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From: Chengguang Xu <cgxu519@mykernel.net>
To: "Chengguang Xu" <cgxu519@mykernel.net>
Cc: "miklos" <miklos@szeredi.hu>, "jack" <jack@suse.cz>,
	"amir73il" <amir73il@gmail.com>,
	"linux-unionfs" <linux-unionfs@vger.kernel.org>,
	"linux-fsdevel" <linux-fsdevel@vger.kernel.org>
Subject: 回复:[RFC PATCH v3 09/10] ovl: introduce helper of syncfs writeback inode waiting
Date: Mon, 09 Nov 2020 11:33:57 +0800
Message-ID: <175ab1145ed.108462b5a912.9181293177019474923@mykernel.net> (raw)
In-Reply-To: <20201108140307.1385745-10-cgxu519@mykernel.net>

 ---- 在 星期日, 2020-11-08 22:03:06 Chengguang Xu <cgxu519@mykernel.net> 撰写 ----
 > Introduce a helper ovl_wait_wb_inodes() to wait until all
 > target upper inodes finish writeback.
 > 
 > Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
 > ---
 >  fs/overlayfs/super.c | 30 ++++++++++++++++++++++++++++++
 >  1 file changed, 30 insertions(+)
 > 
 > diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
 > index e5607a908d82..9a535fc11221 100644
 > --- a/fs/overlayfs/super.c
 > +++ b/fs/overlayfs/super.c
 > @@ -255,6 +255,36 @@ static void ovl_put_super(struct super_block *sb)
 >      ovl_free_fs(ofs);
 >  }
 >  
 > +void ovl_wait_wb_inodes(struct ovl_fs *ofs)
 > +{
 > +    LIST_HEAD(tmp_list);
 > +    struct ovl_inode *oi;
 > +    struct inode *upper;
 > +
 > +    spin_lock(&ofs->syncfs_wait_list_lock);
 > +    list_splice_init(&ofs->syncfs_wait_list, &tmp_list);
 > +
 > +    while (!list_empty(&tmp_list)) {
 > +        oi = list_first_entry(&tmp_list, struct ovl_inode, wait_list);
 > +        list_del_init(&oi->wait_list);
 > +        ihold(&oi->vfs_inode);

Maybe I overlooked race condition with inode eviction, so still need to introduce
OVL_EVICT_PENDING flag just like we did in old syncfs efficiency patch series.


Thanks,
Chengguang

  reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-08 14:02 [RFC PATCH v3 00/10] implement containerized syncfs for overlayfs Chengguang Xu
2020-11-08 14:02 ` [RFC PATCH v3 01/10] ovl: setup overlayfs' private bdi Chengguang Xu
2020-11-08 14:02 ` [RFC PATCH v3 02/10] ovl: introduce waiting list for syncfs Chengguang Xu
2020-11-08 14:03 ` [RFC PATCH v3 03/10] ovl: implement ->writepages operation Chengguang Xu
2020-11-08 14:03 ` [RFC PATCH v3 04/10] ovl: implement overlayfs' ->evict_inode operation Chengguang Xu
2020-11-08 14:03 ` [RFC PATCH v3 05/10] ovl: mark overlayfs' inode dirty on modification Chengguang Xu
2020-11-08 14:03 ` [RFC PATCH v3 06/10] ovl: mark overlayfs' inode dirty on shared mmap Chengguang Xu
2020-11-11 13:05   ` 回复:[RFC " Chengguang Xu
2020-11-11 15:20     ` [RFC " Amir Goldstein
2020-11-11 16:09       ` Chengguang Xu
2020-11-08 14:03 ` [RFC PATCH v3 07/10] ovl: implement overlayfs' ->write_inode operation Chengguang Xu
2020-11-10 13:45   ` Jan Kara
2020-11-10 15:12     ` Chengguang Xu
2020-11-11 10:54       ` Jan Kara
2020-11-10 16:18     ` Amir Goldstein
2020-11-08 14:03 ` [RFC PATCH v3 08/10] ovl: cache dirty overlayfs' inode Chengguang Xu
2020-11-08 14:03 ` [RFC PATCH v3 09/10] ovl: introduce helper of syncfs writeback inode waiting Chengguang Xu
2020-11-09  3:33   ` Chengguang Xu [this message]
2020-11-09  7:07     ` Amir Goldstein
2020-11-09  8:34       ` Chengguang Xu
2020-11-09 10:07         ` Amir Goldstein
2020-11-09 12:06           ` Chengguang Xu
2020-11-08 14:03 ` [RFC PATCH v3 10/10] ovl: implement containerized syncfs for overlayfs Chengguang Xu

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