Messages in this thread | | | Date | Sat, 9 Jun 2007 00:12:25 -0400 | From | "Albert Cahalan" <> | Subject | Re: JIT emulator needs |
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On 6/8/07, Eric Dumazet <dada1@cosmosbay.com> wrote: > Albert Cahalan a écrit :
> > Additions to better support JIT emulators: > > > > a. sysctl to set IPC_RMID by default > > Not very good, this will break some apps.
As a sysctl, the admin gets to choose between compatibility and sanity.
I can see such a sysctl also being really helpful for a shared computer used for an Operating Systems or System Programming course.
> > b. shmget() flag to set IPC_RMID by default > > This is better :)
Both are good. This one requires that all apps using SysV shared memory be modified to use the flag. The other requires that a very few apps be modified to tolerate a behavior change.
> > c. open() flag to unlink a file before returning the fd > > > Well, I assume you would like fd = open("/path/somefile", O_RDWR | O_CREAT | > O_UNLINK, 0644) > > (ie allocate a file handle but no name ?)
Yes.
> Quite difficult to implement this atomically with current vfs, maybe a new > syscall would be better. (Linus will kill me for that :) ) > > (We dont need to insert "somefile" in one directory, then unlink it, we only > need to allocate an unnamed inode to get some backing store)
I suspect that SMB/CIFS has a native call for this. There is some sort of tmpfile flag defined over in that world. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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