d10f27a750
The rpc server tries to ensure that there will be room to send a reply before it receives a request. It does this by tracking, in xpt_reserved, an upper bound on the total size of the replies that is has already committed to for the socket. Currently it is adding in the estimate for a new reply *before* it checks whether there is space available. If it finds that there is not space, it then subtracts the estimate back out. This may lead the subsequent svc_xprt_enqueue to decide that there is space after all. The results is a svc_recv() that will repeatedly return -EAGAIN, causing server threads to loop without doing any actual work. Cc: stable@vger.kernel.org Reported-by: Michael Tokarev <mjt@tls.msk.ru> Tested-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: J. Bruce Fields <bfields@redhat.com> |
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|---|---|---|
| .. | ||
| auth_gss | ||
| xprtrdma | ||
| addr.c | ||
| auth.c | ||
| auth_generic.c | ||
| auth_null.c | ||
| auth_unix.c | ||
| backchannel_rqst.c | ||
| bc_svc.c | ||
| cache.c | ||
| clnt.c | ||
| Kconfig | ||
| Makefile | ||
| netns.h | ||
| rpc_pipe.c | ||
| rpcb_clnt.c | ||
| sched.c | ||
| socklib.c | ||
| stats.c | ||
| sunrpc.h | ||
| sunrpc_syms.c | ||
| svc.c | ||
| svc_xprt.c | ||
| svcauth.c | ||
| svcauth_unix.c | ||
| svcsock.c | ||
| sysctl.c | ||
| timer.c | ||
| xdr.c | ||
| xprt.c | ||
| xprtsock.c | ||