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0442f14b15
linux/net/sunrpc
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J. Bruce Fields 0442f14b15 svcrpc: document lack of some memory barriers 
We're missing memory barriers in net/sunrpc/svcsock.c in some spots we'd
expect them.  But it doesn't appear they're necessary in our case, and
this is likely a hot path--for now just document the odd behavior.

Kosuke Tatsukawa found this issue while looking through the linux source
code for places calling waitqueue_active() before wake_up*(), but
without preceding memory barriers, after sending a patch to fix a
similar issue in drivers/tty/n_tty.c  (Details about the original issue
can be found here: https://lkml.org/lkml/2015/9/28/849).

Reported-by: Kosuke Tatsukawa <tatsu@ab.jp.nec.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2015-11-10 17:02:47 -05:00
..
auth_gss sunrpc: avoid warning in gss_key_timeout 2015-10-23 15:57:28 -04:00
xprtrdma svcrdma: Fix NFS server crash triggered by 1MB NFS WRITE 2015-10-12 11:55:43 -04:00
addr.c replace strict_strto calls 2014-07-12 18:45:49 -04:00
auth_generic.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
auth_null.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
auth_unix.c sunrpc: increase UNX_MAXNODENAME from 32 to __NEW_UTS_LEN bytes 2015-08-12 14:31:04 -04:00
auth.c kernel/params: constify struct kernel_param_ops uses 2015-05-28 11:32:10 +09:30
backchannel_rqst.c SUNRPC: xprt_complete_bc_request must also decrement the free slot count 2015-07-22 17:10:50 -04:00
cache.c sunrpc/cache: make cache flushing more reliable. 2015-10-23 15:57:30 -04:00
clnt.c SUNRPC: Don't reencode message if transmission failed with ENOBUFS 2015-07-03 09:42:12 -04:00
debugfs.c SUNRPC: Address kbuild warning in net/sunrpc/debugfs.c 2015-06-11 14:01:06 -04:00
Kconfig rpcrdma: Merge svcrdma and xprtrdma modules into one 2015-06-04 16:56:02 -04:00
Makefile NFS client updates for Linux 4.2 2015-07-02 11:32:23 -07:00
netns.h Merge branch 'for-3.14' of git://linux-nfs.org/~bfields/linux 2014-01-30 10:18:43 -08:00
rpc_pipe.c VFS: net/: d_inode() annotations 2015-04-15 15:06:56 -04:00
rpcb_clnt.c SUNRPC: NULL utsname dereference on NFS umount during namespace cleanup 2015-02-03 16:40:17 -05:00
sched.c NFS client bugfixes for Linux 4.3 2015-09-25 11:33:52 -07:00
socklib.c net: Save software checksum complete 2014-06-11 15:46:13 -07:00
stats.c sunrpc: add rpc_count_iostats_idx 2015-02-03 11:06:38 -08:00
sunrpc_syms.c sunrpc: make debugfs file creation failure non-fatal 2015-04-23 14:42:27 -04:00
sunrpc.h SUNRPC: track whether a request is coming from a loop-back interface. 2014-05-22 15:59:18 -04:00
svc_xprt.c nfsd/sunrpc: turn enqueueing a svc_xprt into a svc_serv operation 2015-08-10 16:05:42 -04:00
svc.c nfsd/sunrpc: factor svc_rqst allocation and freeing from sv_nrthreads refcounting 2015-08-10 16:05:44 -04:00
svcauth_unix.c svcrpc: fix failures to handle -1 uid's 2013-07-08 17:27:23 -04:00
svcauth.c nfsd4: better reservation of head space for krb5 2014-05-30 17:32:17 -04:00
svcsock.c svcrpc: document lack of some memory barriers 2015-11-10 17:02:47 -05:00
sysctl.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
timer.c
xdr.c rpc: fix xdr_truncate_encode to handle buffer ending on page boundary 2015-01-07 14:03:58 -05:00
xprt.c SUNRPC: Lock the transport layer on shutdown 2015-09-19 16:37:43 -04:00
xprtsock.c SUNRPC: Use MSG_SENDPAGE_NOTLAST when calling sendpage() 2015-10-23 15:57:27 -04:00