Messages in this thread | | | Date | Fri, 4 Aug 2023 16:20:07 +0200 | Subject | Re: XFS metadata CRC errors on zram block device on ppc64le architecture | From | Hannes Reinecke <> |
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On 8/4/23 15:42, Christoph Hellwig wrote: > FYI, I've found an arm64 system with 16k page size support, and while > I can't reproduce the exact issue, I do see corruption with I/O test > on zram that don't show on the same system with 4k pages. I'm trying > to understand the details at the moment. > For some reason zram run with a logical block size of 4k:
#define ZRAM_LOGICAL_BLOCK_SHIFT 12 #define ZRAM_LOGICAL_BLOCK_SIZE (1 << ZRAM_LOGICAL_BLOCK_SHIFT)
so we'll have sub-page accesses for larger page sizes. My bet is that the issue goes away if we set the logical block size to page size ...
Cheers,
Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Ivo Totev, Andrew Myers, Andrew McDonald, Martje Boudien Moerman
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