Re: [PATCH -mm 06/13] block: Increase BIO_MAX_PAGES to PMD size if THP_SWAP enabled

2017-05-25 Thread Huang, Ying
Ming Lei writes: > On Thu, May 25, 2017 at 02:46:28PM +0800, Huang, Ying wrote: >> From: Huang Ying >> >> In this patch, BIO_MAX_PAGES is changed from 256 to HPAGE_PMD_NR if >> CONFIG_THP_SWAP is enabled and HPAGE_PMD_NR > 256. This is to support >>

Re: [PATCH -mm 06/13] block: Increase BIO_MAX_PAGES to PMD size if THP_SWAP enabled

2017-05-25 Thread Huang, Ying
Ming Lei writes: > On Thu, May 25, 2017 at 02:46:28PM +0800, Huang, Ying wrote: >> From: Huang Ying >> >> In this patch, BIO_MAX_PAGES is changed from 256 to HPAGE_PMD_NR if >> CONFIG_THP_SWAP is enabled and HPAGE_PMD_NR > 256. This is to support >> THP (Transparent Huge Page) swap

Re: [PATCH -mm 06/13] block: Increase BIO_MAX_PAGES to PMD size if THP_SWAP enabled

2017-05-25 Thread Ming Lei
On Thu, May 25, 2017 at 02:46:28PM +0800, Huang, Ying wrote: > From: Huang Ying > > In this patch, BIO_MAX_PAGES is changed from 256 to HPAGE_PMD_NR if > CONFIG_THP_SWAP is enabled and HPAGE_PMD_NR > 256. This is to support > THP (Transparent Huge Page) swap optimization.

Re: [PATCH -mm 06/13] block: Increase BIO_MAX_PAGES to PMD size if THP_SWAP enabled

2017-05-25 Thread Ming Lei
On Thu, May 25, 2017 at 02:46:28PM +0800, Huang, Ying wrote: > From: Huang Ying > > In this patch, BIO_MAX_PAGES is changed from 256 to HPAGE_PMD_NR if > CONFIG_THP_SWAP is enabled and HPAGE_PMD_NR > 256. This is to support > THP (Transparent Huge Page) swap optimization. Where the THP will be

[PATCH -mm 06/13] block: Increase BIO_MAX_PAGES to PMD size if THP_SWAP enabled

2017-05-25 Thread Huang, Ying
From: Huang Ying In this patch, BIO_MAX_PAGES is changed from 256 to HPAGE_PMD_NR if CONFIG_THP_SWAP is enabled and HPAGE_PMD_NR > 256. This is to support THP (Transparent Huge Page) swap optimization. Where the THP will be write to disk as a whole instead of HPAGE_PMD_NR

[PATCH -mm 06/13] block: Increase BIO_MAX_PAGES to PMD size if THP_SWAP enabled

2017-05-25 Thread Huang, Ying
From: Huang Ying In this patch, BIO_MAX_PAGES is changed from 256 to HPAGE_PMD_NR if CONFIG_THP_SWAP is enabled and HPAGE_PMD_NR > 256. This is to support THP (Transparent Huge Page) swap optimization. Where the THP will be write to disk as a whole instead of HPAGE_PMD_NR normal pages to batch