lkml.org 
[lkml]   [2001]   [Sep]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Deadlock on the mm->mmap_sem
Date
> if we go generic then I strongly recommend my version of the generic
> semaphores is _much_ faster (and cleaner) than this one (it even
allows
> more than 2^31 concurrent readers on 64 bit archs ;).
>
Andrea,

implementing recursive semaphores is trivial, but do you have any idea
how to fix the latency problem?
Multithreaded, iobound apps that use mmap are unusable with unfair
semaphores.

My test app hangs for minutes within mprotect().

--
Manfred



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

\
 
 \ /
  Last update: 2005-03-22 13:03    [W:0.153 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site