<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-toradex.git/include/linux/pktcdvd.h, branch v2.6.16.15</title>
<subtitle>Linux kernel for Apalis and Colibri modules</subtitle>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/'/>
<entry>
<title>[PATCH] pktcdvd: Allow larger packets</title>
<updated>2006-02-05T19:06:52+00:00</updated>
<author>
<name>Phillip Susi</name>
<email>psusi@cfl.rr.com</email>
</author>
<published>2006-02-05T07:27:48+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=5c55ac9bbca22ee134408f83de5f2bda3b1b2a53'/>
<id>5c55ac9bbca22ee134408f83de5f2bda3b1b2a53</id>
<content type='text'>
The pktcdvd driver uses a compile time macro constant to define the maximum
supported packet length.  I changed this from 32 sectors to 128 sectors
because that allows over 100 MB of additional usable space on a 700 MB cdrw,
and increases throughput.

Note that you need a modified cdrwtool program that can format a CDRW disc
with larger packets to benefit from this change.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The pktcdvd driver uses a compile time macro constant to define the maximum
supported packet length.  I changed this from 32 sectors to 128 sectors
because that allows over 100 MB of additional usable space on a 700 MB cdrw,
and increases throughput.

Note that you need a modified cdrwtool program that can format a CDRW disc
with larger packets to benefit from this change.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>[PATCH] pktcdvd: Don't waste kernel memory</title>
<updated>2006-02-05T19:06:52+00:00</updated>
<author>
<name>Peter Osterlund</name>
<email>petero2@telia.com</email>
</author>
<published>2006-02-05T07:27:47+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=e1bc89bc9991e994f2b3c60d9ad2fdb5ad9b10fc'/>
<id>e1bc89bc9991e994f2b3c60d9ad2fdb5ad9b10fc</id>
<content type='text'>
Allocate memory for read-gathering at open time, when it is known just how
much memory is needed.  This avoids wasting kernel memory when the real packet
size is smaller than the maximum packet size supported by the driver.  This is
always the case when using DVD discs.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Allocate memory for read-gathering at open time, when it is known just how
much memory is needed.  This avoids wasting kernel memory when the real packet
size is smaller than the maximum packet size supported by the driver.  This is
always the case when using DVD discs.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>[PATCH] pktcdvd: Fix overflow for discs with large packets</title>
<updated>2006-02-05T19:06:52+00:00</updated>
<author>
<name>Phillip Susi</name>
<email>psusi@cfl.rr.com</email>
</author>
<published>2006-02-05T07:27:44+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=a460ad62260def15c42130de253d6cfc32528a2f'/>
<id>a460ad62260def15c42130de253d6cfc32528a2f</id>
<content type='text'>
The pktcdvd driver was using an 8 bit field to store the packet length
obtained from the disc track info.  This causes it to overflow packet length
values of 128KB or more.  I changed the field to 32 bits to fix this.

The pktcdvd driver defaulted to its maximum allowed packet length when it
detected a 0 in the track info field.  I changed this to fail the operation
and refuse to access the media.  This seems more sane than attempting to
access it with a value that almost certainly will not work.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The pktcdvd driver was using an 8 bit field to store the packet length
obtained from the disc track info.  This causes it to overflow packet length
values of 128KB or more.  I changed the field to 32 bits to fix this.

The pktcdvd driver defaulted to its maximum allowed packet length when it
detected a 0 in the track info field.  I changed this to fail the operation
and refuse to access the media.  This seems more sane than attempting to
access it with a value that almost certainly will not work.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>[PATCH] pktcdvd: BUG_ON cleanups</title>
<updated>2005-09-13T15:22:31+00:00</updated>
<author>
<name>Peter Osterlund</name>
<email>petero2@telia.com</email>
</author>
<published>2005-09-13T08:25:29+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=610827dee82731c7be5a135d750d194ac56881a9'/>
<id>610827dee82731c7be5a135d750d194ac56881a9</id>
<content type='text'>
Remove some redundant BUG_ON() statements in pktcdvd and move one run-time
check to compile-time.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Remove some redundant BUG_ON() statements in pktcdvd and move one run-time
check to compile-time.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>[PATCH] Improve CD/DVD packet driver write performance</title>
<updated>2005-06-23T16:45:30+00:00</updated>
<author>
<name>Peter Osterlund</name>
<email>petero2@telia.com</email>
</author>
<published>2005-06-23T07:10:02+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=46c271bedd2c8444b1d05bc44928beec0c07debc'/>
<id>46c271bedd2c8444b1d05bc44928beec0c07debc</id>
<content type='text'>
This patch improves write performance for the CD/DVD packet writing driver.
 The logic for switching between reading and writing has been changed so
that streaming writes are no longer interrupted by read requests.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
This patch improves write performance for the CD/DVD packet writing driver.
 The logic for switching between reading and writing has been changed so
that streaming writes are no longer interrupted by read requests.

Signed-off-by: Peter Osterlund &lt;petero2@telia.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@osdl.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@osdl.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Linux-2.6.12-rc2</title>
<updated>2005-04-16T22:20:36+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@ppc970.osdl.org</email>
</author>
<published>2005-04-16T22:20:36+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2'/>
<id>1da177e4c3f41524e886b7f1b8a0c1fc7321cac2</id>
<content type='text'>
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
</pre>
</div>
</content>
</entry>
</feed>
