Re: [PATCH 0/8][RFC] IO latency/throughput fixes
From: Mark Lord
Date: Tue Apr 07 2009 - 09:36:06 EST
Linus Torvalds wrote:
..
- If I did this right, this _only_ overrides the data mode if it's not
explicitly specified on disk in the superblock mount options.
IOW, if you have done a
tune2fs -o journal_data_ordered
then this will _not_ override that.
..
Thanks for saving me time to look up that command! :)
With the stuff I work on here, kernel oops and sudden reboots
are not at all uncommon during development, and I really prefer
to keep "ordered" as the default on these machines for a tiny
extra margin of safety.
What happens with ext3 "writeback", and ext4 "whatever",
when one does the quickie reboot method:
ALT-SYSRQ-S ALT-SYSRQ-U ALT-SYSRQ-S ALT-SYSRQ-B
???
Cheers
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