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Author SHA1 Message Date
Frans Kaashoek
a3f6d9fd1e cow moved to xv6-riscv-fall19 2019-08-26 21:16:33 -04:00
Frans Kaashoek
92c3c02098 RISC-V port doesn't borrow this code 2019-08-26 08:49:50 -04:00
Frans Kaashoek
510bcde894 Add major/minor/mkdev 
Maybe apply this change to master
 2019-08-23 19:41:53 -04:00
Frans Kaashoek
7241838b4c Move labs into 6.828 repo. The lab text isn't dependent on specific 
xv6 code. Lab submission instructions etc. are likely going to be more
MIT 6.828 specific.
 2019-08-20 20:23:18 -04:00
Frans Kaashoek
c612d452fd validateint doesn't test something interesting on RISC-V; delete it. 2019-08-20 13:04:12 -04:00
Frans Kaashoek
b564fca246 Rationalize some constants in usertests 2019-08-20 12:58:00 -04:00
Frans Kaashoek
d98ddadd79 Also release buffer on failed copyout 2019-08-20 12:46:56 -04:00
Frans Kaashoek
6005ef5a1c Release buffer also when copyin fails 2019-08-20 11:57:24 -04:00
Frans Kaashoek
d9818b89e1 512 -> BSIZE 2019-08-20 11:56:56 -04:00
Frans Kaashoek
a825f22cf8 Merge remote-tracking branch 'origin/master' into riscv 2019-08-19 19:27:29 -04:00
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
when this general area was last touched.  Remove it now to avoid
potential confusion.

Signed-off-by: Dan Cross <cross@gajendra.net>
 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