Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()

Actually, is there any place *other* than write() to the page cache that
warrants a non-temporal store?  Network sockets with scatter/gather and
hardware checksum, maybe?

This is pretty much synonomous with what is allowed to go into high
memory, no?


While we're on the subject, for the copy_from_user source, prefetchnta is
probably indicated.  If user space hasn't caused it to be cached already
(admittedly, the common case), we *know* the kernel isn't going to look
at that data again.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()
    • From: Arjan van de Ven <[email protected]>

• Prev by Date: Re: question : any difference between "echo xxx > /dev/console" and printk
• Next by Date: Re: [-mm patch] make kcalloc() a static inline
• Previous by thread: Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()
• Next by thread: Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]