* [RFC PATCH] ARM Fix /usr/bin/xargs: etags: Argument list too long
@ 2012-08-08 14:32 David Cullen
2012-08-08 14:41 ` Michal Marek
0 siblings, 1 reply; 3+ messages in thread
From: David Cullen @ 2012-08-08 14:32 UTC (permalink / raw)
To: mmarek, linux-kernel
Patch applies to
commit 42a579a0f960081cd16fc945036e4780c3ad3202
When running "make ARCH=arm TAGS" in a chroot using qemu-arm-static,
the following message is emitted:
[user@host:/home/work/linux]: make ARCH=arm TAGS
GEN TAGS
/usr/bin/xargs: etags: Argument list too long
This can be fixed by by passing "-L 1024" to xargs in scripts/tags.sh.
The "1024" was a guess. A value of "3862" changes the message to
/usr/bin/xargs: argument list too long
Using "2048" also fixes the problem. However, I don't know how much
headroom that leaves
Does anyone know why the argument lists must be shorter for ARM? All
of the documentation I have available says that 4096 should be the
limit.
Signed-off-by: David Cullen <david.cullen@koe-americas.com>
---
scripts/tags.sh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/tags.sh b/scripts/tags.sh
index cff8faa..7f4ebb3 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -121,7 +121,7 @@ dogtags()
exuberant()
{
- all_sources | xargs $1 -a \
+ all_sources | xargs -L 1024 $1 -a \
-I __initdata,__exitdata,__acquires,__releases \
-I __read_mostly,____cacheline_aligned \
-I ____cacheline_aligned_in_smp \
--
1.7.9.5
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [RFC PATCH] ARM Fix /usr/bin/xargs: etags: Argument list too long
2012-08-08 14:32 [RFC PATCH] ARM Fix /usr/bin/xargs: etags: Argument list too long David Cullen
@ 2012-08-08 14:41 ` Michal Marek
2012-08-08 15:59 ` David Cullen
0 siblings, 1 reply; 3+ messages in thread
From: Michal Marek @ 2012-08-08 14:41 UTC (permalink / raw)
To: David Cullen; +Cc: linux-kernel
Dne 8.8.2012 16:32, David Cullen napsal(a):
> Patch applies to
>
> commit 42a579a0f960081cd16fc945036e4780c3ad3202
>
> When running "make ARCH=arm TAGS" in a chroot using qemu-arm-static,
> the following message is emitted:
>
> [user@host:/home/work/linux]: make ARCH=arm TAGS
> GEN TAGS
> /usr/bin/xargs: etags: Argument list too long
>
> This can be fixed by by passing "-L 1024" to xargs in scripts/tags.sh.
>
> The "1024" was a guess. A value of "3862" changes the message to
>
> /usr/bin/xargs: argument list too long
>
> Using "2048" also fixes the problem. However, I don't know how much
> headroom that leaves
>
> Does anyone know why the argument lists must be shorter for ARM? All
> of the documentation I have available says that 4096 should be the
> limit.
This looks like a bug in xargs, it should make sure that the commandline
fits into ARG_MAX. BTW, a better workaround would be to use the -s
option, which limits the size of the argument list.
Michal
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [RFC PATCH] ARM Fix /usr/bin/xargs: etags: Argument list too long
2012-08-08 14:41 ` Michal Marek
@ 2012-08-08 15:59 ` David Cullen
0 siblings, 0 replies; 3+ messages in thread
From: David Cullen @ 2012-08-08 15:59 UTC (permalink / raw)
To: Michal Marek; +Cc: linux-kernel
On 8/8/2012 10:41 AM, Michal Marek wrote:
> Dne 8.8.2012 16:32, David Cullen napsal(a):
>> Patch applies to
>>
>> commit 42a579a0f960081cd16fc945036e4780c3ad3202
>>
>> When running "make ARCH=arm TAGS" in a chroot using qemu-arm-static,
>> the following message is emitted:
>>
>> [user@host:/home/work/linux]: make ARCH=arm TAGS
>> GEN TAGS
>> /usr/bin/xargs: etags: Argument list too long
>>
>> This can be fixed by by passing "-L 1024" to xargs in scripts/tags.sh.
>>
>> The "1024" was a guess. A value of "3862" changes the message to
>>
>> /usr/bin/xargs: argument list too long
>>
>> Using "2048" also fixes the problem. However, I don't know how much
>> headroom that leaves
>>
>> Does anyone know why the argument lists must be shorter for ARM? All
>> of the documentation I have available says that 4096 should be the
>> limit.
>
> This looks like a bug in xargs, it should make sure that the commandline
> fits into ARG_MAX.
Actually, it appears to be caused by the combination of
qemu-arm-static and xargs. When I run "make ARCH=arm TAGS" on an ARM
target, I do not see the problem.
> BTW, a better workaround would be to use the -s option, which
> limits the size of the argument list.
That works.
I'll submit another RFC patch.
--
Thank you,
David Cullen
^ permalink raw reply [flat|nested] 3+ messages in thread
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2012-08-08 14:32 [RFC PATCH] ARM Fix /usr/bin/xargs: etags: Argument list too long David Cullen
2012-08-08 14:41 ` Michal Marek
2012-08-08 15:59 ` David Cullen
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