Gentoo Archives: gentoo-user

From: Corbin Bird <corbinbird@×××××××.net>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] kernel 4.9.77 error segfault in compile.
Date: Tue, 23 Jan 2018 17:29:06
Message-Id: a36a3aff-b8c7-57da-229b-baffaf2164cf@charter.net
In Reply to: Re: [gentoo-user] kernel 4.9.77 error segfault in compile. by Alexander Kapshuk
1 > The 4.9.77 announcement upstream did introduce a number of objtool
2 > changes. See below.
3 > https://lkml.org/lkml/2018/1/17/198
4 > Josh Poimboeuf (4):
5 > objtool, modules: Discard objtool annotation sections for modules
6 > objtool: Detect jumps to retpoline thunks
7 > objtool: Allow alternatives to be ignored
8 > objtool: Fix retpoline support for pre-ORC objtool
9 >
10 > I can't seem to remember seeing reports of the issue you're having on
11 > the LMKL, since 4.9.77 was announced.
12 > As you said, try re-emerging the gentoo kernel, make mrproper, no need
13 > for distclean, which does run mrproper as part of its operation, and
14 > see if that helps.
15 > Alternatively, you could try building the upstream version of 4.9.77,
16 > and see if that works. Let me know if you need instructions on how to
17 > proceed with that.
18 >
19
20 FYI :
21 Just tried a different compile.
22 Switched off expert and flipped the CPU to "Generic x86_64" ( no other
23 changes ).
24
25 It compiled. ??????
26
27 So ... what you choose for CPU in the kernel determines if the
28 ext2/ext3/ext4 fs driver will compile.
29
30 Been using Gentoo / "sys-kernel/gentoo-sources" w/experimental for 3+
31 years now.
32 First time the CPU choice has caused a problem.
33
34 Suspect that a mismatch of the "Spectre / Meltdown" patches that have
35 somehow gotten into the ext4 fs driver and the code for specific CPUs.
36
37 Wonderful ... just finished a complete reload of Gentoo. Now have to
38 redo it again ...
39 ... the mistake? I used ext2/ext3 for the fs.
40
41 Corbin

Replies

Subject Author
Re: [gentoo-user] kernel 4.9.77 error segfault in compile. Rich Freeman <rich0@g.o>