diff options
Diffstat (limited to 'user/Maksym_Planeta.mdwn')
| -rw-r--r-- | user/Maksym_Planeta.mdwn | 49 |
1 files changed, 48 insertions, 1 deletions
diff --git a/user/Maksym_Planeta.mdwn b/user/Maksym_Planeta.mdwn index e1a4ece3..f9436668 100644 --- a/user/Maksym_Planeta.mdwn +++ b/user/Maksym_Planeta.mdwn @@ -23,20 +23,67 @@ License|/fdl]]."]]"""]] <tschwinge>: The ext2fs translator implements its own backing store, namely it accesses the disk for storing changed file content, or to read in data from disk if a new file is opened. +[[defpager|http://www.bddebian.com:8888/~hurd-web/user/Maksym_Planeta/#defpager81111]] + ## Steps 1. Find out what causes crashes in tmpfs with defpager -http://www.gnu.org/s/hurd/hurd/translator/tmpfs/notes_various.html +[[http://www.gnu.org/s/hurd/hurd/translator/tmpfs/notes_various.html]] 2. Write own pager 6.11.11 Reading/writing for files that fit in vm_page_size works + 7.11.11 Works for any size. +3. Make links work + + Symlinks behavior: [[links|http://www.bddebian.com:8888/~hurd-web/user/Maksym_Planeta/#links81111]] + #Debugging To debug tmpfs, using libraries from "$PWD"/lib and trace rpc: settrans -ca foo /usr/bin/env LD_LIBRARY_PATH="$PWD"/lib utils/rpctrace -I /usr/share/msgids/ tmpfs/tmpfs 1M LD_LIBRARY_PATH="$PWD"/lib gdb tmpfs/tmpfs 698 + +#Conversations + +## 8.11.11 + +### links<a id="links81111"/> + (10:29:11) braunr: mcsim: ln -s foo/bar foo/baz means the link name is baz in the foo directory, + and its target (relative to its directory) is foo/bar (which would mean /tmp/foo/foo/bar in canonical form) + (10:29:42) braunr: youpi: tschwinge: what did ludovic achieve ? + (10:30:06) tschwinge: mcsim: As Richard says, symlink targets are always relative to the directory they're contained in. + (10:30:51) tschwinge: braunr: This Hydra/Nix (I wtill mix it all up) thing is kind of a package managing system. + (10:31:17) tschwinge: He has written scripts for bootstrapping a Hurd toolchain. + (10:31:26) braunr: oh ok + (10:31:27) mcsim: so, if I want to create link in cd, first I need to cd there? + (10:31:28) tschwinge: And then uses that to build a whole bootable image. + (10:31:36) mcsim: in foo* + (10:31:36) braunr: mcsim: just provide the right paths + (10:32:11) braunr: $ touch foo/bar + (10:32:14) braunr: $ ln -s bar foo/baz + (10:32:32) braunr: bar + (10:32:35) braunr: baz -> bar + +### defpager<a id="defpager81111"/> + (10:36:14) mcsim: who else uses defpager besides tmpfs and kernel? + (10:36:27) braunr: normally, nothing directly + (10:37:04) mcsim: than why tmpfs should use defpager? + (10:37:22) braunr: it's its backend + (10:37:28) braunr: backign store rather + (10:37:38) braunr: the backing store of most file systems are partitions + (10:37:44) braunr: tmpfs has none, it uses the swap space + (10:39:31) mcsim: if we allocate memory for tmpfs using vm_allocate, will it be able to use swap partition? + (10:39:56) braunr: it should + (10:40:27) braunr: vm_allocate just maps anonymous memory + (10:41:27) braunr: anonymous memory uses swap space as its backing store too + (10:43:47) braunr: but be aware that this part of the vm system is known to have deficiencies + (10:44:14) braunr: which is why all mach based implementations have rewritten their default pager + (10:44:41) youpi: ArneBab: the intro is already in in my qemu image + (10:45:11) mcsim: what kind of deficiencies? + (10:45:16) braunr: bugs + (10:45:39) braunr: and design issues, making anonymous memory fragmentation horrible |