Re: [PATCHSET driver-core-next] kernfs, sysfs, driver-core:implement synchronous self-removal

From: Tejun Heo
Date: Tue Jan 07 2014 - 16:41:31 EST

On Tue, Jan 07, 2014 at 12:59:38PM -0500, Tejun Heo wrote:
> This patchset improves kernfs removal path and implements
> kernfs_remove_self() which is to be called from an on-going kernfs
> operation and removes the self node. The function can be called
> concurrently and only one will return %true and all others will wait
> until the winner's file operation is complete (not the
> kernfs_remove_self() call itself but the enclosing file operation
> which invoked the function). This ensures that if there are multiple
> concurrent "echo 1 > asdf/delete", all of them would finish only after
> the whole store_delete() method is complete.

Heh, dang it. Please ignore this posting. I thought I could get away
with this but apparently cgroup would need something a bit more
flexible. :(

I'll post an updated version later.


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