now. At the moment I know of one more urgent issue regarding the NFS server. A fix has been tested and is under review. I expect to send one more pull request, containing this fix (which now consists of 3 patches). Fixes: - Address several use-after-free and memory leak bugs - Prevent a backchannel livelock" * tag 'nfsd-5.7-rc-1' of git://git.linux-nfs.org/projects/cel/cel-2.6: svcrdma: Fix leak of svc_rdma_recv_ctxt objects svcrdma: Fix trace point use-after-free race SUNRPC: Fix backchannel RPC soft lockups SUNRPC/cache: Fix unsafe traverse caused double-free in cache_purge nfsd: memory corruption in nfsd4_lock()