linux-kernel - Re: [PATCH 1/1] fuse: add fuse_d

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Mon, 18 Jul 2022 15:57:17 +0200
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Ed Tsai <ed.tsai@...iatek.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        fuse-devel <fuse-devel@...ts.sourceforge.net>,
        chenguanyou <chenguanyou9338@...il.com>,
        Stanley Chu (朱原陞) 
        <stanley.chu@...iatek.com>,
        Yong-xuan Wang (王詠萱) 
        <Yong-xuan.Wang@...iatek.com>, wsd_upstream@...iatek.com
Subject: Re: [PATCH 1/1] fuse: add fuse_d_iput to postponed the iput

On Tue, 5 Jul 2022 at 10:53, Ed Tsai <ed.tsai@...iatek.com> wrote:
>
> When all the references of an inode are dropped, and write of its dirty
> pages is serving in Daemon, reclaim may deadlock on a regular allocation
> in Daemon.
>
> Add fuse_dentry_iput and some FI_* flags to postponed the iput for the
> inodes be using in fuse_write_inode.

I don't understand.

The inode must have a positive refcount during fuse_write_inode(), so
how would delaying an iput() change anything?

Thanks,
Miklos