[Ocfs2-users] MMAP shared in OCFS2 filesystem

[Sunil Mushran]

Yes, shared writeable mmap is not yet supported on ocfs2.
We are close to nailing down this feature. Hopefully will make
it in time for the next mainline kernel check-in window (2.6.23).
If so, will be available with ocfs2 1.4.

Nuno Fernandes wrote:
> Hi,
>
> My homedir is inside an ocfs2. When i use mysql client it should create 
> a .mysql_history file with the commands i've inputted so far.
>
> The file is created but no data is recorded inside. If i do a simlink outside 
> ocfs everything is ok..
>
> I've narrowed it down to the following code:
>
> ...
> open("/home/rv/.mysql_history", O_RDWR|O_CREAT|O_TRUNC, 0600) = 3
> ftruncate(3, 13)                        = 0
> mmap(NULL, 13, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = -1 EINVAL (Invalid 
> argument)
> close(3)                                = 0
> write(1, "Bye\n", 4Bye
> )                    = 4
> exit_group(0)                           = ?
> Process 10776 detached
>
> I'm using 2.6.9-48.ELxenU with ocfs2-tools-1.2.4-1 and 
> ocfs2-2.6.9-48.ELxen-1.2.5-0.local.
>
> Any info on this?
> Thanks
> Nuno Fernandes
>
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