Gentoo Archives: gentoo-user

From: Samuli Suominen <ssuominen@g.o>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Peeve - finding kernel config options
Date: Thu, 27 Feb 2014 19:52:00
Message-Id: 530F96AD.1010600@gentoo.org
In Reply to: Re: [gentoo-user] Peeve - finding kernel config options by Dan Johansson
1 On 27/02/14 19:24, Dan Johansson wrote:
2 > On 26.02.2014 22:24, Poison BL. wrote:
3 >> On Wed, Feb 26, 2014 at 2:58 PM, Tanstaafl <tanstaafl@×××××××××××.org> wrote:
4 >>> Hello all,
5 >>>
6 >>> This is for those of use who to choose to roll our kernels by hand...
7 >>>
8 >>> So, am I missing something?
9 >>>
10 >>> Given the most recent gentoo news item:
11 >>>
12 >>>> # eselect news read 10
13 >>>> 2014-02-25-udev-upgrade
14 >>>> Title Upgrade to >=sys-fs/udev-210
15 >>>> Author Samuli Suominen <ssuominen@g.o>
16 >>>> Posted 2014-02-25
17 >>>> Revision 1
18 >>>>
19 >>>> The options CONFIG_FHANDLE and CONFIG_NET are now required in the kernel.
20 >>>
21 >>> Whenever kernel config options are provided like this, it would be nice if
22 >>> time was taken to provide the path to where they are found.
23 >>>
24 >>> I had to find the first one (CONFIG_FHANDLE) by:
25 >>>
26 >>> 1. grepping .config, seeing it wasn't enabled,
27 >>> 2. running make menuconfig and searching for 'FHANDLE',
28 >>> 3. seeing it is located in 'General setup',
29 >>> 4. scouring the General setup options, finding no 'FHANLDE' anywhere,
30 >>> 5. finding something in all lowercase named 'open by fhanlde syscalls',
31 >>> 6. enabling this option, saving the modified config,
32 >>> 7. confirming it is now enabled by grepping .config again
33 >>>
34 >>> Sheesh. Really?
35 >>>
36 >>> Would be nice if the news item had something like
37 >>> CONFIG_FHANDLE (General setup > 'open by fhandle syscalls')
38 >>> and
39 >>> CONFIG_NET (still don't know which one this is??)
40 >>>
41 >>> Wackadoo...
42 >>>
43 >> When I search FHANDLE in menuconfig I get:
44 >>
45 >> │ Symbol: FHANDLE [=y]
46 >> │ Type : boolean
47 >> │ Prompt: open by fhandle syscalls
48 >> │ Location:
49 >> │ (1) -> General setup
50 >> │ Defined at init/Kconfig:235
51 >> │ Selects: EXPORTFS [=y]
52 >> │ Selected by: GENTOO_LINUX_INIT_SYSTEMD [=y] && GENTOO_LINUX [=y]
53 >> && GENTOO_LINUX_UDEV [=y]
54 >>
55 >> This clearly states that the prompt you're looking for is a line that
56 >> says "open by fhandle syscalls" under "General setup"
57 >>
58 >> Sure, it's not the absolute simplest interface (i.e. it doesn't give a
59 >> 'enable this' in the search results) but it does give all the
60 >> necessary information about a given option to find it (as well as
61 >> dependencies and their current states, etc). The most likely reason
62 >> the news item doesn't list the specific "prompt" text (or even the
63 >> category) is that, across even sub release versions of the kernel
64 >> those are prone to change (and, at times, drastically) while the
65 >> actual CONFIG_<name> option tends to be fairly static through time
66 >> once it exists (even when superseded by new toys, i.e. older
67 >> IDE/ATA/ATAPI options vs newer PATA options).
68 > But if you press "1" in the example above you will "jump" directly to
69 > the menu item. Clue --> (1)
70 >
71 > Regards,
72
73 Seriously, I've known / for years and have had no issues finding anything
74 myself, but this small information is still news to me.
75 Nice one.
76
77 - Samuli

Replies

Subject Author
Re: [gentoo-user] Peeve - finding kernel config options Samuli Suominen <ssuominen@g.o>