Commit to running on an SMP (perhaps with only 1 core). Remove most code
from picirq.c and remove timer.c completely. Update runoff.list.

Start of an experiment to remove the use of gs for cpu local variables.

Straight replacement of B_BUSY with a sleeping lock.

Remove trailing white space with:
for f in *.{h,c}; do sed -i .sed 's/[[:blank:]]*$//' $f; done
(Thanks to Nicolás Wolovick)

Small change to support RWMUL and WRMUL. Now xv6 truly works with a block size
that is a multiple of the sector size.

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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make the book happy

clarify some FS comments

Revert "Introduce and use sleeplocks instead of BUSY flags"
My changes have a race with re-used bufs and the code doesn't seem to get shorter
Keep the changes that fixed ip->off race

This reverts co

Revert "Introduce and use sleeplocks instead of BUSY flags"
My changes have a race with re-used bufs and the code doesn't seem to get shorter
Keep the changes that fixed ip->off race

This reverts commit 3a5fa7ed9020eaf8ab843a16d26db7393b2ec072.

Conflicts:

defs.h
file.c
file.h

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Introduce and use sleeplocks instead of BUSY flags
Remove I_BUSY, B_BUSY, and intrans defs and usages
One spinlock per buf to avoid ugly loop in bget
fix race in filewrite (don't update f->off after

Introduce and use sleeplocks instead of BUSY flags
Remove I_BUSY, B_BUSY, and intrans defs and usages
One spinlock per buf to avoid ugly loop in bget
fix race in filewrite (don't update f->off after releasing lock)

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Make cross reference with text work

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

xv6: formatting, cleanup, rev5 (take 2)

make new code like old code

Variable declarations at top of function,
separate from initialization.

Use == 0 instead of ! for checking pointers.

Consistent spacing around {, *, casts.

Declare 0-p

make new code like old code

Variable declarations at top of function,
separate from initialization.

Use == 0 instead of ! for checking pointers.

Consistent spacing around {, *, casts.

Declare 0-parameter functions as (void) not ().

Integer valued functions return -1 on failure, 0 on success.

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Initial version of single-cpu xv6 with page tables

assorted fixes:
* rename c/cp to cpu/proc
* rename cpu.context to cpu.scheduler
* fix some comments
* formatting for printout

group locks into structs they protect.
few naming nits.

ide.c: make names more regular

be consistent: no underscores in function names

make new Homework 8 work

comments; rename irq_ to pic_

spaces around else for rtm

nits

comment non-check of cp->killed