The following reply was made to PR kern/188534; it has been noted by GNATS.
From: Yuri Zaporozhets <r_...@yahoo.co.uk>
To: bug-follo...@freebsd.org
Cc:
Subject: Re: kern/188534: Revision 262226 of /sys/dev/pci/pci.c causes kernel
hang on an Asus CUBX board
Date: Sun, 13 Apr 2014 22:26:39 +0300
Hello,
I just noticed that replacing
flags = RF_ALIGNMENT_LOG2(mapsize);
with
flags = rman_make_alignment_flags(mapsize);
fixes the problem and the kernel boots just fine.
In these two cases the values for flags are obviously very different.
Here is a table to compare (the case for my machine):
slot bad flags (buggy) new flags (fine)
------------------------------------------------
0x0 0x6800 0x1400
0x4 0x1000 0x800
0x4 0x1400 0xC00
0x4 0x1000 0x800
0x7 0xC00 0x800
0x7 0x800 0x400
0x7 0xC00 0x800
0x7 0x800 0x400
0x7 0x1000 0x800
0xA 0x3000 0x1000
0xA 0x1800 0xC00
0xA 0x4400 0x1400
0xB 0x6800 0x1400
0xD 0x3000 0x1000
0xD 0x1400 0xC00
0xD 0x5000 0x1400
If this is indeed a bug and not a design feature (I cannot be 100% sure since
I haven't read the specifications or code thoroughly), then it looks quite
serious, and presumably it may cause the crash not only on my particular
machine configuration.
--
Regards,
Yuri
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