Re: [PATCH v6 02/10] x86, mpx: add MPX specific mmap interface

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 06/23/2014 01:06 PM, Andy Lutomirski wrote:
> Can the new vm_operation "name" be use for this?  The magic "always
> written to core dumps" feature might need to be reconsidered.

One thing I'd like to avoid is an MPX vma getting merged with a non-MPX
vma.  I don't see any code to prevent two VMAs with different
vm_ops->names from getting merged.  That seems like a bit of a design
oversight for ->name.  Right?

Thinking out loud a bit... There are also some more complicated but more
performant cleanup mechanisms that I'd like to go after in the future.
Given a page, we might want to figure out if it is an MPX page or not.
I wonder if we'll ever collide with some other user of vm_ops->name.  It
looks fairly narrowly used at the moment, but would this keep us from
putting these pages on, say, a tmpfs mount?  Doesn't look that way at
the moment.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]