Re: [f2fs-dev] [PATCH V2] f2fs: Avoid double lock for cp_rwsem during checkpoint

[Dan Carpenter]

On Wed, Apr 29, 2020 at 10:28:36AM +0530, Sayali Lokhande wrote:
> Hi Markus
> 
> On 4/27/2020 4:08 PM, Markus Elfring wrote:
> > > â This results in deadlock as
> > > iput() tries to hold cp_rwsem, which is already held at the
> > > beginning by checkpoint->block_operations().
> > Will another imperative wording become helpful besides the provided information
> > for this change description?
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?id=6a8b55ed4056ea5559ebe4f6a4b247f627870d4c#n151
> > 
> > Would you like to add the tag âFixesâ because of adjustments
> > for the data synchronisation?
> 
> I couldn't find any past commit which suits to be added under "Fixes" here.
> Let me know if you have any other comment.

This looks really old.  Maybe commit 399368372ed9 ("f2fs: introduce a
new global lock scheme")?

regards,
dan carpenter