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David van Moolenbroek f202792edf VM: fix for handling one-shot page memory 
The original one-shot page patch (git-e321f65) did not account for the
possibility of pagefaults happening while copying memory in the
kernel.  This allowed a simple cp(1) from vbfs to hang the system,
since VM was repeatedly requesting the same page from the file system.

With this fix, VM no longer tries to fetch the same memory-mapped page
from VFS more than once per memory handling request from the kernel.
In addition to fixing the original issue, this change should make
handling memory somewhat more robust and ever-so-slightly faster.

Test74 has been extended with a simple test for this case.

Change-Id: I6e565f3750141e51b52ec98c938f8e1aa40070d0
2015-02-10 13:47:27 +00:00
..
blocktest minix/ changes for arm llvm build 2014-12-03 23:40:56 +01:00
ddekit merge libminlib with libc 2014-08-28 18:49:19 +02:00
ds merge libminlib with libc 2014-08-28 18:49:19 +02:00
fbdtest Move all services to /service 2014-07-31 16:00:31 +02:00
ipc New sources layout 2014-07-31 16:00:30 +02:00
kernel merge libminlib with libc 2014-08-28 18:49:19 +02:00
safecopy merge libminlib with libc 2014-08-28 18:49:19 +02:00
check-install /usr/tests/minix-posix/check-install 2014-08-13 16:42:57 +02:00
common.c New sources layout 2014-07-31 16:00:30 +02:00
common.h New sources layout 2014-07-31 16:00:30 +02:00
magic.h New sources layout 2014-07-31 16:00:30 +02:00
Makefile Restart policies: Add testing and ProcFS DB 2014-12-10 23:11:25 +01:00
Makefile.inc New sources layout 2014-07-31 16:00:30 +02:00
mod.c New sources layout 2014-07-31 16:00:30 +02:00
run Restart policies: Add testing and ProcFS DB 2014-12-10 23:11:25 +01:00
t10a.c New sources layout 2014-07-31 16:00:30 +02:00
t11a.c New sources layout 2014-07-31 16:00:30 +02:00
t11b.c New sources layout 2014-07-31 16:00:30 +02:00
t40a.c New sources layout 2014-07-31 16:00:30 +02:00
t40b.c New sources layout 2014-07-31 16:00:30 +02:00
t40c.c New sources layout 2014-07-31 16:00:30 +02:00
t40d.c New sources layout 2014-07-31 16:00:30 +02:00
t40e.c New sources layout 2014-07-31 16:00:30 +02:00
t40f.c New sources layout 2014-07-31 16:00:30 +02:00
t40g.c New sources layout 2014-07-31 16:00:30 +02:00
t60a.c New sources layout 2014-07-31 16:00:30 +02:00
t60b.c New sources layout 2014-07-31 16:00:30 +02:00
t67a.c New sources layout 2014-07-31 16:00:30 +02:00
t67b.c New sources layout 2014-07-31 16:00:30 +02:00
t68a.c New sources layout 2014-07-31 16:00:30 +02:00
t68b.c New sources layout 2014-07-31 16:00:30 +02:00
test1.c New sources layout 2014-07-31 16:00:30 +02:00
test2.c New sources layout 2014-07-31 16:00:30 +02:00
test3.c New sources layout 2014-07-31 16:00:30 +02:00
test4.c New sources layout 2014-07-31 16:00:30 +02:00
test5.c New sources layout 2014-07-31 16:00:30 +02:00
test6.c New sources layout 2014-07-31 16:00:30 +02:00
test7.c New sources layout 2014-07-31 16:00:30 +02:00
test8.c New sources layout 2014-07-31 16:00:30 +02:00
test9.c New sources layout 2014-07-31 16:00:30 +02:00
test10.c New sources layout 2014-07-31 16:00:30 +02:00
test11.c New sources layout 2014-07-31 16:00:30 +02:00
test12.c New sources layout 2014-07-31 16:00:30 +02:00
test13.c New sources layout 2014-07-31 16:00:30 +02:00
test14.c New sources layout 2014-07-31 16:00:30 +02:00
test15.c New sources layout 2014-07-31 16:00:30 +02:00
test16.c New sources layout 2014-07-31 16:00:30 +02:00
test17.c New sources layout 2014-07-31 16:00:30 +02:00
test18.c New sources layout 2014-07-31 16:00:30 +02:00
test19.c New sources layout 2014-07-31 16:00:30 +02:00
test20.c New sources layout 2014-07-31 16:00:30 +02:00
test21.c New sources layout 2014-07-31 16:00:30 +02:00
test22.c New sources layout 2014-07-31 16:00:30 +02:00
test23.c New sources layout 2014-07-31 16:00:30 +02:00
test24.c New sources layout 2014-07-31 16:00:30 +02:00
test25.c New sources layout 2014-07-31 16:00:30 +02:00
test26.c New sources layout 2014-07-31 16:00:30 +02:00
test27.c New sources layout 2014-07-31 16:00:30 +02:00
test28.c New sources layout 2014-07-31 16:00:30 +02:00
test29.c New sources layout 2014-07-31 16:00:30 +02:00
test30.c New sources layout 2014-07-31 16:00:30 +02:00
test31.c New sources layout 2014-07-31 16:00:30 +02:00
test32.c New sources layout 2014-07-31 16:00:30 +02:00
test33.c New sources layout 2014-07-31 16:00:30 +02:00
test34.c tests: fix clang warnings 2014-09-29 16:16:32 +00:00
test35.c tests: fix clang warnings 2014-09-29 16:16:32 +00:00
test36.c New sources layout 2014-07-31 16:00:30 +02:00
test37.c tests: fix clang warnings 2014-09-29 16:16:32 +00:00
test38.c New sources layout 2014-07-31 16:00:30 +02:00
test39.c New sources layout 2014-07-31 16:00:30 +02:00
test40.c New sources layout 2014-07-31 16:00:30 +02:00
test41.c New sources layout 2014-07-31 16:00:30 +02:00
test42.c tests: fix clang warnings 2014-09-29 16:16:32 +00:00
test43.c New sources layout 2014-07-31 16:00:30 +02:00
test44.c New sources layout 2014-07-31 16:00:30 +02:00
test45.c New sources layout 2014-07-31 16:00:30 +02:00
test45.h New sources layout 2014-07-31 16:00:30 +02:00
test46.c tests: fix clang warnings 2014-09-29 16:16:32 +00:00
test47.c New sources layout 2014-07-31 16:00:30 +02:00
test48.c fix test48 - minix3.org.xyz resolves now 2014-08-22 12:38:09 +02:00
test49.c New sources layout 2014-07-31 16:00:30 +02:00
test50.c New sources layout 2014-07-31 16:00:30 +02:00
test51.c tests: fix clang warnings 2014-09-29 16:16:32 +00:00
test52.c New sources layout 2014-07-31 16:00:30 +02:00
test53.c New sources layout 2014-07-31 16:00:30 +02:00
test54.c New sources layout 2014-07-31 16:00:30 +02:00
test55.c New sources layout 2014-07-31 16:00:30 +02:00
test56.c test56: fix race condition 2014-09-29 16:16:36 +00:00
test57.c New sources layout 2014-07-31 16:00:30 +02:00
test57loop.S New sources layout 2014-07-31 16:00:30 +02:00
test58.c New sources layout 2014-07-31 16:00:30 +02:00
test59.c test59: fix status type for mthread_join call 2014-08-24 09:22:35 +00:00
test60.c New sources layout 2014-07-31 16:00:30 +02:00
test61.c New sources layout 2014-07-31 16:00:30 +02:00
test62.c New sources layout 2014-07-31 16:00:30 +02:00
test63.c New sources layout 2014-07-31 16:00:30 +02:00
test64.c New sources layout 2014-07-31 16:00:30 +02:00
test65.c New sources layout 2014-07-31 16:00:30 +02:00
test66.c New sources layout 2014-07-31 16:00:30 +02:00
test66expected.h New sources layout 2014-07-31 16:00:30 +02:00
test67.c New sources layout 2014-07-31 16:00:30 +02:00
test68.c Fix fcntl(F_[GS]ETNOSIGPIPE) semantics 2014-11-01 12:57:31 +00:00
test69.c New sources layout 2014-07-31 16:00:30 +02:00
test70.c New sources layout 2014-07-31 16:00:30 +02:00
test71.c New sources layout 2014-07-31 16:00:30 +02:00
test72.c libfsdriver: support mmap on FSes with no device 2014-11-15 11:19:52 +00:00
test73.c libminixfs: add block I/O routines 2014-09-18 12:46:25 +00:00
test74.c VM: fix for handling one-shot page memory 2015-02-10 13:47:27 +00:00
test75.c New sources layout 2014-07-31 16:00:30 +02:00
test76.c test76: increase alarm times 2014-11-12 12:12:40 +00:00
test77.c VFS: unbreak select on /dev/tty 2014-08-28 16:30:48 +00:00
test78.c New sources layout 2014-07-31 16:00:30 +02:00
test79.c New sources layout 2014-07-31 16:00:30 +02:00
testcache.c New sources layout 2014-07-31 16:00:30 +02:00
testcache.h New sources layout 2014-07-31 16:00:30 +02:00
testinterp.sh New sources layout 2014-07-31 16:00:30 +02:00
testisofs.sh tests: reenable testisofs 2014-09-18 13:01:13 +00:00
testkyua.sh New sources layout 2014-07-31 16:00:30 +02:00
testmfs.sh New sources layout 2014-07-31 16:00:30 +02:00
testrelpol.sh Restart policies: Add testing and ProcFS DB 2014-12-10 23:11:25 +01:00
testsh1.sh Porting uuencode/uudecode from NetBSD 2014-09-08 19:51:28 +02:00
testsh2.sh New sources layout 2014-07-31 16:00:30 +02:00
testvm.c libfsdriver: support mmap on FSes with no device 2014-11-15 11:19:52 +00:00
testvm.conf New sources layout 2014-07-31 16:00:30 +02:00
testvm.h New sources layout 2014-07-31 16:00:30 +02:00
testvnd.sh Importing bin/sh 2014-08-29 12:56:04 -04:00
tvnd.c New sources layout 2014-07-31 16:00:30 +02:00