lkml.org 
[lkml]   [2000]   [Oct]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: tcp.c::wait_for_tcp_memory() buggy ?
On Sun, Oct 29, 2000 at 01:28:38AM -0200, Rik van Riel wrote:
> Except for doing a test on tcp_memory_free(sk), where we
> do NOT hold the lock we're so dutifully clinging to during
> the rest of the loop...

And rechecking it later while holding the loop on the next iteration.

Also usually the caller also does a check again and iterates as needed.

>
> As I said, I can't put my finger down on what exactly is
> wrong, but this code looks subtle enough that, together
> with the bugreport I got (on IRC), I have the feeling that
> it just _can't_ be right ...

With the right setup of multiple threads writing all the time
on a single socket you could probably starve one, making it loop forever here.
(it does not try to be fair)



-Andi

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:45    [W:0.036 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site