check blockno passed to idestart

Disentangle block size from the disk's sector size. Set block size to 1024 to show
that they can be different. Clean up mkfs, simplifying specifying fs parameters,
remove some redundancy between fs

Disentangle block size from the disk's sector size. Set block size to 1024 to show
that they can be different. Clean up mkfs, simplifying specifying fs parameters,
remove some redundancy between fs and mkfs, and fix disk layout bugs. Call blocks
in the file system blocks instead of sectors. Passes usertests for different
block sizes.

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xx

i think this is a working concurrent logging scheme

log write() data
usertest for big write()s
push begin_trans/commit_trans down into syscalls

Map kernel high
Very important to give qemu memory through PHYSTOP :(

Dirt simple logging
Passes usertests and stressfs
Seems to recover correctly in a number of simple cases

copyout() copies data to a va in a pagetable, for exec() &c
usertest that passes too many arguments, break exec

kalloc/kfree now only a page at a time
do not keep sorted contiguous free list

Initial version of single-cpu xv6 with page tables

simplify ide queuing
nits in comments

add missing iput() at end of _namei()

NREQUEST = NBUF

PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf

Various changes made while offline.

+ bwrite sector argument is redundant; use b->sector.
+ reformatting of files for nicer PDF page breaks
+ distinguis

PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf

Various changes made while offline.

+ bwrite sector argument is redundant; use b->sector.
+ reformatting of files for nicer PDF page breaks
+ distinguish between locked, unlocked inodes in type signatures
+ change FD_FILE to FD_INODE
+ move userinit (nee proc0init) to proc.c
+ move ROOTDEV to param.h
+ always parenthesize sizeof argument

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struct fd -> struct file

spacing

clean up stale error checks and panics
delete unused functions
a few comments

devsw
checkpoint: write(fd,"hello\n",6) where fd is a console dev almost works

bread
iget
mkfs makes a file system image
put this in your .bochsrc:
ata0-slave: type=disk, mode=flat, path="fs.img", cylinders=1024, heads=1, spt=1

queue with disk requests

file descriptors
pipes

checkpoint. booting second processor. stack is messed up, but thanks to cliff
and plan 9 code, at least boots and gets into C code.

import