This is a note to let you know that I've just added the patch titled afs: Don't assert on unpurgeable server records to the 5.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: afs-don-t-assert-on-unpurgeable-server-records.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 5d15dac0c5a777ba82d14edcd4f267bdffda97f3 Author: David Howells <dhowells@xxxxxxxxxx> Date: Thu Oct 15 09:02:25 2020 +0100 afs: Don't assert on unpurgeable server records [ Upstream commit 7530d3eb3dcf1a30750e8e7f1f88b782b96b72b8 ] Don't give an assertion failure on unpurgeable afs_server records - which kills the thread - but rather emit a trace line when we are purging a record (which only happens during network namespace removal or rmmod) and print a notice of the problem. Signed-off-by: David Howells <dhowells@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/fs/afs/server.c b/fs/afs/server.c index e82e452e26124..684a2b02b9ff7 100644 --- a/fs/afs/server.c +++ b/fs/afs/server.c @@ -550,7 +550,12 @@ void afs_manage_servers(struct work_struct *work) _debug("manage %pU %u", &server->uuid, active); - ASSERTIFCMP(purging, active, ==, 0); + if (purging) { + trace_afs_server(server, atomic_read(&server->ref), + active, afs_server_trace_purging); + if (active != 0) + pr_notice("Can't purge s=%08x\n", server->debug_id); + } if (active == 0) { time64_t expire_at = server->unuse_time; diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h index 13c05e28c0b6c..342b35fc33c59 100644 --- a/include/trace/events/afs.h +++ b/include/trace/events/afs.h @@ -40,6 +40,7 @@ enum afs_server_trace { afs_server_trace_get_new_cbi, afs_server_trace_get_probe, afs_server_trace_give_up_cb, + afs_server_trace_purging, afs_server_trace_put_call, afs_server_trace_put_cbi, afs_server_trace_put_find_rsq, @@ -270,6 +271,7 @@ enum afs_cb_break_reason { EM(afs_server_trace_get_new_cbi, "GET cbi ") \ EM(afs_server_trace_get_probe, "GET probe") \ EM(afs_server_trace_give_up_cb, "giveup-cb") \ + EM(afs_server_trace_purging, "PURGE ") \ EM(afs_server_trace_put_call, "PUT call ") \ EM(afs_server_trace_put_cbi, "PUT cbi ") \ EM(afs_server_trace_put_find_rsq, "PUT f-rsq") \