[NILFS users] nilfs crashes on 2.6.18 and 2.6.26 kernel
amrita.nayal at gmail.com
Tue Jan 13 07:22:45 JST 2009
I have been trying to gauge file systems performance on flash device
for one of my projects.
I already have numbers for ext2 and ext4 , both of them doing pretty
good for sequential IOs, but horrible when it comes to random ones.
Now I am trying to look into NILFS to figure out what performance they
can give for random IOs.
I downloaded open source software from nilfs.org. Once I start
running my fio tests the kernel crashes. And presumably this happens
when cleaner demon tries to clean the snapshots, to make space in the
Has anybody seen similar problems ?
I am able to get some numbers for sequential IOs, keeping device size
as small as 12g.
(though device spans 240g) .But w/ similar device size of 12g for
randowm write, kernel crashes almost when the test is ~20% complete.
I have also tried to update cleanerd.conf so that snapshots cleaning
is held longer, but am not able to avert it for the duration of random
write is preety long.
I would highly appreciate inputs.
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