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| author |   Chuck Lever <chuck.lever@oracle.com> | 2022-01-25 10:17:59 -0500 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2022-02-28 10:26:39 -0500 |
| commit | a9ff2e99e9fa501ec965da03c18a5422b37a2f44 (patch) | |
| tree | 0d9598fc3eda25fa163c5ddc07bae3c99e83e98c /fs/nfs/callback.c | |
| parent | SUNRPC: Record endpoint information in trace log (diff) | |
| download | linux-dev-a9ff2e99e9fa501ec965da03c18a5422b37a2f44.tar.xz linux-dev-a9ff2e99e9fa501ec965da03c18a5422b37a2f44.zip | |
SUNRPC: Remove the .svo_enqueue_xprt method
We have never been able to track down and address the underlying
cause of the performance issues with workqueue-based service
support. svo_enqueue_xprt is called multiple times per RPC, so
it adds instruction path length, but always ends up at the same
function: svc_xprt_do_enqueue(). We do not anticipate needing
this flexibility for dynamic nfsd thread management support.
As a micro-optimization, remove .svo_enqueue_xprt because
Spectre/Meltdown makes virtual function calls more costly.
This change essentially reverts commit b9e13cdfac70 ("nfsd/sunrpc:
turn enqueueing a svc_xprt into a svc_serv operation").
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfs/callback.c')
| -rw-r--r-- | fs/nfs/callback.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index 054cc1255fac..7a810f885063 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -234,13 +234,11 @@ err_bind: static const struct svc_serv_ops nfs40_cb_sv_ops = { .svo_function = nfs4_callback_svc, - .svo_enqueue_xprt = svc_xprt_do_enqueue, .svo_module = THIS_MODULE, }; #if defined(CONFIG_NFS_V4_1) static const struct svc_serv_ops nfs41_cb_sv_ops = { .svo_function = nfs41_callback_svc, - .svo_enqueue_xprt = svc_xprt_do_enqueue, .svo_module = THIS_MODULE, }; |