mirrors/krata
1
0
Fork 0
mirror of https://github.com/edera-dev/krata.git synced 2025-08-03 13:11:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

xenclient: auto-retry mmapbatch when paging state issues occur

Browse Source
This commit is contained in:
Alex Zenla
2024-01-20 20:29:36 -08:00
parent 83264839dd
commit 001c22fd69
3 changed files with 83 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
xencall/src/lib.rs
View File

@ -13,7 +13,7 @@ use crate::sys::{
XEN_DOMCTL_SET_ADDRESS_SIZE, XEN_DOMCTL_UNPAUSEDOMAIN, XEN_MEM_MEMORY_MAP,
XEN_MEM_POPULATE_PHYSMAP,
};
use libc::{c_int, mmap, MAP_FAILED, MAP_SHARED, PROT_READ, PROT_WRITE};
use libc::{c_int, mmap, usleep, MAP_FAILED, MAP_SHARED, PROT_READ, PROT_WRITE};
use log::trace;
use nix::errno::Errno;
use std::error::Error;
@ -224,8 +224,62 @@ impl XenCall {
mfns: mfns.as_mut_ptr(),
errors: errors.as_mut_ptr(),
};
let result = sys::mmapbatch(self.handle.as_raw_fd(), &mut batch)?;
Ok(result as c_long)
let result = sys::mmapbatch(self.handle.as_raw_fd(), &mut batch);
if let Err(errno) = result {
if errno != Errno::ENOENT {
return Err(errno)?;
}
usleep(100);
let mut i: usize = 0;
let mut paged: usize = 0;
loop {
if errors[i] != libc::ENOENT {
i += 1;
continue;
}
paged += 1;
let mut batch = MmapBatch {
num: 1,
domid: domid as u16,
addr: addr + ((i as u64) << 12),
mfns: mfns.as_mut_ptr().add(i),
errors: errors.as_mut_ptr().add(i),
};
loop {
i += 1;
if i < num as usize {
if errors[i] != libc::ENOENT {
break;
}
batch.num += 1;
}
}
let result = sys::mmapbatch(self.handle.as_raw_fd(), &mut batch);
if let Err(n) = result {
if n != Errno::ENOENT {
return Err(n)?;
}
}
if i < num as usize {
break;
}
let count = result.unwrap();
if count <= 0 {
break;
}
}
return Ok(paged as c_long);
}
Ok(result.unwrap() as c_long)
}
}