Messages in this thread | | | Date | Mon, 14 Apr 2003 16:39:42 -0400 | From | Chris Friesen <> | Subject | Re: Memory mapped files question |
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H. Peter Anvin wrote: > Followup to: <11640000.1050332688@[10.10.2.4]> By author: "Martin J. > Bligh" <mbligh@aracnet.com> In newsgroup: linux.dev.kernel > >>> Martin, something which was not mentioned last week (I've just checked). >>> >>> It's OK if we never write to disk unless explicitely told, but will we >>> writeback when we munmap?
> munmap() and fsync() or msync() will flush it to disk; there is no reason > munmap() should unless perhaps the file was opened O_SYNC.
Wait a minute. Shouldn't a file opened O_SYNC flush the writes as they happen, removing the requirement for any explicit syncing? If it doesn't there are some very broken apps around.
Chris
-- Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com
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