The journaling daemon for the ext3 filesystem.
Questions tagged [kjournald]
4 questions
16
votes
1 answer
How do pdflush, kjournald, swapd, etc interoperate?
Recently saw a question that sparked this thought. Couldn't really find an answer here or via the Google machine. Basically, I'm interested in knowing how the kernel I/O architecture is layered. For example, does kjournald dispatch to pdflush or the…
Bratchley
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4
votes
0 answers
linux io stack analysis
I'm trying to understand the Linux IO stack by analyzing blktrace trace.
Below is the trace i captured by executing simple fio sequential write with no Direct IO (5 x 8k request size).
8,16 1 1 0.000000000 10006 U N [fio] 0
8,16 …
cheng wee
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4
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0 answers
jbd2 journal constant i/o
iotop reports a constant i/o about 3% of [jbd2/vda1-8], I think this is the journal manager for ext4.
my fstab is:
UUID=X / ext4 defaults,noatime,nodiratime 1 1
tmpfs /dev/shm tmpfs defaults,noatime,nodiratime 0 0
devpts …
zsola3075457
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2
votes
1 answer
Minimizing "idle" writes on a file system
Leaving out many details, I need to create a read/write file system on a device with the following main goals:
Eliminate all writes while data is not being explicitly written.
Reduce all indirect writes when data is written.
Run fsck on boot after…
Jason C
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