Messages in this thread | | | Date | Wed, 18 Dec 1996 11:22:44 +0100 (MET) | From | Ingo Molnar <> | Subject | buffer cache question, complex IO requests. |
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Hello buffer cache experts :)
in our (soon to come) RAID1 and RAID[45] code we have the following problem: The current ll_rw_block() logic ensures that a dirty buffer is marked clean and the IO request is put into the global block IO request queue always atomically.
Is it a problem if a process sleeps after it has marked a buffer clean, but hasnt issued the IO operation into the global queue yet? As far as i could check, bdflush doesnt deal with such buffers, it's on the BUF_LOCKED list. Could other races be possible?
thanks in advance,
-- mingo
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