Samuka007/asterinas
1
0
Fork 0
mirror of https://github.com/asterinas/asterinas.git synced 2025-06-27 11:23:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Implement MADV_FREE in madvise

Browse Source
This commit is contained in:
Yuke Peng
2024-08-10 10:07:12 +08:00
committed by Tate, Hongliang Tian
parent 75da7fd30e
commit 7b4c13f5d7
1 changed files with 13 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
kernel/aster-nix/src/syscall/madvise.rs
View File

@ -21,11 +21,24 @@ pub fn sys_madvise(start: Vaddr, len: usize, behavior: i32) -> Result<SyscallRet
MadviseBehavior::MADV_DONTNEED => {
warn!("MADV_DONTNEED isn't implemented, do nothing for now.");
}
MadviseBehavior::MADV_FREE => madv_free(start, len)?,
_ => todo!(),
}
Ok(SyscallReturn::Return(0))
}
fn madv_free(start: Vaddr, len: usize) -> Result<()> {
debug_assert!(start % PAGE_SIZE == 0);
debug_assert!(len % PAGE_SIZE == 0);
let current = current!();
let root_vmar = current.root_vmar();
let advised_range = start..start + len;
let _ = root_vmar.destroy(advised_range);
Ok(())
}
#[repr(i32)]
#[derive(Debug, Clone, Copy, TryFromInt)]
#[allow(non_camel_case_types)]