From: Qi Zheng <zhengqi.arch@bytedance.com>
To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru,
vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org,
brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu,
steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org,
yujie.liu@intel.com, gregkh@linuxfoundation.org,
muchun.song@linux.dev
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org,
Qi Zheng <zhengqi.arch@bytedance.com>,
Chuck Lever <chuck.lever@oracle.com>,
Jeff Layton <jlayton@kernel.org>, Neil Brown <neilb@suse.de>,
Olga Kornievskaia <kolga@netapp.com>,
Dai Ngo <Dai.Ngo@oracle.com>, Tom Talpey <tom@talpey.com>,
linux-nfs@vger.kernel.org
Subject: [PATCH v6 33/45] nfsd: dynamically allocate the nfsd-reply shrinker
Date: Mon, 11 Sep 2023 17:44:32 +0800 [thread overview]
Message-ID: <20230911094444.68966-34-zhengqi.arch@bytedance.com> (raw)
In-Reply-To: <20230911094444.68966-1-zhengqi.arch@bytedance.com>
In preparation for implementing lockless slab shrink, use new APIs to
dynamically allocate the nfsd-reply shrinker, so that it can be freed
asynchronously via RCU. Then it doesn't need to wait for RCU read-side
critical section when releasing the struct nfsd_net.
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
CC: Neil Brown <neilb@suse.de>
CC: Olga Kornievskaia <kolga@netapp.com>
CC: Dai Ngo <Dai.Ngo@oracle.com>
CC: Tom Talpey <tom@talpey.com>
CC: linux-nfs@vger.kernel.org
---
fs/nfsd/netns.h | 2 +-
fs/nfsd/nfscache.c | 31 ++++++++++++++++---------------
2 files changed, 17 insertions(+), 16 deletions(-)
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index f669444d5336..ab303a8b77d5 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -177,7 +177,7 @@ struct nfsd_net {
/* size of cache when we saw the longest hash chain */
unsigned int longest_chain_cachesize;
- struct shrinker nfsd_reply_cache_shrinker;
+ struct shrinker *nfsd_reply_cache_shrinker;
/* tracking server-to-server copy mounts */
spinlock_t nfsd_ssc_lock;
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 80621a709510..fd56a52aa5fb 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -201,26 +201,29 @@ int nfsd_reply_cache_init(struct nfsd_net *nn)
{
unsigned int hashsize;
unsigned int i;
- int status = 0;
nn->max_drc_entries = nfsd_cache_size_limit();
atomic_set(&nn->num_drc_entries, 0);
hashsize = nfsd_hashsize(nn->max_drc_entries);
nn->maskbits = ilog2(hashsize);
- nn->nfsd_reply_cache_shrinker.scan_objects = nfsd_reply_cache_scan;
- nn->nfsd_reply_cache_shrinker.count_objects = nfsd_reply_cache_count;
- nn->nfsd_reply_cache_shrinker.seeks = 1;
- status = register_shrinker(&nn->nfsd_reply_cache_shrinker,
- "nfsd-reply:%s", nn->nfsd_name);
- if (status)
- return status;
-
nn->drc_hashtbl = kvzalloc(array_size(hashsize,
sizeof(*nn->drc_hashtbl)), GFP_KERNEL);
if (!nn->drc_hashtbl)
+ return -ENOMEM;
+
+ nn->nfsd_reply_cache_shrinker = shrinker_alloc(0, "nfsd-reply:%s",
+ nn->nfsd_name);
+ if (!nn->nfsd_reply_cache_shrinker)
goto out_shrinker;
+ nn->nfsd_reply_cache_shrinker->scan_objects = nfsd_reply_cache_scan;
+ nn->nfsd_reply_cache_shrinker->count_objects = nfsd_reply_cache_count;
+ nn->nfsd_reply_cache_shrinker->seeks = 1;
+ nn->nfsd_reply_cache_shrinker->private_data = nn;
+
+ shrinker_register(nn->nfsd_reply_cache_shrinker);
+
for (i = 0; i < hashsize; i++) {
INIT_LIST_HEAD(&nn->drc_hashtbl[i].lru_head);
spin_lock_init(&nn->drc_hashtbl[i].cache_lock);
@@ -229,7 +232,7 @@ int nfsd_reply_cache_init(struct nfsd_net *nn)
return 0;
out_shrinker:
- unregister_shrinker(&nn->nfsd_reply_cache_shrinker);
+ kvfree(nn->drc_hashtbl);
printk(KERN_ERR "nfsd: failed to allocate reply cache\n");
return -ENOMEM;
}
@@ -239,7 +242,7 @@ void nfsd_reply_cache_shutdown(struct nfsd_net *nn)
struct nfsd_cacherep *rp;
unsigned int i;
- unregister_shrinker(&nn->nfsd_reply_cache_shrinker);
+ shrinker_free(nn->nfsd_reply_cache_shrinker);
for (i = 0; i < nn->drc_hashsize; i++) {
struct list_head *head = &nn->drc_hashtbl[i].lru_head;
@@ -323,8 +326,7 @@ nfsd_prune_bucket_locked(struct nfsd_net *nn, struct nfsd_drc_bucket *b,
static unsigned long
nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc)
{
- struct nfsd_net *nn = container_of(shrink,
- struct nfsd_net, nfsd_reply_cache_shrinker);
+ struct nfsd_net *nn = shrink->private_data;
return atomic_read(&nn->num_drc_entries);
}
@@ -343,8 +345,7 @@ nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc)
static unsigned long
nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc)
{
- struct nfsd_net *nn = container_of(shrink,
- struct nfsd_net, nfsd_reply_cache_shrinker);
+ struct nfsd_net *nn = shrink->private_data;
unsigned long freed = 0;
LIST_HEAD(dispose);
unsigned int i;
--
2.30.2
next prev parent reply other threads:[~2023-09-11 9:50 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-11 9:43 [PATCH v6 00/45] use refcount+RCU method to implement lockless slab shrink Qi Zheng
2023-09-11 9:44 ` [PATCH v6 01/45] mm: shrinker: add infrastructure for dynamically allocating shrinker Qi Zheng
2023-09-18 9:03 ` Muchun Song
2023-09-18 12:06 ` Qi Zheng
2023-09-19 2:36 ` Muchun Song
2023-09-19 2:46 ` [PATCH] mm: shrinker: some cleanup Qi Zheng
2023-09-19 8:04 ` Greg KH
2023-09-19 8:41 ` Qi Zheng
2023-09-11 9:44 ` [PATCH v6 02/45] kvm: mmu: dynamically allocate the x86-mmu shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 03/45] binder: dynamically allocate the android-binder shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 04/45] drm/ttm: dynamically allocate the drm-ttm_pool shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 05/45] xenbus/backend: dynamically allocate the xen-backend shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 06/45] erofs: dynamically allocate the erofs-shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 07/45] f2fs: dynamically allocate the f2fs-shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 08/45] gfs2: dynamically allocate the gfs2-glock shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 09/45] gfs2: dynamically allocate the gfs2-qd shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 10/45] NFSv4.2: dynamically allocate the nfs-xattr shrinkers Qi Zheng
2023-09-11 9:44 ` [PATCH v6 11/45] nfs: dynamically allocate the nfs-acl shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 12/45] nfsd: dynamically allocate the nfsd-filecache shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 13/45] quota: dynamically allocate the dquota-cache shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 14/45] ubifs: dynamically allocate the ubifs-slab shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 15/45] rcu: dynamically allocate the rcu-lazy shrinker Qi Zheng
2023-09-18 7:27 ` Muchun Song
2023-09-11 9:44 ` [PATCH v6 16/45] rcu: dynamically allocate the rcu-kfree shrinker Qi Zheng
2023-09-12 7:30 ` Uladzislau Rezki
2023-09-11 9:44 ` [PATCH v6 17/45] mm: thp: dynamically allocate the thp-related shrinkers Qi Zheng
2023-09-11 9:44 ` [PATCH v6 18/45] sunrpc: dynamically allocate the sunrpc_cred shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 19/45] mm: workingset: dynamically allocate the mm-shadow shrinker Qi Zheng
2023-09-18 7:26 ` Muchun Song
2023-09-11 9:44 ` [PATCH v6 20/45] drm/i915: dynamically allocate the i915_gem_mm shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 21/45] drm/msm: dynamically allocate the drm-msm_gem shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 22/45] drm/panfrost: dynamically allocate the drm-panfrost shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 23/45] dm: dynamically allocate the dm-bufio shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 24/45] dm zoned: dynamically allocate the dm-zoned-meta shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 25/45] md/raid5: dynamically allocate the md-raid5 shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 26/45] bcache: dynamically allocate the md-bcache shrinker Qi Zheng
2023-09-18 7:24 ` Muchun Song
2023-09-11 9:44 ` [PATCH v6 27/45] vmw_balloon: dynamically allocate the vmw-balloon shrinker Qi Zheng
2023-09-11 18:40 ` Nadav Amit
2023-09-11 9:44 ` [PATCH v6 28/45] virtio_balloon: dynamically allocate the virtio-balloon shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 29/45] mbcache: dynamically allocate the mbcache shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 30/45] ext4: dynamically allocate the ext4-es shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 31/45] jbd2,ext4: dynamically allocate the jbd2-journal shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 32/45] nfsd: dynamically allocate the nfsd-client shrinker Qi Zheng
2023-09-11 9:44 ` Qi Zheng [this message]
2023-09-18 7:21 ` [PATCH v6 33/45] nfsd: dynamically allocate the nfsd-reply shrinker Muchun Song
2023-09-11 9:44 ` [PATCH v6 34/45] xfs: dynamically allocate the xfs-buf shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 35/45] xfs: dynamically allocate the xfs-inodegc shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 36/45] xfs: dynamically allocate the xfs-qm shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 37/45] zsmalloc: dynamically allocate the mm-zspool shrinker Qi Zheng
2023-09-11 9:44 ` [PATCH v6 38/45] fs: super: dynamically allocate the s_shrink Qi Zheng
2023-09-13 17:03 ` David Sterba
2023-09-11 9:44 ` [PATCH v6 39/45] mm: shrinker: remove old APIs Qi Zheng
2023-09-11 9:44 ` [PATCH v6 40/45] mm: shrinker: add a secondary array for shrinker_info::{map, nr_deferred} Qi Zheng
2023-09-28 14:15 ` [PATCH] fixup: " Qi Zheng
2023-09-28 14:17 ` Qi Zheng
2023-09-11 9:44 ` [PATCH v6 41/45] mm: shrinker: rename {prealloc|unregister}_memcg_shrinker() to shrinker_memcg_{alloc|remove}() Qi Zheng
2023-09-18 7:20 ` Muchun Song
2023-09-11 9:44 ` [PATCH v6 42/45] mm: shrinker: make global slab shrink lockless Qi Zheng
2023-12-06 7:47 ` Lai Jiangshan
2023-12-06 7:55 ` Qi Zheng
2023-12-06 8:10 ` Lai Jiangshan
2023-12-06 8:23 ` Lai Jiangshan
2023-12-06 8:37 ` Qi Zheng
2023-12-06 9:13 ` Dave Chinner
2023-09-11 9:44 ` [PATCH v6 43/45] mm: shrinker: make memcg " Qi Zheng
2023-09-11 9:44 ` [PATCH v6 44/45] mm: shrinker: hold write lock to reparent shrinker nr_deferred Qi Zheng
2023-09-18 7:17 ` Muchun Song
2023-09-11 9:44 ` [PATCH v6 45/45] mm: shrinker: convert shrinker_rwsem to mutex Qi Zheng
2023-09-18 7:16 ` Muchun Song
2023-11-26 14:27 ` [PATCH v6 00/45] use refcount+RCU method to implement lockless slab shrink Ryan Lahfa
2023-11-27 13:53 ` Greg KH
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230911094444.68966-34-zhengqi.arch@bytedance.com \
--to=zhengqi.arch@bytedance.com \
--cc=Dai.Ngo@oracle.com \
--cc=akpm@linux-foundation.org \
--cc=brauner@kernel.org \
--cc=cel@kernel.org \
--cc=chuck.lever@oracle.com \
--cc=david@fromorbit.com \
--cc=djwong@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=jlayton@kernel.org \
--cc=kolga@netapp.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-nfs@vger.kernel.org \
--cc=muchun.song@linux.dev \
--cc=neilb@suse.de \
--cc=paulmck@kernel.org \
--cc=roman.gushchin@linux.dev \
--cc=senozhatsky@chromium.org \
--cc=steven.price@arm.com \
--cc=tkhai@ya.ru \
--cc=tom@talpey.com \
--cc=tytso@mit.edu \
--cc=vbabka@suse.cz \
--cc=yujie.liu@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox