From: Miklos Szeredi <miklos@szeredi.hu>
To: Huang Jianan <huangjianan@oppo.com>
Cc: linux-kernel@vger.kernel.org, guoweichao@oppo.com,
zhangshiming@oppo.com, linux-fsdevel@vger.kernel.org,
linux-mm <linux-mm@kvack.org>,
"Ed Tsai (蔡宗軒)" <Ed.Tsai@mediatek.com>
Subject: Re: [fuse-devel] [PATCH] fuse: avoid deadlock when write fuse inode
Date: Wed, 24 Mar 2021 16:28:35 +0100 [thread overview]
Message-ID: <CAJfpegsbORd5hDhnth5qY1aP-6AZDMe9f9+CyWVhvpEmHPnuwQ@mail.gmail.com> (raw)
In-Reply-To: <20210202040830.26043-1-huangjianan@oppo.com>
On Tue, Feb 2, 2021 at 5:41 AM Huang Jianan via fuse-devel
<fuse-devel@lists.sourceforge.net> wrote:
>
> We found the following deadlock situations in low memory scenarios:
> Thread A Thread B
> - __writeback_single_inode
> - fuse_write_inode
> - fuse_simple_request
> - __fuse_request_send
> - request_wait_answer
> - fuse_dev_splice_read
> - fuse_copy_fill
> - __alloc_pages_direct_reclaim
> - do_shrink_slab
> - super_cache_scan
> - shrink_dentry_list
> - dentry_unlink_inode
> - iput_final
> - inode_wait_for_writeback
On what kernel are you seeing this?
I don't see how it can happen on upstream kernels, since there's a
"write_inode_now(inode, 1)" call in fuse_release() and nothing can
dirty the inode after the file has been released.
Thanks,
Miklos
next parent reply other threads:[~2021-03-24 15:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210202040830.26043-1-huangjianan@oppo.com>
2021-03-24 15:28 ` Miklos Szeredi [this message]
2022-03-10 11:10 ` [fuse-devel] [PATCH] fuse: avoid deadlock when write fuse inode Rokudo Yan
2022-04-25 13:15 ` Miklos Szeredi
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