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| -rw-r--r-- | user/Maksym_Planeta.mdwn | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/user/Maksym_Planeta.mdwn b/user/Maksym_Planeta.mdwn index f9436668..a72c277b 100644 --- a/user/Maksym_Planeta.mdwn +++ b/user/Maksym_Planeta.mdwn @@ -87,3 +87,14 @@ To debug tmpfs, using libraries from "$PWD"/lib and trace rpc: (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 + + ... + + (15:23:33) antrik: mcsim: vm_allocate doesn't return a memory object; so it can't be passed to clients for mmap() + (15:50:37) mcsim: antrik: I use vm_allocate in pager_read_page + (15:54:43) antrik: mcsim: well, that means that you have to actually implement a pager yourself + (15:56:10) antrik: also, when the kernel asks the pager to write back some pages, it expects the memory to become free. + if you are "paging" to ordinary anonymous memory, this doesn't happen; so I expect it to have a very bad effect + on system performance + (15:56:54) antrik: both can be avoided by just passing a real anonymous memory object, i.e. one provided by the defpager + (15:57:07) antrik: only problem is that the current defpager implementation can't really handle that... |