Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qc0-f182.google.com ([209.85.216.182]:49893 "EHLO mail-qc0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756782Ab3BUS2q (ORCPT ); Thu, 21 Feb 2013 13:28:46 -0500 Received: by mail-qc0-f182.google.com with SMTP id k19so3740681qcs.13 for ; Thu, 21 Feb 2013 10:28:46 -0800 (PST) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH v2 2/5] nfsd: track memory utilization in the DRC Date: Thu, 21 Feb 2013 13:28:35 -0500 Message-Id: <1361471318-17971-3-git-send-email-jlayton@redhat.com> In-Reply-To: <1361471318-17971-1-git-send-email-jlayton@redhat.com> References: <1361471318-17971-1-git-send-email-jlayton@redhat.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Signed-off-by: Jeff Layton --- fs/nfsd/nfscache.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 8986568..efed50e 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -25,6 +25,7 @@ static struct list_head lru_head; static struct kmem_cache *drc_slab; static unsigned int num_drc_entries; static unsigned int max_drc_entries; +static unsigned int drc_mem_usage; static unsigned int csum_misses; /* @@ -101,11 +102,14 @@ nfsd_reply_cache_alloc(void) static void nfsd_reply_cache_free_locked(struct svc_cacherep *rp) { - if (rp->c_type == RC_REPLBUFF) + if (rp->c_type == RC_REPLBUFF && rp->c_replvec.iov_base) { + drc_mem_usage -= ksize(rp->c_replvec.iov_base); kfree(rp->c_replvec.iov_base); + } hlist_del(&rp->c_hash); list_del(&rp->c_lru); --num_drc_entries; + drc_mem_usage -= ksize(rp); kmem_cache_free(drc_slab, rp); } @@ -367,6 +371,7 @@ nfsd_cache_lookup(struct svc_rqst *rqstp) return RC_DOIT; } spin_lock(&cache_lock); + drc_mem_usage += ksize(rp); ++num_drc_entries; /* @@ -407,6 +412,7 @@ setup_entry: /* release any buffer */ if (rp->c_type == RC_REPLBUFF) { + drc_mem_usage -= ksize(rp->c_replvec.iov_base); kfree(rp->c_replvec.iov_base); rp->c_replvec.iov_base = NULL; } @@ -475,6 +481,7 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp) struct svc_cacherep *rp = rqstp->rq_cacherep; struct kvec *resv = &rqstp->rq_res.head[0], *cachv; int len; + size_t replbufsize = 0; if (!rp) return; @@ -501,6 +508,7 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp) nfsd_reply_cache_free(rp); return; } + replbufsize = ksize(cachv->iov_base); cachv->iov_len = len << 2; memcpy(cachv->iov_base, statp, len << 2); break; @@ -509,6 +517,7 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp) return; } spin_lock(&cache_lock); + drc_mem_usage += replbufsize; lru_put_end(rp); rp->c_secure = rqstp->rq_secure; rp->c_type = cachetype; -- 1.7.11.7