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| /linux-master/drivers/md/ | ||
| H A D | md.c | diff c622ca54 Tue Aug 16 06:26:08 MDT 2016 Artur Paszkiewicz <artur.paszkiewicz@intel.com> md: don't print the same repeated messages about delayed sync operation This fixes a long-standing bug that caused a flood of messages like: "md: delaying data-check of md1 until md2 has finished (they share one or more physical units)" It can be reproduced like this: 1. Create at least 3 raid1 arrays on a pair of disks, each on different partitions. 2. Request a sync operation like 'check' or 'repair' on 2 arrays by writing to their md/sync_action attribute files. One operation should start and one should be delayed and a message like the above will be printed. 3. Issue a write to the third array. Each write will cause 2 copies of the message to be printed. This happens when wake_up(&resync_wait) is called, usually by md_check_recovery(). Then the delayed sync thread again prints the message and is put to sleep. This patch adds a check in md_do_sync() to prevent printing this message more than once for the same pair of devices. Reported-by: Sven Koehler <sven.koehler@gmail.com> Link: https://bugzilla.kernel.org/show_bug.cgi?id=151801 Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Signed-off-by: Shaohua Li <shli@fb.com> |
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