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From: Segher Boessenkool <segher@kernel.crashing.org>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mahesh Jagannath Salgaonkar <mahesh@linux.vnet.ibm.com>,
	linuxppc-dev <linuxppc-dev@ozlabs.org>,
	Laurent Dufour <ldufour@linux.vnet.ibm.com>,
	Michal Suchanek <msuchanek@suse.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	Nicholas Piggin <npiggin@gmail.com>,
	Ananth Narayan <ananth@in.ibm.com>
Subject: Re: [PATCH v7 4/9] powerpc/pseries: Define MCE error event section.
Date: Thu, 16 Aug 2018 09:44:36 -0500	[thread overview]
Message-ID: <20180816144435.GZ31204@gate.crashing.org> (raw)
In-Reply-To: <87lg97aqxc.fsf@concordia.ellerman.id.au>

Hi!

On Thu, Aug 16, 2018 at 02:14:39PM +1000, Michael Ellerman wrote:
> Mahesh Jagannath Salgaonkar <mahesh@linux.vnet.ibm.com> writes:
> > On 08/08/2018 08:12 PM, Michael Ellerman wrote:
> >>> +			uint8_t	reserved_1[6];
> >>> +			__be64	effective_address;
> >>> +			__be64	logical_address;
> >>> +		} ue_error;
> >>> +		struct {
> >>> +			uint8_t	soft_err_type;
> >>> +			/* XXXXXXXX
> >>> +			 * X		1: Effective address provided.
> >>> +			 *  XXXXX	5: Reserved.
> >>> +			 *       XX	2: Type of SLB/ERAT/TLB error.
> >>> +			 */
> >>> +			uint8_t	reserved_1[6];
> >>> +			__be64	effective_address;
> >>> +			uint8_t	reserved_2[8];
> >>> +		} soft_error;
> >>> +	} u;
> >>> +};
> >>> +#pragma pack(pop)
> >> 
> >> Why not __packed ?
> >
> > Because when used __packed it added 1 byte extra padding between
> > reserved_1[6] and effective_address. That caused wrong effective address
> > to be printed on the console. Hence I switched to #pragma pack to force
> > 1 byte alignment for this structure alone.
> 
> OK, that's weird.

Yes, if that is true, then please open a GCC bugzilla report.


Segher

  reply	other threads:[~2018-08-16 14:44 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-07 14:15 [PATCH v7 0/9] powerpc/pseries: Machine check handler improvements Mahesh J Salgaonkar
2018-08-07 14:16 ` [PATCH v7 1/9] powerpc/pseries: Avoid using the size greater than RTAS_ERROR_LOG_MAX Mahesh J Salgaonkar
2018-08-07 14:16 ` [PATCH v7 2/9] powerpc/pseries: Defer the logging of rtas error to irq work queue Mahesh J Salgaonkar
2018-08-07 14:16 ` [PATCH v7 3/9] powerpc/pseries: Fix endainness while restoring of r3 in MCE handler Mahesh J Salgaonkar
2018-08-13 11:23   ` [v7, " Michael Ellerman
2018-08-07 14:16 ` [PATCH v7 4/9] powerpc/pseries: Define MCE error event section Mahesh J Salgaonkar
2018-08-08 14:42   ` Michael Ellerman
2018-08-10 10:29     ` Mahesh Jagannath Salgaonkar
2018-08-16  4:14       ` Michael Ellerman
2018-08-16 14:44         ` Segher Boessenkool [this message]
2018-08-17 11:22         ` Mahesh Jagannath Salgaonkar
2018-08-07 14:17 ` [PATCH v7 5/9] powerpc/pseries: flush SLB contents on SLB MCE errors Mahesh J Salgaonkar
2018-08-07 16:54   ` Michal Suchánek
2018-08-10 10:30     ` Mahesh Jagannath Salgaonkar
2018-08-08  9:04   ` Nicholas Piggin
2018-08-10 10:30     ` Mahesh Jagannath Salgaonkar
2018-08-07 14:17 ` [PATCH v7 6/9] powerpc/pseries: Display machine check error details Mahesh J Salgaonkar
2018-08-07 14:17 ` [PATCH v7 7/9] powerpc/pseries: Dump the SLB contents on SLB MCE errors Mahesh J Salgaonkar
2018-08-09  1:05   ` Michael Ellerman
2018-08-10 10:32     ` Mahesh Jagannath Salgaonkar
2018-08-10 10:49       ` Mahesh Jagannath Salgaonkar
2018-08-11  4:33   ` Nicholas Piggin
2018-08-13  4:17     ` Mahesh Jagannath Salgaonkar
2018-08-13 14:27       ` Nicholas Piggin
2018-08-14 10:57         ` Mahesh Jagannath Salgaonkar
2018-08-14 12:47           ` Aneesh Kumar K.V
2018-08-07 14:17 ` [PATCH v7 8/9] powerpc/mce: Add sysctl control for recovery action on MCE Mahesh J Salgaonkar
2018-08-08 14:56   ` Michael Ellerman
2018-08-08 15:37     ` Aneesh Kumar K.V
2018-08-08 16:09       ` Michal Suchánek
2018-08-10 11:04         ` Michael Ellerman
2018-08-09  6:34       ` Michael Ellerman
2018-08-09  8:02         ` Nicholas Piggin
2018-08-09  8:09           ` Ananth N Mavinakayanahalli
2018-08-09  8:33             ` Nicholas Piggin
2018-08-09 10:26               ` Michal Suchánek
2018-08-10  7:31                 ` Nicholas Piggin
2018-08-09  1:43     ` Nicholas Piggin
2018-08-07 14:18 ` [PATCH v7 9/9] powernv/pseries: consolidate code for mce early handling Mahesh J Salgaonkar

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