Re: [PATCH] scsi: target: Fix recursive locking in __configfs_open_file()

Prithvi
2026-01-21T18:08:25Z

On Wed, Jan 21, 2026 at 09:59:49AM -0800, Bart Van Assche wrote:
> On 1/21/26 9:51 AM, Prithvi wrote:
> > I tried using lockdep_register_key() and lockdep_unregister_key() for the
> > frag_sem lock, however it stil gives the possible recursive locking
> > warning. Here is the patch and the bug report from its test:
> >
> > https://lore.kernel.org/all/6767d8ea.050a0220.226966.0021.GAE@google.com/T/#m3203ceddf3423b7116ba9225d182771608f93a6f
> >
> > Would using down_read_nested() and subclasses be a better option here?
> >
> > I also checked out some documentation regarding it and learnt that to use
> > the _nested() form, the hierarchy among the locks should be mapped
> > accurately; however, IIUC, there isn't any hierarchy between the locks in
> > this case, is this right?
> >
> > Apologies if I am missing something obvious here, and thanks for your
> > time and guidance.
>
> This is unexpected. Please ask help from someone who is familiar with VFS
> internals. I'm not familiar with these internals.
>
> Thanks,
>
> Bart.

Sure, no problem...thank you very much for your time and guidance :)

Best regards,
Prithvi