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Re: [RFC][PATCH 2/2] readahead: avoid page-by-page reads on POSIX_FADV_RANDOM

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From: Wu Fengguang
Subject: Re: [RFC][PATCH 2/2] readahead: avoid page-by-page reads on POSIX_FADV_RANDOM
Date: Wednesday, December 30, 2009 - 8:03 pm

On Thu, Dec 31, 2009 at 10:53:43AM +0800, Wu Fengguang wrote:


Ah it seems file->f_flags (modified under f_lock) is ideal candidate :)

Thanks,
Fengguang

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Messages in current thread:
Re: [RFC][PATCH] Disabling read-ahead makes I/O of large r ..., Wu Fengguang, (Tue Dec 29, 10:15 pm)
[RFC][PATCH 1/2] readahead: replace ra->mmap_miss with ra- ..., Wu Fengguang, (Tue Dec 29, 10:17 pm)
[RFC][PATCH 2/2] readahead: avoid page-by-page reads on PO ..., Wu Fengguang, (Tue Dec 29, 10:24 pm)
Re: [RFC][PATCH 2/2] readahead: avoid page-by-page reads o ..., Andi Kleen, (Wed Dec 30, 11:02 am)
Re: [RFC][PATCH 2/2] readahead: avoid page-by-page reads o ..., Wu Fengguang, (Wed Dec 30, 6:39 pm)
Re: [RFC][PATCH 2/2] readahead: avoid page-by-page reads o ..., Wu Fengguang, (Wed Dec 30, 7:53 pm)
Re: [RFC][PATCH 2/2] readahead: avoid page-by-page reads o ..., Wu Fengguang, (Wed Dec 30, 8:03 pm)
[RFC][PATCH v2] readahead: introduce O_RANDOM_READ for POS ..., Wu Fengguang, (Wed Dec 30, 9:31 pm)
[RFC][PATCH v3] readahead: introduce O_RANDOM for POSIX_FA ..., Wu Fengguang, (Sun Jan 3, 9:50 pm)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POSI ..., Stephen Rothwell, (Sun Jan 3, 10:17 pm)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POS ..., Minchan Kim, (Sun Jan 3, 10:20 pm)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POSI ..., Christoph Hellwig, (Mon Jan 4, 12:33 am)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POSI ..., Wu Fengguang, (Mon Jan 4, 5:16 am)
[RFC][PATCH v4] readahead: introduce O_RANDOM for POSIX_FA ..., Wu Fengguang, (Mon Jan 4, 5:56 am)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POSI ..., Quentin Barnes, (Mon Jan 4, 9:50 am)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POSI ..., Andreas Dilger, (Mon Jan 4, 11:57 am)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POS ..., Minchan Kim, (Mon Jan 4, 6:46 pm)
Re: [RFC][PATCH v4] readahead: introduce O_RANDOM for POSI ..., Stephen Rothwell, (Mon Jan 4, 7:03 pm)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POSI ..., Wu Fengguang, (Mon Jan 4, 7:16 pm)
Re: [RFC][PATCH v4] readahead: introduce O_RANDOM for POSI ..., Wu Fengguang, (Mon Jan 4, 7:26 pm)
Re: [RFC][PATCH v4] readahead: introduce O_RANDOM for POSI ..., Stephen Rothwell, (Mon Jan 4, 7:28 pm)
Re: [RFC][PATCH v4] readahead: introduce O_RANDOM for POSI ..., Wu Fengguang, (Mon Jan 4, 7:45 pm)
[RFC][PATCH v5] readahead: introduce O_RANDOM for POSIX_FA ..., Wu Fengguang, (Mon Jan 4, 8:18 pm)
Re: [RFC][PATCH v5] readahead: introduce O_RANDOM for POSI ..., Wu Fengguang, (Mon Jan 4, 8:27 pm)
Re: [RFC][PATCH v3] readahead: introduce O_RANDOM for POS ..., Minchan Kim, (Mon Jan 4, 8:40 pm)
Re: [RFC][PATCH v4] readahead: introduce O_RANDOM for POSI ..., Eric Paris, (Mon Jan 4, 10:21 pm)
Re: [RFC][PATCH v2] readahead: introduce O_RANDOM_READ for ..., Christoph Hellwig, (Fri Jan 8, 6:08 am)
Re: [RFC][PATCH v2] readahead: introduce O_RANDOM_READ for ..., Wu Fengguang, (Sat Jan 9, 6:59 am)
Re: [RFC][PATCH v2] readahead: introduce O_RANDOM_READ for ..., Wu Fengguang, (Sat Jan 9, 7:01 am)