On Thu, 7 Apr 2005, Stas Sergeev wrote:
>
> 1. Does the "later sti" fixes the problem
> also in case of an NMI? I mean, why can't
> you just be NMI'ed before you did sti?
> NMI uses the restore_all too IIRC.
The NMI code had better be really careful, and yeah, I suspect it needs
fixing.
> 2. How can one be sure there are no more
> of the like places where the stack is left
> empty?
That's a good argument, and may be the strongest reason for _not_ doing
the speculation. However, I don't think it really can happen anywhere
else.
If people feel very nervous about the speculation, we can certainly just
make it do the two branches. It _is_ a hotspot, though, and the
optimization of the speculatiom may well be worth it.
Linus
-
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/
- References:
- crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
- Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
- Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
- Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
- Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
- Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
- Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
- Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
- Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]