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Linus Torvalds Upset over Ext3 and Ext4

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Linux

Linus Torvalds, Ted Ts'o, Alan Cox, Ingo Molnar, Andrew Morton and other Linux kernel developers are embroiled in a contentious discussion over the sense -- or nonsense -- of journaling and delayed allocation before a commit in the ext3 and ext4 filesystems. Heavy words are flying.

It all started with a request for help from Jesper Krogh in one of the first responses to Torvalds's announcement March 24 of Kernel 2.6.29 on the gmane.linux.kernel mailing list. Krogh reported a significant delay when writing from cache with the ext3 filesystem, despite faster hardware and extensive RAM. Was there a way to autotune it? Ingo Molnar opined that Krogh's wait time of 10 minutes was totally unacceptable, "it is the year 2009, not 1959." His personal "pain threshold" is about one second: "the historic limit for the hung tasks check was 10 seconds, then 60 seconds."

Ted Ts'o, groundbreaking in the filesystem's development, chimed in to the forum.

rest here




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