Changes from 1.1.36 to 1.1.37

These changes are archived on ftp.crynwr.com:pub/kchanges and http://www.crynwr.com/kchanges. I cannot answer questions about Linux -- I merely summarize the kernel patches after reading them. I try to make them useful to everyone, but kernel hackers should take them with a grain of salt and read the patches themselves. The patch file is patch37.gz

• IDE Performance Enhancements Version 2.1 -- Support added for E-IDE BIOSs, for systems with IDE drives that "have more than 16 logical heads" (according the BIOS). -- the HDIO_SETUNMASKINTR and HDIO_SETMULTCOUNT now permit only the superuser to change settings, and no longer permit minor device numbers to be used.
• More changes to memory management. Removed some overly enthusiastic merges of vm areas.
• Changed the AHA1542 driver to delay a little bit before sending commands.
• Changed the SCSI driver so that it keeps a linked list of SCSI devices, in preparation for hot swapping.
• Added a two-level directory cache. The idea is that new additions (from readdir(), for example) will not flush the cache of entries that have really been used.
• ext2 directory caching is gone.
• If the rock ridge driver can't read a continuation record, it detects that now.
• SysV filesystem driver is now version beta 2, and includes memory mapping.
• A few new fields initialized in the elf binary format handler.
• New swapping is now standard.
• Scheduler is a little less enthusiastic about switching to new tasks.
• Optimize the uid testing in doing system calls.
• Missed a test for allowing suid execution to make a syscall.

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