Dan Cross
82638c019c
Avoid rereading the superblock in bfree
...
The superblock is read when the first process returns to
userspace (via the call to `iinit` from the first invocation of
`forkret`, when `first` is still set to 1) and cached in a
global; it is treated as immutable from that point on. There is
no reason to re-read it in bfree.
Removing this call seems to have simply been missed in 8320d61b
2019-08-19 19:25:43 -04:00
Frans Kaashoek
21ad8c76bc
A few now unused DOC
2019-08-19 18:12:19 -04:00
Frans Kaashoek
ce565ae04a
dan cross
2019-08-19 14:46:33 -04:00
Frans Kaashoek
e10f797762
Merge remote-tracking branch 'origin/master' into riscv
2019-08-19 13:35:47 -04:00
Dan Cross
0581c37baf
Removed unused dirlookup argument in create
...
The `off` argument to `dirlookup` is optional. It
was not being used in the `dirlookup` call in `create`,
so pass NULL instead and delete the unused local.
Signed-off-by: Dan Cross <cross@gajendra.net>
2019-08-19 13:22:35 -04:00
Frans Kaashoek
2501560cd6
Cosmetic cleanup: fsinit reads sb and calls loginit. initialize icache
...
in main.c and don't make it disk specific; the icache is shared. This
doesn't matter since we have only one disk, but conceptually cleaner
and maybe helpful to students for mount lab.
2019-08-18 14:35:11 -04:00
Frans Kaashoek
a9953236cc
x
2019-08-17 12:52:25 -04:00
Frans Kaashoek
e61377bf8a
Update write up to reflect new test cases.
2019-08-17 12:33:32 -04:00
Frans Kaashoek
5498ee2e92
Draft mount/umount lab as an alternative lab for fs.html
...
fs.html should perhaps be split in small homeworks as in previous
years in preparation for lectures and/or as demos during lecture.
2019-08-12 10:25:55 -04:00
Frans Kaashoek
e398a9815c
Wrap state of disk driver in a struct so that it is easier to support
...
several disks (e.g., in a mount lab).
2019-08-12 07:20:32 -04:00
Robert Morris
d96a8c5661
add alarmtest.c to the repository
...
they don't have to modify alarmtest.c, so we can use the
original version to test, to make it harder to cheat.
2019-08-05 02:04:44 -04:00
Robert Morris
deec67f05d
alarm stuff
2019-08-03 07:12:00 -04:00
Frans Kaashoek
fdea265489
two notes
2019-08-02 16:42:55 -04:00
Frans Kaashoek
564d10bb22
Add simple crash recovery assignment to fs lab
2019-08-02 16:29:25 -04:00
Robert Morris
c5163e4a42
nits
2019-08-02 16:22:56 -04:00
Robert Morris
3bee885ed7
some XXX questions
2019-08-02 14:51:04 -04:00
Robert Morris
e788af9b81
oops, back to alarm()
2019-08-02 13:25:57 -04:00
Robert Morris
0b5c01d429
Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscv
2019-08-02 13:18:37 -04:00
Robert Morris
9110f40b7d
sigalarm
2019-08-02 13:18:26 -04:00
Frans Kaashoek
7510ac70e5
Combine the linux mmap hw with memory-mapped files in xv6 into a separate lab
2019-08-02 13:07:21 -04:00
Robert Morris
0c10cbe829
syscall lab nits
2019-08-02 11:55:26 -04:00
Frans Kaashoek
0c3125b9eb
Add uthread
2019-08-02 08:52:36 -04:00
Frans Kaashoek
b02ef59e14
x
2019-08-01 16:52:38 -04:00
Frans Kaashoek
62ece4b09e
Merge branch 'riscv-bcache' into riscv
2019-08-01 15:46:50 -04:00
Robert Morris
fb8a0099d4
fences for starting
2019-08-01 14:59:20 -04:00
Frans Kaashoek
77da01abb1
First draft of text for mmap assignment.
2019-08-01 07:56:39 -04:00
Robert Morris
d600026c3f
cut ramdisk
2019-07-30 16:06:00 -04:00
Frans Kaashoek
b70cd9ebd7
Import big file assignment.
2019-07-30 14:33:09 -04:00
Frans Kaashoek
9c4f62e8e3
x
2019-07-30 13:07:17 -04:00
Frans Kaashoek
848d1906e8
Track in buf if disk "owns" buffer
2019-07-30 12:53:19 -04:00
Frans Kaashoek
87183da13d
An easier version of bcache assignment
2019-07-30 10:01:22 -04:00
Frans Kaashoek
f37a3e3964
Make pin/unpin explicit
2019-07-30 08:54:43 -04:00
Frans Kaashoek
f1bb53c690
The driver should free descriptors, not interrupt handler. This
...
avoids handler freeing descriptors before driver sees that the request
has completed.
2019-07-30 08:13:03 -04:00
Frans Kaashoek
5304310452
Remove B_DIRTY
...
Use refcnt to pin blocks into the cache
Replace flags/B_VALID with a boolean field valid
Use info[id].status to signal completion of disk interrupt
Pass a read/write flag to virtio_disk_rw
2019-07-29 17:33:16 -04:00
Frans Kaashoek
34980381bd
checkpoint
2019-07-29 15:49:47 -04:00
Frans Kaashoek
005773c0c3
Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscv
2019-07-29 11:44:55 -04:00
Robert Morris
47b9cfee49
separate out timer init code for clarity
2019-07-28 13:16:49 -04:00
Robert Morris
1ec50c5848
xxx
2019-07-28 07:43:22 -04:00
Frans Kaashoek
33494edad5
Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscv
2019-07-28 07:43:09 -04:00
Robert Morris
2d89a101c4
Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscv
2019-07-28 07:10:23 -04:00
Robert Morris
6507da772d
argptr no longer needed, since copyin checks
2019-07-28 06:29:37 -04:00
Frans Kaashoek
fe14bd1113
a thought
2019-07-27 21:02:37 -04:00
Frans Kaashoek
bdcd23ea49
a bit more
2019-07-27 20:18:40 -04:00
Frans Kaashoek
d82f43e0c7
Checkpoint start of locking lab
2019-07-27 16:00:12 -04:00
Robert Morris
629faafa36
cleaner UART register interface
2019-07-27 06:44:24 -04:00
Robert Morris
a33f60fea3
console/uart tweaks
2019-07-27 05:47:19 -04:00
Robert Morris
cf48b24c03
beautify console.c
2019-07-27 04:15:06 -04:00
Robert Morris
281d450a08
split printf into a separate file, to make console.c more like a driver
2019-07-27 03:49:03 -04:00
Frans Kaashoek
734faa27ac
Pass over lab text
2019-07-26 21:03:59 -04:00
Robert Morris
cc1a303d09
fetchint isn't used any more
2019-07-26 12:34:06 -04:00
