Re: [RFC PATCH] ceph: Fix kernel crash in generic/397 test

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To: Ilya Dryomov <idryomov@xxxxxxxxx>, Viacheslav Dubeyko <Slava.Dubeyko@xxxxxxx>
Subject: Re: [RFC PATCH] ceph: Fix kernel crash in generic/397 test
From: David Howells <dhowells@xxxxxxxxxx>
Date: Fri, 17 Jan 2025 21:29:52 +0000
Cc: dhowells@xxxxxxxxxx, "ceph-devel@xxxxxxxxxxxxxxx" <ceph-devel@xxxxxxxxxxxxxxx>, Alex Markuze <amarkuze@xxxxxxxxxx>, "linux-fsdevel@xxxxxxxxxxxxxxx" <linux-fsdevel@xxxxxxxxxxxxxxx>, "slava@xxxxxxxxxxx" <slava@xxxxxxxxxxx>
In-reply-to: <CAOi1vP9jKOuBetRPZCDeUAdiOmQTYLKSSgX4YYQFt72H-t_j6A@mail.gmail.com>
Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903

Note that netfslib provides some tracepoints that you can use to try and
illuminate what's going on there.

echo 1 > /sys/kernel/debug/tracing/events/netfs/netfs_read/enable
echo 1 > /sys/kernel/debug/tracing/events/netfs/netfs_rreq/enable
echo 1 > /sys/kernel/debug/tracing/events/netfs/netfs_sreq/enable
echo 1 > /sys/kernel/debug/tracing/events/netfs/netfs_failure/enable

for starters.

David

References:
- Re: [RFC PATCH] ceph: Fix kernel crash in generic/397 test
  - From: Ilya Dryomov
- [RFC PATCH] ceph: Fix kernel crash in generic/397 test
  - From: Viacheslav Dubeyko
- Re: [RFC PATCH] ceph: Fix kernel crash in generic/397 test
  - From: Ilya Dryomov

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