Revision d9aba2b40de6fddd83f2fe3a5ac2bcd2c98fa66b authored by Trond Myklebust on 16 July 2019, 19:38:28 UTC, committed by Trond Myklebust on 18 July 2019, 18:43:52 UTC
The NFSv4.1 protocol explicitly forbids us from using the zero stateid together with layoutget, so when we see that nfs4_select_rw_stateid() is unable to return a valid delegation, lock or open stateid, then we should initiate recovery and retry. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
1 parent 7402a4f
Kconfig.iosched
# SPDX-License-Identifier: GPL-2.0
if BLOCK
menu "IO Schedulers"
config MQ_IOSCHED_DEADLINE
tristate "MQ deadline I/O scheduler"
default y
---help---
MQ version of the deadline IO scheduler.
config MQ_IOSCHED_KYBER
tristate "Kyber I/O scheduler"
default y
---help---
The Kyber I/O scheduler is a low-overhead scheduler suitable for
multiqueue and other fast devices. Given target latencies for reads and
synchronous writes, it will self-tune queue depths to achieve that
goal.
config IOSCHED_BFQ
tristate "BFQ I/O scheduler"
---help---
BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of
of the device among all processes according to their weights,
regardless of the device parameters and with any workload. It
also guarantees a low latency to interactive and soft
real-time applications. Details in
Documentation/block/bfq-iosched.txt
config BFQ_GROUP_IOSCHED
bool "BFQ hierarchical scheduling support"
depends on IOSCHED_BFQ && BLK_CGROUP
---help---
Enable hierarchical scheduling in BFQ, using the blkio
(cgroups-v1) or io (cgroups-v2) controller.
endmenu
endif
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