lkml.org 
[lkml]   [2008]   [May]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/3] 64-bit futexes: x86 support


On Fri, 30 May 2008, Ulrich Drepper wrote:
>
> In any case, robbing 64-bit architectures of the possible performance
> gain just because there are ancient versions which cannot do it is just
> plain stupid. I know you cannot suggest that.

I'm suggesting that there are better approaches than forcing yet another
new interface onto this thing. As mentioned, the kernel has had 32-bit
rwsemaphores for a long time. Yes, there is "extra information" outside
the 32-bit field, but I suspect you simply haven't looked hard enough at
just using the existing futex code.

You certainly didn't even read - or understand - my emails, since you
thought I was talking about regular semaphores and ignored the "rw" part
entirely (not to mention the fact that I talked about reader counts etc,
which is why I think you didn't even read the email).

Linus


\
 
 \ /
  Last update: 2008-05-31 06:03    [W:0.067 / U:0.544 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site