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From:   trondmy@kernel.org
To:     Anna Schumaker <anna.schumaker@netapp.com>
Cc:     linux-nfs@vger.kernel.org
Subject: [PATCH 0/4] pNFS/flexfiles: Cancel I/O if the layout is revoked
Date:   Wed,  5 Oct 2022 15:57:34 -0400
Message-Id: <20221005195738.4552-1-trondmy@kernel.org>
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From: Trond Myklebust <trond.myklebust@hammerspace.com>

The pNFS/flexfiles driver is capable of having a lot of outstanding I/O
in the RPC layer when it flushes out the writeback data. If the server
decides to recall or revoke the layout when this happens, then it takes
a while for that I/O to complete.
To speed things up, add an API to allow the flexfiles driver to cancel
that I/O and hence return the layout earlier.

Trond Myklebust (4):
  SUNRPC: Fix races with rpc_killall_tasks()
  SUNRPC: Add a helper to allow pNFS drivers to selectively cancel RPC
    calls
  SUNRPC: Add API to force the client to disconnect
  NFSv4/flexfiles: Cancel I/O if the layout is recalled or revoked

 fs/nfs/flexfilelayout/flexfilelayout.c | 84 +++++++++++++++++++++++++-
 fs/nfs/pnfs.c                          |  9 ++-
 fs/nfs/pnfs.h                          |  9 +++
 include/linux/sunrpc/clnt.h            |  1 +
 include/linux/sunrpc/sched.h           |  6 ++
 net/sunrpc/clnt.c                      | 57 +++++++++++++++--
 net/sunrpc/sched.c                     | 51 +++++++++++-----
 net/sunrpc/xprtsock.c                  |  3 +-
 8 files changed, 194 insertions(+), 26 deletions(-)

-- 
2.37.3