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2017-08-29fix runoff complaints about pagination and long linesRobert Morris1-2/+2
2017-02-01A tiny bit of clean up (e.g., move code searching cpu array from lapic.c intoFrans Kaashoek1-2/+13
mycpu() in proc.c.
2017-02-01use panicFrans Kaashoek1-6/+2
2017-02-01shorten commentFrans Kaashoek1-6/+2
2017-02-01Eliminate code for gs trick to track per-cpu state. We rely on lapiccpunum()Frans Kaashoek1-11/+23
to find a per-cpu id with which we locate a cpu's cpu struct.
2017-01-31Read curproc from cpu structure, but be careful because after a schedule eventFrans Kaashoek1-38/+63
myproc() points to a different thread. myproc(); sched(); myproc(); // this proc maybe different than the one before sched Thus, in a function that operates on one thread better to retrieve the current process once at the start of the function.
2017-01-31Start of an experiment to remove the use of gs for cpu local variables.Frans Kaashoek1-40/+49
2016-09-15change allocproc() back to acquiring the ptable.lock.Robert Morris1-14/+6
fix bugs where caller incorrectly released lock on error return path.
2016-09-08this might fix the reported deadlock, though I can't reproduce it.Robert Morris1-1/+17
2016-09-02comment about sched() saving/restoring cpu->intenaRobert Morris1-1/+6
2016-08-25Remove trailing white space with:Frans Kaashoek1-9/+9
for f in *.{h,c}; do sed -i .sed 's/[[:blank:]]*$//' $f; done (Thanks to Nicolás Wolovick)
2016-08-13hold ptable.lock for the entire process creationRobert Morris1-7/+13
however, processes still modify their own p->* without locking
2016-08-11nothing muchRobert Morris1-1/+1
2015-06-27Pick up where i left off in april:Frans Kaashoek1-1/+2
- 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.
2014-08-27a start at concurrent FS system callsRobert Morris1-2/+2
2014-08-04every iput() and namei() must be inside a transactionRobert Morris1-0/+2
2014-08-04use acquire/release to force order for pid=np->pid;np->state=RUNNINGRobert Morris1-3/+7
for bug reported by symingz@gmail.com and cs1100254@cse.iitd.ernet.in
2012-08-22Remove unused argument to setupkvm (thanks to Peter Froehlich)Frans Kaashoek1-1/+1
2011-09-01fix usertests to correctly test what happens when you callRobert Morris1-1/+1
exec() with arguments that don't fit on a single page.
2011-08-22A commentFrans Kaashoek1-0/+3
2011-08-22Remove sys_init syscallFrans Kaashoek1-0/+6
Invoke initlog from forkret on first user process
2011-08-09Use static page table for boot, mapping first 4Mbyte; no more segment trickFrans Kaashoek1-1/+1
Allocate proper kernel page table immediately in main using boot allocator Remove pginit Simplify address space layout a tiny bit More to come (e.g., superpages to simplify static table)
2011-07-29Map kernel highFrans Kaashoek1-0/+1
Very important to give qemu memory through PHYSTOP :(
2011-02-19xv6: formatting, cleanup, rev5 (take 2)Russ Cox1-38/+38
2011-01-11make new code like old codeRuss Cox1-5/+7
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.
2010-09-13change some comments, maybe more informativeRobert Morris1-2/+4
delete most comments from bootother.S (since copy of bootasm.S) ksegment() -> seginit() move more stuff from main() to mainc()
2010-09-02Simplify allocuvm/deallocuvm to operate in a contiguous memory model. This ↵Austin Clements1-3/+4
makes their interface match up better with proc->sz and also simplifies the callers (it even gets the main body of exec on one page).
2010-09-02Simplify inituvm and userinit by assuming initcode fits on a pageAustin Clements1-5/+2
2010-09-02Oops. Broke the build when I rearranged proc.cAustin Clements1-0/+2
2010-09-02Rearrange proc.h and proc.c to get our action-packed spreads back (mostly). ↵Austin Clements1-86/+86
They also make sense in this order, so it's not just for page layout.
2010-09-01Space policeAustin Clements1-5/+5
2010-08-31Fix too-long linesAustin Clements1-1/+2
2010-08-31kalloc/kfree now only a page at a timeRobert Morris1-3/+3
do not keep sorted contiguous free list
2010-08-10allow sbrk(-x) to de-allocate user memoryRobert Morris1-2/+7
2010-08-06fix corner cases in exec of ELFRobert Morris1-5/+5
put an invalid page below the stack have fork() handle invalid pages
2010-08-05remove some unused vm #definesRobert Morris1-1/+1
fix corner cases with alignment when mapping kernel ELF file
2010-07-25some cleanupFrans Kaashoek1-1/+1
2010-07-23Checkpoint page-table version for SMPFrans Kaashoek1-0/+1
Includes code for TLB shootdown (which actually seems unnecessary for xv6)
2010-07-02Initial version of single-cpu xv6 with page tablesFrans Kaashoek1-57/+15
2009-09-20nit in commentFrans Kaashoek1-1/+1
2009-09-03formatting tweaksRuss Cox1-1/+2
2009-09-02can set just %gs now.Russ Cox1-2/+1
2009-09-02another attempt at cpu-local variables.Russ Cox1-2/+1
this time do it ourselves instead of piggybacking on TLS. add -fno-pic to Makefile; pic code breaks our fake TLS.
2009-09-02fix TLS again;Russ Cox1-2/+3
still not quite but a lot better.
2009-09-02Fix TLS for PIC systemsRuss Cox1-0/+1
2009-08-30assorted fixes:Russ Cox1-58/+57
* rename c/cp to cpu/proc * rename cpu.context to cpu.scheduler * fix some comments * formatting for printout
2009-08-08shuffle and tweak for formatting.Russ Cox1-102/+104
pdf has very good page breaks now. would be a good copy for fall 2009.
2009-07-12more doc tweaksRuss Cox1-20/+18
2009-07-11initproc, usegment, swtch tweaksRuss Cox1-46/+39
2009-05-31compile fixesrsc1-7/+5