xv6-riscv - MIT xv6-RISCV kernel modified to RV64I base integer extension

Age	Commit message (Collapse)	Author
2019-06-11	separate source into kernel/ user/ mkfs/	Robert Morris

2019-06-04	support read() and write() bigger than one page	Robert Morris

2019-05-31	-initrd fs.img, ramdisk.c, file system	Robert Morris

2017-01-31	Start of an experiment to remove the use of gs for cpu local variables.	Frans Kaashoek

2016-09-11	Replace I_BUSY with sleep locks	Frans Kaashoek

2011-08-29	Revert "Introduce and use sleeplocks instead of BUSY flags"	Frans Kaashoek
	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
2011-08-26	Introduce and use sleeplocks instead of BUSY flags	Frans Kaashoek
	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)
2011-01-11	make new code like old code	Russ Cox
	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.
2010-08-31	kalloc/kfree now only a page at a time	Robert Morris
	do not keep sorted contiguous free list
2009-08-30	assorted fixes:	Russ Cox
	* rename c/cp to cpu/proc * rename cpu.context to cpu.scheduler * fix some comments * formatting for printout
2009-08-08	shuffle and tweak for formatting.	Russ Cox
	pdf has very good page breaks now. would be a good copy for fall 2009.
2009-07-12	more doc tweaks	Russ Cox

2009-05-31	simplify	rsc

2008-10-15	as rtm noticed, avoid doubly-freeing pipe page	kolya

2008-08-22	clean up circular buffers, so pipe can queue 512 bytes rather than 511	kolya

2007-08-28	spaces around else for rtm	rsc

2007-08-28	more consistent spacing	rsc

2007-08-28	formatting	rsc

2007-08-28	remove _ from pipe; be like file	rsc

2007-08-27	delete unnecessary #include lines	rsc

2007-08-27	nits	rsc

2007-08-14	i cannot prove that release before wakeup is wrong, but i cannot convince ↵	rsc
	myself it is right either
2007-08-14	formatting	rsc

2007-08-10	Make cp a magic symbol.	rsc

2007-08-10	move variable declaration up	rsc

2007-08-09	spacing	rsc

2007-08-08	check p->killed for long-lived sleeps	rsc

2006-09-08	stop using fd to name files	rsc

2006-09-06	fd_* => file_*	rsc

2006-09-06	fd.* -> file.*	rsc

2006-09-06	struct fd -> struct file	rsc

2006-09-06	writeable => writable	rsc

2006-09-06	standardize various * conventions	rsc

2006-08-10	interrupts could be recursive since lapic_eoi() called before rti	rtm
	so fast interrupts overflow the kernel stack fix: cli() before lapic_eoi()
2006-07-18	prevent longjmp / forkret from writing over tf->edi	rtm

2006-07-15	no more recursive locks	rtm
	wakeup1() assumes you hold proc_table_lock sleep(chan, lock) provides atomic sleep-and-release to wait for condition ugly code in swtch/scheduler to implement new sleep fix lots of bugs in pipes, wait, and exit fix bugs if timer interrupt goes off in schedule() console locks per line, not per byte
2006-07-12	no more big kernel lock	rtm
	succeeds at usertests.c pipe test
2006-07-01	swtch saves callee-saved registers	rtm
	swtch idles on per-CPU stack, not on calling process's stack fix pipe bugs usertest.c tests pipes, fork, exit, close
2006-06-27	file descriptors	rtm
	pipes