[PATCH 0/2] fix crash by reading /proc/diskstats

From: Daniel Wagner
Date: Thu Jan 20 2022 - 05:53:01 EST


During failover nvme-tcp tests in a HA setup a crash orccured. iostat
was running in the background while the test was executed.

I am not sure if the fix is correct. I am unsure if using
blk_queue_enter() is the right thing. But when starring at the code
snipped I saw in older version blk_queue_enter() was used but got
evenutally replaced by the rcu_read_lock() as far I understand at the
moment... So any tip here would be highly appreciated.

Daniel

Daniel Wagner (2):
block: remove commented out code from diskstats_show
block: hold queue lock while iterating in diskstats_show

block/genhd.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)

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2.29.2