Frans Kaashoek
09396a801a
Thanks to Warren Toomey for RDMUL and WRMUL.
2016-08-18 07:42:13 -04:00
Frans Kaashoek
4a3576b810
Small change to support RWMUL and WRMUL. Now xv6 truly works with a block size
...
that is a multiple of the sector size.
2016-08-18 07:39:03 -04:00
Robert Morris
19f65413bd
hold ptable.lock for the entire process creation
...
however, processes still modify their own p->* without locking
2016-08-13 03:44:13 -04:00
Robert Morris
20d05d4411
separate atomic test-and-set from memory barrier.
...
* use xchg only for its atomicness.
* use __sync_synchronize() for both CPU and compiler barrier.
2016-08-12 07:03:35 -04:00
Robert Morris
9c65b32d9e
nothing much
2016-08-11 15:41:53 -04:00
Robert Morris
c779cc2be1
main comments
2016-08-11 13:55:13 -04:00
Robert Morris
241188276c
nits
2016-08-10 12:06:02 -04:00
Robert Morris
3431cd4927
more comments in entryother.S
2016-08-10 11:35:28 -04:00
Robert Morris
0a69dc9b17
even more explicit that entry.S is linked into kernel, unlike bootasm.S.
2016-08-10 11:22:36 -04:00
Robert Morris
858475e4df
tiny clarifications to some gdt code.
2016-08-10 10:51:14 -04:00
Robert Morris
0a4a4230a3
shell nits
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fix Regehr complaint
2016-08-08 13:06:38 -04:00
Frans Kaashoek
50edfe1412
nits
2015-11-15 13:40:42 -05:00
Nathaniel Wesley Filardo
5906118897
Remove console input.lock
...
Use cons.lock for everything. This eliminates the possibility that two CPUS
independently, simultaneously manipulate the CRTC in cgaputc.
2015-11-15 13:28:43 -05:00
Nathaniel Wesley Filardo
02530a4859
Add sanity check panic for CRTC interactions
2015-11-15 13:28:15 -05:00
kaashoek
b019ac4f7d
Merge pull request #3 from beordle/master
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Fix comments
2015-11-15 12:51:54 -05:00
kaashoek
9cbe056cec
Merge pull request #5 from kehao95/master
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Update URL for 2014
2015-11-15 12:45:53 -05:00
kehao95
5371a631d7
Update URL for 2014
2015-11-14 00:14:31 +08:00
Jindong Zhang
abce9b8140
Fix comments
2015-09-18 23:36:45 +08:00
Ayan Shafqat
4f2d38147f
Fixed broken build on Arch Linux
2015-08-12 22:11:39 -04:00
Frans Kaashoek
ecb40fb19d
coding style (per Jeremías Feltan <jeremias.feltan@gmail.com>)
2015-06-30 16:23:56 -04:00
Frans Kaashoek
b67ed0902d
Update memide to reflect recent changes to fs and buf
2015-06-27 13:38:03 -04:00
Frans Kaashoek
8320d61be5
Pick up where i left off in april:
...
- move log into metadata part of disk, so that marking
that the log's blocks are in use falls out for free
- superblock describes the whole disk (sizes and offets)
- sizes and offsets are computed in one place (mkfs) and
the rest of the code refers to the superblock for these values,
instead of recomputing them.
2015-06-27 12:39:13 -04:00
Frans Kaashoek
de4af193c8
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.
2015-04-10 20:39:40 -04:00
Frans Kaashoek
895af77fe6
check blockno passed to idestart
2015-04-10 07:15:06 -04:00
Frans Kaashoek
c24ac5d763
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.
2015-04-03 08:22:02 -04:00
Austin Clements
7443b9649a
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.
2015-03-24 20:54:39 -04:00
Cody Cutler
3d2dedd427
fix buf where concurrent fs syscalls race on log entries
2015-02-19 11:51:47 -05:00
Austin Clements
41f16c2183
Increase VM memory when running qemu-memfs
...
Presumably because of the pre-loaded file system, the default RAM is
insufficient when running kernelmemfs
2014-10-03 09:44:26 -04:00
Austin Clements
8e54196355
Make kernelmemfs depend on kernel.ld
2014-10-03 09:43:44 -04:00
Austin Clements
0dd991dd20
Fix kernelmemfs linking
...
Commit 9aa0337d
2014-10-03 09:39:09 -04:00
Frans Kaashoek
053082fbed
ggdb -> gdwarf-2 for gcc4.8
2014-09-23 07:39:32 -04:00
Cody Cutler
e7d77aad2b
whoops. forgot date.h
2014-09-12 18:41:38 -04:00
Cody Cutler
aae4e7490f
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.
2014-09-12 18:09:51 -04:00
Frans Kaashoek
75dee1219f
Oops (thanks David Lawrence)
2014-09-08 18:00:53 -04:00
Frans Kaashoek
9ba21267e7
no need to generate postscript version
2014-08-29 17:10:32 -04:00
Frans Kaashoek
74c77da6f8
Nice layout for a printout of the code
2014-08-29 17:06:49 -04:00
Frans Kaashoek
ac83a21a5b
Ack all bug reports and patches. Is this all of them?
2014-08-29 09:03:29 -04:00
Frans Kaashoek
698b8fb598
update for 2014
2014-08-28 17:28:40 -04:00
Robert Morris
e2b4583d05
xx
2014-08-28 17:04:47 -04:00
Robert Morris
8d618cab78
Merge branch 'master' of git+ssh://amsterdam.csail.mit.edu/home/am0/6.828/xv6
2014-08-28 16:13:58 -04:00
Robert Morris
2b2c1971fc
write log blocks from cache only at end of transaction
2014-08-28 16:06:12 -04:00
Robert Morris
11183588dc
nits
2014-08-28 06:27:01 -04:00
Robert Morris
48aa917403
i think this is a working concurrent logging scheme
2014-08-28 05:57:47 -04:00
Robert Morris
71453f72f2
a start at concurrent FS system calls
2014-08-27 17:15:30 -04:00
Robert Morris
12eeefc72d
comments
2014-08-27 14:14:52 -04:00
Robert Morris
2c56547272
every iput() and namei() must be inside a transaction
2014-08-04 13:06:48 -04:00
Robert Morris
020c8e2384
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
2014-08-04 06:13:49 -04:00
Frans Kaashoek
86188d9d49
newer versions of qemu have different binary names (per Joel Nider <joel@nider.org>)
2014-07-31 11:15:15 -04:00
Stephen Tu
ff2783442e
Correct a security bug in copyuvm()
...
copyuvm() should not allow new copied pages to inherit more
permissions than the original pages.
2013-03-04 16:16:54 -05:00
Cam Tenny
241c068066
Prevent extra rebuild of fs.img by keeping intermediate object files.
2012-10-24 18:52:40 -04:00
