Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if huge page cache enabled

From: Christoph Hellwig
Date: Wed Oct 26 2016 - 03:36:07 EST

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On Tue, Oct 25, 2016 at 03:54:31PM +0300, Kirill A. Shutemov wrote:
> The size of required pool depends on architecture: different architectures
> has different (huge page size)/(base page size).

Please explain first why they are required and not just nice to have.

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In reply to: Christoph Hellwig: "Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if huge page cache enabled"
Next in thread: Kirill A. Shutemov: "[PATCHv4 20/43] mm: make write_cache_pages() work on huge pages"
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