4.10 Approaching

Feng, Kate feng at bnl.gov
Fri Oct 2 02:23:51 UTC 2009

Yes, I read the code this morning, and it looks like the 
patch for HAVE_BLKSIZE   is in.  However, the patch
for setjmp() and longjmp() were not considered.  I am
not too sure why Ralf sees it controversial.  Please


From: rtems-users-bounces at rtems.org on behalf of Joel Sherrill
Sent: Thu 10/1/2009 9:58 PM
To: Chris Johns
Cc: RTEMS Users; Ralf Corsepius
Subject: Re: 4.10 Approaching

Chris Johns wrote:
> Till Straumann wrote:
>> I actually would really recommend the HAVE_BLKSIZE patch - which
>> BTW has been recommended for a looong time; see e.g.,
>> libfs/src/nfsclient/README. It greatly improves stdio on any blocked
>> filsystem.
>> msdosfs and NFS already do provide the necessary blocksize information.
>> IMFS currently sets the blocksize to 0 for directories. zero is also
>> the default if a filesystem does not set/provide a blocksize.
>> newlib stdio correctly handles the case of a zero blocksize but
>> some 'fseek()' performance gain could be achieved by using
>> BUFSIZ/1024 in these cases.
>> I can't really see *anything* controversial in this case.
> I have just looked in my local copy of newlib-1.17.0 and ChangeLog.rtems
> has:
> 2009-02-24      Ralf Corsépius <ralf.corsepius at rtems.org>
>          * libc/unix/ttyname.c: Sync with newlib-cvs.
>          * configure.host: Add -DHAVE_BLKSIZE to newlib_cflags.
> Is this change already in newlib ? I cannot remember if I applied any of
> Ralf's patches to this or if they are clean. I seem to remember them
> being clean.
Looks like it.  My newlib cvs has this:

2009-09-22  Ralf Corsépius <ralf.corsepius at rtems.org>

        * configure.host (*-rtems*): Remove -DMISSING_SYSCALL_NAMES.

> FYI I have code I am working on that allows the block size to change at
> the bdbuf layer and below. Currently the coming RFS file system has
> support for changing the block size. The MSDOS file system could be
> changed to do this and so removed the way it handles the buffers. Along
> with this change I have a statvfs call to add to libcsupport. The call
> returns the file system block and the media block sizes.
> Regards
> Chris
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