Re: [PERFORM] Disable-spinlocks while compiling postgres 9.1 for ARM Cortex A8

Hi Tom,

I tried to apply the patch. I succeeded in patching configure, configure.in and src/include/pg_config.h.in files.
But while applying the patch for src/include/storage/s_lock.h , I am getting an error.

This is how I am doing the patch,
1. I copied the diff output given in the link mentioned in the below email.
2. Changed the file names appropriately (patch file path is different from source file path. But I have initialized --- and +++ appropriately
3. Executed the patch command in the Postgres 9.1.1 directory as "patch src/include/storage/s_lock.h -i s_lock.h_Patch"
4. Got the following output
Hunk #1 succeeded at 252 with fuzz 1.
Hunk #2 FAILED at 292.
1 out of 2 hunks FAILED -- saving rejects to file src/include/storage/s_lock.h.rej

Thought of doing the failed patch manually. But couldn't understand what to do.

Please let me know what I am doing wrong and what I should be doing.

Thanks and Regards
Jayashankar

-----Original Message-----
From: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us]
Sent: 24 February 2012 AM 09:20
To: Jayashankar K B
Cc: pgsql-general(at)postgresql(dot)org; pgsql-performance(at)postgresql(dot)org
Subject: Re: [PERFORM] Disable-spinlocks while compiling postgres 9.1 for ARM Cortex A8

Jayashankar K B <Jayashankar(dot)KB(at)lnties(dot)com<mailto:Jayashankar(dot)KB(at)lnties(dot)com>> writes:
> Hi All,
> I am trying to compile Postgres Source code for ARM cortex A8 architecture.
> While compiling, I got an error message which read "selected processor does not support `swpb r4,r4,[r3]' "
> One of the Postgres forums at the location "http://postgresql.1045698.n5.nabble.com/BUG-6331-Cross-compile-error-aborts-Works-if-disable-spinlock-is-used-td5068738.html"
> Mentioned that by using -disable-spinlocks, we can overcome the error at the cost of performance. I did the same and it compiled successfully.
> But the INSTALL guide in Postgres source code mentioned that I should inform the Postgres community in case I am forced to use -disable spinlocks to let the code compile.
> Hence this email. So please suggest me what I should do now.

Try this patch:
http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=068e08eebbb2204f525647daad3fe15063b77820

BTW, please don't cross-post to multiple PG mailing lists; there's very seldom a good reason to do that.

regards, tom lane

Larsen & Toubro Limited

www.larsentoubro.com

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