Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags

[PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Theodore Ts'o <tytso@mit.edu> · 2012-04-19
[PATCH, RFC 1/3] fs: add new open flags O_HOT and O_COLD · Theodore Ts'o <tytso@mit.edu> · 2012-04-19
[PATCH, RFC 3/3] ext4: use the O_HOT and O_COLD open flags to influence inode allocation · Theodore Ts'o <tytso@mit.edu> · 2012-04-19
Re: [PATCH, RFC 3/3] ext4: use the O_HOT and O_COLD open flags to influence inode allocation · Eric Sandeen <hidden> · 2012-04-19
Re: [PATCH, RFC 3/3] ext4: use the O_HOT and O_COLD open flags to influence inode allocation · Ted Ts'o <tytso@mit.edu> · 2012-04-19
Re: [PATCH, RFC 3/3] ext4: use the O_HOT and O_COLD open flags to influence inode allocation · Andreas Dilger <hidden> · 2012-04-19
Re: [PATCH, RFC 3/3] ext4: use the O_HOT and O_COLD open flags to influence inode allocation · Dave Chinner <david@fromorbit.com> · 2012-04-19
Re: [PATCH, RFC 3/3] ext4: use the O_HOT and O_COLD open flags to influence inode allocation · Ted Ts'o <tytso@mit.edu> · 2012-04-20
Re: [PATCH, RFC 3/3] ext4: use the O_HOT and O_COLD open flags to influence inode allocation · Dave Chinner <david@fromorbit.com> · 2012-04-21
[PATCH, RFC 2/3] fs: propagate the open_flags structure down to the low-level fs's create() · Theodore Ts'o <tytso@mit.edu> · 2012-04-19
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Alex Elder <hidden> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Ted Ts'o <tytso@mit.edu> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Boaz Harrosh <hidden> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Boaz Harrosh <hidden> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Lukas Czerner <hidden> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · James Bottomley <James.Bottomley@HansenPartnership.com> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Lukas Czerner <hidden> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Christoph Lameter <hidden> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · James Bottomley <James.Bottomley@HansenPartnership.com> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Ted Ts'o <tytso@mit.edu> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · KOSAKI Motohiro <hidden> · 2012-04-21
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Nick Piggin <npiggin@gmail.com> · 2012-04-22
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · James Bottomley <James.Bottomley@HansenPartnership.com> · 2012-04-23
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Nick Piggin <npiggin@gmail.com> · 2012-04-23
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Nick Piggin <npiggin@gmail.com> · 2012-04-24
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · KOSAKI Motohiro <hidden> · 2012-04-24
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Jeff Garzik <hidden> · 2012-04-21
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Bernd Schubert <hidden> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Lukas Czerner <hidden> · 2012-04-20
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Jeff Garzik <hidden> · 2012-04-21
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Alex Elder <hidden> · 2012-04-24
Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags · Jamie Lokier <hidden> · 2012-04-24

From: Jeff Garzik <hidden>
Date: 2012-04-21 18:26:43
Also in: linux-fsdevel, linux-mm

On 04/20/2012 07:01 AM, James Bottomley wrote:

The concern I have is that the notion of hot and cold files *isn't*
propagated to the page cache, it's just shared between the fs and the
disk.

Bingo -- full-file hint is too coarse-grained for some workloads.  Page 
granularity would propagate to the VM as well as block layer, and give 
the required flexibility to all workloads.  As well as covering the 
full-file case.

	Jeff

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