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Move the NFS/RPC code away from lbolt.

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The kernel has a special wchan called `lbolt', which is triggered each
second. It doesn't seem to be used a lot and it seems pretty redundant,
because we can specify a timeout value to the *sleep() routines. In an
attempt to eventually remove lbolt, make the NFS/RPC code use a timeout
of `hz' when trying to reconnect.

Only the TTY code (not MPSAFE TTY) and the VFS syncer seem to use lbolt
now.

Reviewed by:	attilio, jhb
Approved by:	philip (mentor), alfred, dfr
This commit is contained in:
Ed Schouten 2008-07-22 21:27:22 +00:00
parent fbbc785240
commit 8c2ceafebf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=180724
5 changed files with 16 additions and 10 deletions
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2
sys/nfs4client/nfs4_socket.c
View File

@ -298,7 +298,7 @@ nfs4_request_mnt(struct nfsmount *nmp, struct mbuf *mrest, int procnum,
error = 0;
waituntil = time_second + trylater_delay;
while (time_second < waituntil)
(void) tsleep(&lbolt, PSOCK, "nqnfstry", 0);
(void) tsleep(&fake_wchan, PSOCK, "nqnfstry", hz);
trylater_delay *= nfs_backoff[trylater_cnt];
if (trylater_cnt < NFS_NBACKOFF - 1)
trylater_cnt++;

4
sys/nfs4client/nfs4_vfsops.c
View File

@ -127,6 +127,8 @@ static vfs_root_t nfs4_root;
static vfs_statfs_t nfs4_statfs;
static vfs_sync_t nfs4_sync;
static int fake_wchan;
/*
* nfs vfs operations.
*/
@ -374,7 +376,7 @@ nfs4_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
if (nmp->nm_sotype == SOCK_DGRAM) {
while (nfs4_connect(nmp)) {
printf("nfs4_decode_args: retrying connect\n");
(void)tsleep(&lbolt, PSOCK, "nfscon", 0);
(void)tsleep(&fake_wchan, PSOCK, "nfscon", hz);
}
}
}

11
sys/nfsclient/nfs_socket.c
View File

@ -81,8 +81,9 @@ static int nfs_realign_test;
static int nfs_realign_count;
static int nfs_bufpackets = 4;
static int nfs_reconnects;
static int nfs3_jukebox_delay = 10;
static int nfs_skip_wcc_data_onerr = 1;
static int nfs3_jukebox_delay = 10;
static int nfs_skip_wcc_data_onerr = 1;
static int fake_wchan;
SYSCTL_DECL(_vfs_nfs);
@ -546,7 +547,7 @@ nfs_reconnect(struct nfsreq *rep)
mtx_lock(&nmp->nm_mtx);
goto unlock_exit;
}
(void) tsleep(&lbolt, PSOCK, "nfscon", 0);
(void) tsleep(&fake_wchan, PSOCK, "nfscon", hz);
}
/*
@ -1346,7 +1347,7 @@ nfs_request(struct vnode *vp, struct mbuf *mrest, int procnum,
error = 0;
waituntil = time_second + nfs3_jukebox_delay;
while (time_second < waituntil) {
(void) tsleep(&lbolt, PSOCK, "nqnfstry", 0);
(void) tsleep(&fake_wchan, PSOCK, "nqnfstry", hz);
}
rep->r_xid = *xidp = txdr_unsigned(nfs_xid_gen());
goto tryagain;
@ -1610,7 +1611,7 @@ nfs_nmcancelreqs(nmp)
mtx_unlock(&nfs_reqq_mtx);
if (req == NULL)
return (0);
tsleep(&lbolt, PSOCK, "nfscancel", 0);
tsleep(&fake_wchan, PSOCK, "nfscancel", hz);
}
return (EBUSY);
}

4
sys/nfsclient/nfs_vfsops.c
View File

@ -117,6 +117,8 @@ static vfs_statfs_t nfs_statfs;
static vfs_sync_t nfs_sync;
static vfs_sysctl_t nfs_sysctl;
static int fake_wchan;
/*
* nfs vfs operations.
*/
@ -700,7 +702,7 @@ nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp)
if (nmp->nm_sotype == SOCK_DGRAM)
while (nfs_connect(nmp, NULL)) {
printf("nfs_args: retrying connect\n");
(void) tsleep((caddr_t)&lbolt, PSOCK, "nfscon", 0);
(void) tsleep(&fake_wchan, PSOCK, "nfscon", hz);
}
}

5
sys/rpc/rpcclnt.c
View File

@ -183,6 +183,7 @@ static u_int32_t rpcclnt_xid = 0;
static u_int32_t rpcclnt_xid_touched = 0;
struct rpcstats rpcstats;
int rpcclnt_ticks;
static int fake_wchan;
SYSCTL_NODE(_kern, OID_AUTO, rpc, CTLFLAG_RD, 0, "RPC Subsystem");
@ -597,7 +598,7 @@ rpcclnt_reconnect(rep, td)
while ((error = rpcclnt_connect(rpc, td)) != 0) {
if (error == EINTR || error == ERESTART)
RPC_RETURN(EINTR);
tsleep(&lbolt, PSOCK, "rpccon", 0);
tsleep(&fake_wchan, PSOCK, "rpccon", hz);
}
/*
@ -2003,7 +2004,7 @@ rpcclnt_cancelreqs(rpc)
splx(s);
if (task == NULL)
return (0);
tsleep(&lbolt, PSOCK, "nfscancel", 0);
tsleep(&fake_wchan, PSOCK, "nfscancel", hz);
}
return (EBUSY);
}