Messages in this thread |  | | Subject | Re: [2.5.70] possible problem with /dev/diskstats | Date | Sun, 01 Jun 2003 21:23:11 -0700 | From | Rick Lindsley <> |
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I've done some disk-io (compiled some software) and the values now are even lower:
Interesting, yes, you now have 60 fewer "I/O's in flight."
Where exactly is the code in the kernel, that produces the diskstats file, so I can try grepping through it?
The I/O's in flight are incremented in drive_stat_acct() (see ll_rw_blk.c) and decremented in attempt_merge() and end_that_request_last(). My gut feel is that end_that_request_last() is getting called more often than expected via some interesting path, but I've nothing right now to back that up.
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