135e2/xv6-labs.git - xv6-labs-2024-winter

Age	Commit message (Collapse)	Author	Files	Lines
2019-07-22	fix mapkstack	Frans Kaashoek	1	-1/+1

2019-07-22	Clear U bit for second stack page so that it functions as a guard page	Frans Kaashoek	1	-1/+2

2019-07-19	One way of supporting a guard page below kstack: allocate kstacks in	Frans Kaashoek	1	-0/+2
	procinit() and map them high up (below TRAMPOLNE) with an empty mapping below each stack. Never free a kernel stack. Another way would be to allocate and map them dynamically, but then we need to reload page table when switching processes in scheduler() and/or have a kernel pagetable per proc (if we want k->stack to be the same virtual address in each process). One gotcha: kernel addresses are not equal to physical addresses for stack addresses. A stack address must be translated if we need its physical address (e.g., virtio passes a stack address to the disk).
2019-07-02	try to continue from walk() failing to allocate a page-table page	Robert Morris	1	-2/+2

2019-07-01	have fork() fail, not panic, if not enough phys mem	Robert Morris	1	-1/+1

2019-06-13	virtio disk driver	Robert Morris	1	-0/+5

2019-06-11	separate source into kernel/ user/ mkfs/	Robert Morris	1	-0/+205