[lkml]   [2013]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: ipc,sem: sysv semaphore scalability
On Sat, Mar 30, 2013 at 12:10 PM, Linus Torvalds
<> wrote:
>> Another shot in
>> the dark, I had this weird message when trying to build gcc:
>> semop(2): encountered an error: Identifier removed
> This came from the gcc build?

yes, very early in the build process, IIRC this line was repeated a
few times and the build just stalled.

> That's just crazy. No normal app uses sysv semaphores. I have an older
> gcc build environment, and some grepping shows it has some ipc
> semaphore use in the libstdc++ testsuite, and some libmudflap hooks,
> but that should be very very minor.

> I notice that your dmesg says that your kernel is compiled by
> gcc-4.8.1 prerelease. Is there any chance that you could try to
> install a known-stable gcc, like 4.7.2 or something. It's entirely
> possible that it's a kernel bug even if it's triggered by some more
> aggressive compiler optimization or something, but it would be really
> good to try to see if this might be gcc-specific.

I could build a kernel on another machine on which 4.7.2 is installed,
kernel oops'd as well:

FWIW, I have a few things disabled in my config so here is the one I
used, maybe I'm missing something (but again, everything works
perfectly with your tree):

Lastly, just FTR, I tried Andrew's 3.9-rc4-mm1 and got the same
issues, unsurprisingly I guess.

 \ /
  Last update: 2013-03-30 07:41    [W:0.125 / U:2.968 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site