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NFS: Disable READ_PLUS by default 

We've been seeing failures with xfstests generic/091 and generic/263
when using READ_PLUS. I've made some progress on these issues, and the
tests fail later on but still don't pass. Let's disable READ_PLUS by
default until we can work out what is going on.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Anna Schumaker 2020-12-03 15:18:39 -05:00
parent fe8eb820e3
commit 21e31401fc
2 changed files with 10 additions and 1 deletions
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9
fs/nfs/Kconfig
View File

@ -205,3 +205,12 @@ config NFS_DISABLE_UDP_SUPPORT
Choose Y here to disable the use of NFS over UDP. NFS over UDP
on modern networks (1Gb+) can lead to data corruption caused by
fragmentation during high loads.
config NFS_V4_2_READ_PLUS
bool "NFS: Enable support for the NFSv4.2 READ_PLUS operation"
depends on NFS_V4_2
default n
help
This is intended for developers only. The READ_PLUS operation has
been shown to have issues under specific conditions and should not
be used in production.

2
fs/nfs/nfs4proc.c
View File

@ -5309,7 +5309,7 @@ static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
nfs4_read_done_cb(task, hdr);
}
#ifdef CONFIG_NFS_V4_2
#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS
static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg)
{
if (server->caps & NFS_CAP_READ_PLUS)