Re: [RFC PATCH 1/5] fs: introduce notifier list for vfs inode

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On Sat, Oct 10, 2020 at 10:23:51PM +0800, Chengguang Xu wrote:
> Currently there is no notification api for kernel about modification
> of vfs inode, in some use cases like overlayfs, this kind of notification
> will be very helpful to implement containerized syncfs functionality.
> As the first attempt, we introduce marking inode dirty notification so that
> overlay's inode could mark itself dirty as well and then only sync dirty
> overlay inode while syncfs.

Who's responsible for removing the crap from notifier chain?  And how does
that affect the lifetime of inode?



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