xv6-cs450/BUGS

proc.c:
	as a consequence of the implementation of proc_kill,
	any loop calling sleep should check for p->killed
	and be able to break out with an error return.
	it is better if you check *before* sleep.

syscall.c:
	cannot convince runoff1 to split the extern lists 
	  to fill previous page completely.

formatting:
	file.c filewrite leaks onto next page
	need to fix PAGEBREAK mechanism
accumulate bugs 2006-09-17 21:19:01 +02:00			`proc.c:`
			`as a consequence of the implementation of proc_kill,`
			`any loop calling sleep should check for p->killed`
			`and be able to break out with an error return.`
notes 2007-08-08 12:32:32 +02:00			`it is better if you check before sleep.`
accumulate bugs 2006-09-17 21:19:01 +02:00
Various cleanup: - Got rid of dummy proc[0]. Now proc[0] is init. - Added initcode.S to exec /init, so that /init is just a regular binary. - Moved exec out of sysfile to exec.c - Moved code dealing with fs guts (like struct inode) from sysfile.c to fs.c. Code dealing with system call arguments stays in sysfile.c - Refactored directory routines in fs.c; should be simpler. - Changed iget to return unlocked inode structure. This solves the lookup-then-use race in namei without introducing deadlocks. It also enabled getting rid of the dummy proc[0]. 2007-08-21 21:22:08 +02:00			`syscall.c:`
PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf Various changes made while offline. + bwrite sector argument is redundant; use b->sector. + reformatting of files for nicer PDF page breaks + distinguish between locked, unlocked inodes in type signatures + change FD_FILE to FD_INODE + move userinit (nee proc0init) to proc.c + move ROOTDEV to param.h + always parenthesize sizeof argument 2007-08-22 08:01:32 +02:00			`cannot convince runoff1 to split the extern lists`
			`to fill previous page completely.`
Various cleanup: - Got rid of dummy proc[0]. Now proc[0] is init. - Added initcode.S to exec /init, so that /init is just a regular binary. - Moved exec out of sysfile to exec.c - Moved code dealing with fs guts (like struct inode) from sysfile.c to fs.c. Code dealing with system call arguments stays in sysfile.c - Refactored directory routines in fs.c; should be simpler. - Changed iget to return unlocked inode structure. This solves the lookup-then-use race in namei without introducing deadlocks. It also enabled getting rid of the dummy proc[0]. 2007-08-21 21:22:08 +02:00
PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf Various changes made while offline. + bwrite sector argument is redundant; use b->sector. + reformatting of files for nicer PDF page breaks + distinguish between locked, unlocked inodes in type signatures + change FD_FILE to FD_INODE + move userinit (nee proc0init) to proc.c + move ROOTDEV to param.h + always parenthesize sizeof argument 2007-08-22 08:01:32 +02:00			`formatting:`
			`file.c filewrite leaks onto next page`
			`need to fix PAGEBREAK mechanism`
Various cleanup: - Got rid of dummy proc[0]. Now proc[0] is init. - Added initcode.S to exec /init, so that /init is just a regular binary. - Moved exec out of sysfile to exec.c - Moved code dealing with fs guts (like struct inode) from sysfile.c to fs.c. Code dealing with system call arguments stays in sysfile.c - Refactored directory routines in fs.c; should be simpler. - Changed iget to return unlocked inode structure. This solves the lookup-then-use race in namei without introducing deadlocks. It also enabled getting rid of the dummy proc[0]. 2007-08-21 21:22:08 +02:00