Hi Jan,
thanks for pushing this.
I spent really a lot of time (weeks) tracking this down and finding a
solution. Digging down the depths of the operating system, while
actually writting application software. The result is the mentioned
patch. I then posted it here. I think there is approval that the fix
actually does work. Then there was starting some discussion about
implementation details, optimization and possible further problems at
other locations.
At some point I had to take a break, since this had cost me already so
much time. Sorry about that. It's to bad this is still pending.
If nothing happens I might be willing to spend another small amount of
time to help completing this. But my time is limited. I can not promise
anything.
I think this bug is quite serious. It suddenly kills programs without
asking out of nowhere. And it's patient.
By the way, my software now runs on 64-bit, so luckily I'm not affected
anymore (hopefully). But there's probably still plenty of 32-bit systems
endangered by this.
Have you seen? Keith posted a program to reproduce the bug (or confirm
that the patch works) as fast as possible:
/* cc -o nop nop.c `pkg-config --cflags --libs x11` */
#include <stdio.h>
#include <stdint.h>
#include <X11/Xlib.h>
int
main (int argc, char **argv)
{
uint64_t i = 0;
Display *dpy = XOpenDisplay(NULL);
for (;;) {
++i;
if ((i & 0xfffffff) == 0) {
XFlush(dpy);
printf ("0x%llx\n", i);
}
XNoOp(dpy);
}
}
Regards
Jonas
Am 29.07.2014 um 18:56 schrieb Jan Smout:
Hi all,
I recently stumbled into an application that crashed because of this:
https://bugs.freedesktop.org/show_bug.cgi?id=71338
and quickly found the following patch:
http://patchwork.freedesktop.org/patch/16753/
which seems to work fine (the application used to crash in less than
24 hrs. Has been running for 5 days straight with the patch).
Now my question: what is the status of this patch? Are there still
details to be clarified before it can be put into the main tree?
best regards,
Jan
--
Life is complex, it has a real part and an imaginary part.
_______________________________________________
[email protected]: X.Org development
Archives: http://lists.x.org/archives/xorg-devel
Info: http://lists.x.org/mailman/listinfo/xorg-devel
