Hi, I've come across a bug when using the RT patch in Fedora 8 (CCRMA
kernel derivative): When I suspend, I get a "BUG: sleeping function
called from invalid context pm-suspend" message. After resuming, I see a
memory leak that can rapidly eat memory just by doing this in BASH:
"while /bin/true; do continue; done". The system will slow and then
finally lock up with "free" reporting approx. 1 GB left (on a 2 GB
system).
This has been seen on both the Intel D510MO motherboard and the Intel
DQ35JOE board. I have tried the CCRMA kernel
2.6.33.4-106.rt20.1.fc13.ccrma.i686.rtPAE and a custom kernel based off
the 2.6.24.3-1 CCRMA kernel. Versions of the kernel without the rt patch
do not fail (tried the stock FC8 kernel and stock FC11 kernel).
Here is a snippit of the backtrace I get:
kernel: BUG: sleeping function called from invalid context
pm-suspend(14941) at kernel/rtmutex.c:638
kernel: in_atomic():1 [00000001], irqs_disabled():1
kernel: Pid: 14941, comm: pm-suspend Not tainted
2.6.24.3-1.rec15.rt1.fc8rt #1
kernel: [<c0699de1>] __rt_spin_lock+0x21/0x5e
kernel: [<c04898ce>] kfree+0x29/0x88
kernel: [<c0427be5>] rq_attach_root+0x5b/0xac
kernel: [<c042a2df>] cpu_attach_domain+0x2af/0x2ef
kernel: [<c0489929>] kfree+0x84/0x88
kernel: [<c0489929>] kfree+0x84/0x88
kernel: [<c042a33f>] detach_destroy_domains+0x20/0x33
The line number in question is:
/* Temporary HACK! */
if (!current->in_printk)
might_sleep(); <--- line 638
I've found similar threads before, but did not see a resolution to this
problem on the x86 architecture (it looks like a similar problem might
have been solved on ARM..?).
Thanks for your help,
Louis
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