From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Simmons Date: Tue, 25 Sep 2018 22:47:54 -0400 Subject: [lustre-devel] [PATCH 02/25] lustre: lnet: Allow min stats to be reset in peers and nis In-Reply-To: <1537930097-11624-1-git-send-email-jsimmons@infradead.org> References: <1537930097-11624-1-git-send-email-jsimmons@infradead.org> Message-ID: <1537930097-11624-3-git-send-email-jsimmons@infradead.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org From: Doug Oucharek Allow writes to the peers and nis LNet procfs files to reset the mininum stat columns. Signed-off-by: Doug Oucharek WC-bug-id: https://jira.whamcloud.com/browse/LU-7214 Reviewed-on: https://review.whamcloud.com/20470 Reviewed-by: Olaf Weber Reviewed-by: Amir Shehata Reviewed-by: Oleg Drokin Signed-off-by: James Simmons --- drivers/staging/lustre/lnet/lnet/router_proc.c | 69 +++++++++++++++++++++++--- 1 file changed, 62 insertions(+), 7 deletions(-) diff --git a/drivers/staging/lustre/lnet/lnet/router_proc.c b/drivers/staging/lustre/lnet/lnet/router_proc.c index a887ca4..4ddd35b 100644 --- a/drivers/staging/lustre/lnet/lnet/router_proc.c +++ b/drivers/staging/lustre/lnet/lnet/router_proc.c @@ -393,7 +393,7 @@ static int proc_lnet_peers(struct ctl_table *table, int write, { const int tmpsiz = 256; struct lnet_peer_table *ptable; - char *tmpstr; + char *tmpstr = NULL; char *s; int cpt = LNET_PROC_CPT_GET(*ppos); int ver = LNET_PROC_VER_GET(*ppos); @@ -402,12 +402,33 @@ static int proc_lnet_peers(struct ctl_table *table, int write, int rc = 0; int len; - BUILD_BUG_ON(LNET_PROC_HASH_BITS < LNET_PEER_HASH_BITS); - LASSERT(!write); + if (write) { + struct lnet_peer_ni *peer; + int i; + + cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) { + lnet_net_lock(i); + for (hash = 0; hash < LNET_PEER_HASH_SIZE; hash++) { + list_for_each_entry(peer, + &ptable->pt_hash[hash], + lpni_hashlist) { + peer->lpni_mintxcredits = + peer->lpni_txcredits; + peer->lpni_minrtrcredits = + peer->lpni_rtrcredits; + } + } + lnet_net_unlock(i); + } + *ppos += *lenp; + return 0; + } if (!*lenp) return 0; + BUILD_BUG_ON(LNET_PROC_HASH_BITS < LNET_PEER_HASH_BITS); + if (cpt >= LNET_CPT_NUMBER) { *lenp = 0; return 0; @@ -627,11 +648,45 @@ static int proc_lnet_nis(struct ctl_table *table, int write, char *s; int len; - LASSERT(!write); - if (!*lenp) return 0; + if (write) { + /* Just reset the min stat. */ + struct lnet_net *net; + struct lnet_ni *ni; + + lnet_net_lock(0); + + list_for_each_entry(net, &the_lnet.ln_nets, net_list) { + list_for_each_entry(ni, &net->net_ni_list, ni_netlist) { + struct lnet_tx_queue *tq; + int i; + int j; + + cfs_percpt_for_each(tq, i, ni->ni_tx_queues) { + for (j = 0; ni->ni_cpts && + j < ni->ni_ncpts; j++) { + if (i == ni->ni_cpts[j]) + break; + } + + if (j == ni->ni_ncpts) + continue; + + if (i != 0) + lnet_net_lock(i); + tq->tq_credits_min = tq->tq_credits; + if (i != 0) + lnet_net_unlock(i); + } + } + } + lnet_net_unlock(0); + *ppos += *lenp; + return 0; + } + tmpstr = kvmalloc(tmpsiz, GFP_KERNEL); if (!tmpstr) return -ENOMEM; @@ -847,7 +902,7 @@ static int proc_lnet_portal_rotor(struct ctl_table *table, int write, }, { .procname = "peers", - .mode = 0444, + .mode = 0644, .proc_handler = &proc_lnet_peers, }, { @@ -857,7 +912,7 @@ static int proc_lnet_portal_rotor(struct ctl_table *table, int write, }, { .procname = "nis", - .mode = 0444, + .mode = 0644, .proc_handler = &proc_lnet_nis, }, { -- 1.8.3.1