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

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On 4/29/2020 6:14 PM, Dan Carpenter wrote:
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:
… 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 “Fixes” 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")?
Yes. Let me update it in Fixes tag in V3 and post it. Thanks for pointing it.

regards,
dan carpenter




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