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[2003:dc:6f0e:fb00:230:64ff:fe74:809]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a6c806eb099sm118003766b.102.2024.06.06.09.42.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jun 2024 09:42:05 -0700 (PDT) From: Max Kellermann To: xiubli@redhat.com, idryomov@gmail.com, ceph-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Max Kellermann Subject: [PATCH] fs/ceph/mds_client: use cap_wait_list only if debugfs is enabled Date: Thu, 6 Jun 2024 18:41:57 +0200 Message-Id: <20240606164157.3765143-1-max.kellermann@ionos.com> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Only debugfs uses this list. By omitting it, we save some memory and reduce lock contention on `caps_list_lock`. Signed-off-by: Max Kellermann Reviewed-by: Xiubo Li --- fs/ceph/caps.c | 6 ++++++ fs/ceph/mds_client.c | 2 ++ fs/ceph/mds_client.h | 6 ++++++ 3 files changed, 14 insertions(+) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index c4941ba245ac..772879aa26ee 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -3067,10 +3067,13 @@ int __ceph_get_caps(struct inode *inode, struct cep= h_file_info *fi, int need, flags, &_got); WARN_ON_ONCE(ret =3D=3D -EAGAIN); if (!ret) { +#ifdef CONFIG_DEBUG_FS struct ceph_mds_client *mdsc =3D fsc->mdsc; struct cap_wait cw; +#endif DEFINE_WAIT_FUNC(wait, woken_wake_function); =20 +#ifdef CONFIG_DEBUG_FS cw.ino =3D ceph_ino(inode); cw.tgid =3D current->tgid; cw.need =3D need; @@ -3079,6 +3082,7 @@ int __ceph_get_caps(struct inode *inode, struct ceph_= file_info *fi, int need, spin_lock(&mdsc->caps_list_lock); list_add(&cw.list, &mdsc->cap_wait_list); spin_unlock(&mdsc->caps_list_lock); +#endif // CONFIG_DEBUG_FS =20 /* make sure used fmode not timeout */ ceph_get_fmode(ci, flags, FMODE_WAIT_BIAS); @@ -3097,9 +3101,11 @@ int __ceph_get_caps(struct inode *inode, struct ceph= _file_info *fi, int need, remove_wait_queue(&ci->i_cap_wq, &wait); ceph_put_fmode(ci, flags, FMODE_WAIT_BIAS); =20 +#ifdef CONFIG_DEBUG_FS spin_lock(&mdsc->caps_list_lock); list_del(&cw.list); spin_unlock(&mdsc->caps_list_lock); +#endif =20 if (ret =3D=3D -EAGAIN) continue; diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index c2157f6e0c69..62238f3e6e19 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -5505,7 +5505,9 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc) INIT_DELAYED_WORK(&mdsc->delayed_work, delayed_work); mdsc->last_renew_caps =3D jiffies; INIT_LIST_HEAD(&mdsc->cap_delay_list); +#ifdef CONFIG_DEBUG_FS INIT_LIST_HEAD(&mdsc->cap_wait_list); +#endif spin_lock_init(&mdsc->cap_delay_lock); INIT_LIST_HEAD(&mdsc->cap_unlink_delay_list); INIT_LIST_HEAD(&mdsc->snap_flush_list); diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index cfa18cf915a0..13dd83f783ec 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -416,6 +416,8 @@ struct ceph_quotarealm_inode { struct inode *inode; }; =20 +#ifdef CONFIG_DEBUG_FS + struct cap_wait { struct list_head list; u64 ino; @@ -424,6 +426,8 @@ struct cap_wait { int want; }; =20 +#endif // CONFIG_DEBUG_FS + enum { CEPH_MDSC_STOPPING_BEGIN =3D 1, CEPH_MDSC_STOPPING_FLUSHING =3D 2, @@ -512,7 +516,9 @@ struct ceph_mds_client { spinlock_t caps_list_lock; struct list_head caps_list; /* unused (reserved or unreserved) */ +#ifdef CONFIG_DEBUG_FS struct list_head cap_wait_list; +#endif int caps_total_count; /* total caps allocated */ int caps_use_count; /* in use */ int caps_use_max; /* max used caps */ --=20 2.39.2