Samuka007/asterinas
1
0
Fork 0
mirror of https://github.com/asterinas/asterinas.git synced 2025-06-24 01:43:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix the concurrency bug when multiple threads committing the same page

Browse Source
This commit is contained in:
Yingdi Shan
2024-06-07 13:55:18 +08:00
committed by Tate, Hongliang Tian
parent 840729d960
commit cea4fd7777
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/aster-nix/src/fs/utils/page_cache.rs
View File

@ -167,9 +167,9 @@ impl Pager for PageCacheManager {
} else {
Page::alloc_zero()?
};
let frame = page.frame().clone();
self.pages.lock().put(idx, page);
Ok(frame)
// If multiple threads commit the same page, only the first allocated page will be perserved.
Ok(self.pages.lock().get_or_insert(idx, || page).frame.clone())
}
fn update_page(&self, idx: usize) -> Result<()> {