#1 mmap-invalidate

[Rob Gjertsen]

Description:
Include mmap invalidate functionality that is necessary
when performing mmap writes with a parallel filesystem.

Status:
Submitted to project

Notes:
This kernel patch corresponds to the GPFS mmap patch
(MMAP_LINUX_PATCH) that is required for any Linux
distribution or kernel level if writes are performed
with mmapped files. To use this patch the site.mcr file
in the portability layer must be modified;
specifically, the define for MMAP_LINUX_PATCH is
uncommented under LINUX_PATCH_DEFINES. This patch has
been submitted for inclusion into the 2.5 kernel.

[Rob Gjertsen]

2.4.9 RHEL 2.1

[Rob Gjertsen]

2.4.18-27 Redhat Pro

[Rob Gjertsen]

2.4.20-18 Redhat Pro

[Rob Gjertsen]

2.4.19 SLES 8

[Rob Gjertsen]

2.6.5 SLES 9

[Rob Gjertsen]

2.4.21 SLES 8 SP3

[Rob Gjertsen]

2.4.21-9 RHEL 3.0

[Rob Gjertsen]

Logged In: YES
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Updates:
The patch is no longer necessary with SLES 9 SP1.

[Rob Gjertsen]

Logged In: YES
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To clarify, you no longer need to apply the patch if you are
using GPFS 2.3.0-2 (or higher) and using SLES9 SP1.

[Rob Gjertsen]

Logged In: YES
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Distributions not needing the patch now include:
1. SLES9 SP1 (and above)
2. RHEL4

[Rob Gjertsen]

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The standard procedure that we employ for applying a kernel
patch is:

1. "cd" to the root of the kernel source directory
(eg, cd /usr/src/linux) and copy the patch to this
directory.

2. Apply the patch via the command

patch -p1 < patch-name.patch

3. Then build and install the patched kernel according
to the instructions provided by the Linux distribution.