In both 2.4 and in 2.6, error handling for bad cdrom media is
wrong.  And it is my fault I'm afraid, since I botched an earlier
fix for the problem by putting the fix in the wrong spot.

My kids have a "Jumpstart Toddlers" cd they have long since
completely killed, which makes a great test disc.  Without this
fix, the best time projection I can get for completing a dd type
sector copy is about 2 years...  Most of that is spent thrashing
about in kernel space trying to re-read sectors we already know
are not correctable....  After the fix, I was able to rip a copy
the CD (or rather muddle through it getting lots of EIO errors)
in about 15 minutes.

Attached is the fix for 2.6.x,

of requiring users to select SCSI in order to see it.

into fys.uio.no:/home/linux/bitkeeper/nfsclient-2.5

From Christoph Hellwig

From David Mosberger:

> We definitely are seeing some strange crashes in get_ksymbol_core().
> I think the reason is the lack of iterator initialization.

Yes, looks good: reset the iterator at allocation.

Remove the PCMCIA release timer that got missed in earlier patch.  This
is required for successful compilation of the driver.

into fys.uio.no:/home/linux/bitkeeper/nfsclient-2.5

nfsroot_mount().

Problem analysis and fix provided by Andries Brouwer.
Cleanup of nfs_lookup() by me...

o inline assembler funcs cleanup
o machine depend header cleanup
o interrupt management fix

o build script update
o interrupt management fix
o mtd support fix
o signal handling fix

into home.osdl.org:/home/torvalds/v2.5/linux

into home.osdl.org:/home/torvalds/v2.5/linux

a valid SEP bit. The errata has it right: you have to have at
least model 3, stepping 3. Not "model >= 3 or stepping >= 3".

Fix the test accordingly.

into camp4.serpentine.com:/export/bos/bk/linux-early

into fys.uio.no:/home/linux/bitkeeper/nfsclient-2.5

ESTALE errors.

resent since you don't know whether the server is replying to the
first or the second transmission. However we're currently setting
the cutoff point to be the timeout of the first transmission.

This patch moves the cutoff point to the actual start of the
retransmission.

in line with what is done for TCP.

Signedness corrections when updating RTT.

Be conservative when calculating RTO. Round up the residues.

among other things, for the "soft" mount option.

that call_encode() may cause rq_rcv_buf to be reset despite the fact
that a reply might be delivered at any moment by a softirq.
   
This typically results in 'NFS: server cheating in read reply'
error messages.   

Solve by adding rq_private_buf, which is updated atomically from
rq_rcv_buf.

   - Ensure that we reset req->rq_received before resending if the
     server has sent us a garbage reply.

   - Whenever we grab the xprt_lock_write "semaphore" ensure that we
     reset req->rq_bytes_sent.

   - When resending a TCP request, do not interrupt in the
     middle of transmission even if we do get a reply from the server.

   - Protect the call to rpc_calc_rto() against modification while
     we are calculating

into home.osdl.org:/home/torvalds/v2.5/linux

Fix APIC ID lookup.  In the bios_cpu_apicid[] case, it would walk off
the end of bios_cpu_apicid[] and attempt to send APIC INIT messages to
garbage without this patch, and in the NUMA-Q case, it would attempt to
send NMI wakeups to destinations in the broadcast cluster (which is
harmless, but very poor form) without this patch.

The MSRs might change between CPU models, error out if we haven't met
the CPU before. From Venkatesh Pallipadi

Add a stat counting the (relatively common) case where a PC value is logged
but there is no (longer) any executable mapping covering that address.

Tell user-space how big kernel pointers are, as preferable to sniffing /proc/kcore.
Improve the oprofilefs_ulong_to_user() prototype.

Andi Kleen pointed out the MSRs array was a massive bloat source. Reduce
it somewhat by only allocating the amount actually needed for the CPU type.

Untested on Pentium IV - I don't have a machine.

into home.osdl.org:/home/torvalds/v2.5/linux

Here is a ChangeLog for the patch:

        - The perfmon core will invoke the sampling module handler
          routine once for each overflowed PMD. When multiple PMDs
          overflow at the same time (with the same PMU interrupt),
          then up to 64 distinct calls can happen. A common timestamp
          parameter allows the module to identify this kind of
          entries.

        - Changed the module ovfl_ctrl arguments to simplify the reset
          field. Now it is a simple boolean.

        - Updated perfmon.h to convert the "set" field to ushort from
          uint.  Other structure updates to get better layout.

        - Update perfmon_default_smpl.h to reflect the change in
          overflow processing mentioned above.

        - Cleanup some state checking code to use switch-case instead
          of if-then with macros. Make the code more readable and
          easier to optmize for gcc. Thanks to David for the
          suggestion.

        - Added extra safety checks on pfm_context_load() to verify
          that the task actually exists.

        - The default sampling format module now supports the
          fmt_restart_active callbacks. Patch from David.

into home.osdl.org:/home/torvalds/v2.5/linux

into home.osdl.org:/home/torvalds/v2.5/linux

remove spurious logging of message on "create if file does not exist" case (without O_EXCL) when file exists

When addrconf_ifdown() calls ipv6_mc_destroy_dev(), it has NULL'd
out dev->ip6_ptr, which means all in6_dev_get() calls will fail.
So pass an explicit idev into ipv6_dev_mc_dec() in this case so
that we don't leak the all-nodes multicast address reference to the
idev.

From Dominik Brodowski.

- Can simplify, since the policy is already known, and we only need to kick
  the CPU.

- Make sure we set the right method in the sysdev driver.