From: David Miller
Date: Wed, 31 May 2017 11:53:35 -0400 (EDT)
> Can you try something like disabling cpu IRQs around the crc32c() function
> in lib/libcrc32c.c? Something like:
>
> u32 retval;
>
> local_irq_disable();
>
> shash->tfm = tfm;
> shash->flags = 0;
>
From: Anatoly Pugachev
Date: Wed, 31 May 2017 14:56:52 +0300
> While debugging occasional crc32c checksum errors with xfs disk reads on
> sparc64 (T5 [sun4v] 3.6 GHz CPU ldom, debian unstable/sid), Eric have found
> that crc32c sometimes returns wrong checksum for data. Eric made a simple
> test
A bit more on testing machines:
kernel on T5 ldom ttip is git kernel:
Linux ttip 4.12.0-rc3-00011-gf511c0b17b08 #327 SMP Wed May 31 12:54:02
MSK 2017 sparc64 GNU/Linux
kernel on v215 is debian sid kernel:
Linux v215 4.9.0-3-sparc64-smp #1 SMP Debian 4.9.25-1 (2017-05-02)
sparc64 GNU/Linux
mato
Hello!
While debugging occasional crc32c checksum errors with xfs disk reads on
sparc64 (T5 [sun4v] 3.6 GHz CPU ldom, debian unstable/sid), Eric have found
that crc32c sometimes returns wrong checksum for data. Eric made a simple
test kernel module (included), which produce the following results o
