From: Daan De Meyer <daan.j.demeyer@gmail.com>
Date: Wed, 23 Oct 2024 09:50:15 +0000 (+0200)
Subject: Set qemu drive caching options for qemu drives as well
X-Git-Tag: v25~211
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=885f5cc8350ca139f28d72bd31b30fa871014042;p=thirdparty%2Fmkosi.git

Set qemu drive caching options for qemu drives as well

We already set these for the scratch device, let's make sure we set
them for any drives we allocate as well.

We also make sure the drive size is aligned to the page size so qemu
can use O_DIRECT.
---

diff --git a/mkosi/qemu.py b/mkosi/qemu.py
index d2534d06f..511f41062 100644
--- a/mkosi/qemu.py
+++ b/mkosi/qemu.py
@@ -752,7 +752,7 @@ def finalize_drive(config: Config, drive: QemuDrive) -> Iterator[Path]:
         prefix=f"mkosi-drive-{drive.id}",
     ) as file:
         make_nocow(config, Path(file.name))
-        file.truncate(drive.size)
+        file.truncate(round_up(drive.size, resource.getpagesize()))
         yield Path(file.name)
 
 
@@ -1348,7 +1348,7 @@ def run_qemu(args: Args, config: Config) -> None:
             file = stack.enter_context(finalize_drive(config, drives[0]))
 
             for drive in drives:
-                arg = f"if=none,id={drive.id},file={file},format=raw,file.locking=off"
+                arg = f"if=none,id={drive.id},file={file},format=raw,file.locking=off,cache.writeback=on,cache.direct=on,cache.no-flush=yes,aio=io_uring"  # noqa: E501
                 if drive.options:
                     arg += f",{drive.options}"