One ide command for nsector_per_block generates nsector_per_block interrupts,
instead of 1. ideintr() should wait for nsector_per_block interrupts before
waking up the reader; now it wakes up the r

One ide command for nsector_per_block generates nsector_per_block interrupts,
instead of 1. ideintr() should wait for nsector_per_block interrupts before
waking up the reader; now it wakes up the reader after 1 interrupt, which
apparently means that the first sector is available of the command instead of all.
For now keep BSIZE to 512.

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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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Fix missing NUL-terminator in grep

Currently, grep read()s into a buffer and then uses the buffer as a
string. Since there's no NUL-terminator, this can cause it to falsely
identify line breaks and

Fix missing NUL-terminator in grep

Currently, grep read()s into a buffer and then uses the buffer as a
string. Since there's no NUL-terminator, this can cause it to falsely
identify line breaks and matches from leftover data on earlier lines
and, if a line fills up the entire buffer, to read past the end of the
buffer.

Fix this by NUL-terminating any data returned by read().

Thanks to Keiichi Watanabe for the report.

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fix buf where concurrent fs syscalls race on log entries

Increase VM memory when running qemu-memfs

Presumably because of the pre-loaded file system, the default RAM is
insufficient when running kernelmemfs

Make kernelmemfs depend on kernel.ld

Fix kernelmemfs linking

Commit 9aa0337d introduced a linker script for linking the kernel image,
but only changed the kernel target to use it. kernelmemfs was still
using the old linker command lin

Fix kernelmemfs linking

Commit 9aa0337d introduced a linker script for linking the kernel image,
but only changed the kernel target to use it. kernelmemfs was still
using the old linker command line arguments, which weren't sufficient.

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ggdb -> gdwarf-2 for gcc4.8

whoops. forgot date.h

cmosgetdate() for system-call homework

the day of reckoning has come for the debug port "Shutdown" hack.

instead of mucking with ACPI or using a new hack, the student will now write
sys_date() usin

cmosgetdate() for system-call homework

the day of reckoning has come for the debug port "Shutdown" hack.

instead of mucking with ACPI or using a new hack, the student will now write
sys_date() using the cmosgetdate() helper.

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Oops (thanks David Lawrence)

no need to generate postscript version

Nice layout for a printout of the code

Ack all bug reports and patches. Is this all of them?

update for 2014

xx

write log blocks from cache only at end of transaction

nits

i think this is a working concurrent logging scheme

a start at concurrent FS system calls

comments

every iput() and namei() must be inside a transaction

use acquire/release to force order for pid=np->pid;np->state=RUNNING
for bug reported by symingz@gmail.com and cs1100254@cse.iitd.ernet.in

newer versions of qemu have different binary names (per Joel Nider <joel@nider.org>)