Re: [PATCH][BUG] ext4: dx_map_entry cannot support over 64KB block size

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Ted-san,

Theodore Tso wrote:
> Are you aware of any patches that enable an IA64 system to support a
> page size greater than 64kB?  (And whether any customer would actually
> want to use them, given the downsides of very large page size?)  The
No, I am not. But I have considered that POWERPC system has been
supported over 64KB page size after I examined all Kconfig's in kernel
source. Therefore I thought this bug should be fixed in kernel side.

> issue is that Linux doesn't support filesystem block sizes > than the
> page size.  In any case, I don't mind adding patches that attempt to
> make it better to support large block sizes; I don't really want to
> claim that we support it until we can actually fully test for that
I think so, too.

> feature, though.  Is it your intent to actually try to provide support
> for this at some point?  I'll help you if you are, but you'll have to
> do the testing, since I don't have access to an IA64 platform that
> might be able to support these sorts of large pages.
>
> Thanks,
>
> 						- Ted
I don't think this feature (over 64KB block size support) to be necessary
immediately. Because I have been investigating ext4 for my customers
in order that I may provide them greater quality and performance but they don't
 want it now.
But when my customers want this feature, I will try to test it.

Best regards,
Toshiyuki Okajima

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