mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 20:17:44 +00:00
Kernel: Implement O_DIRECT open() flag to bypass disk caches
Files opened with O_DIRECT will now bypass the disk cache in read/write operations (though metadata operations will still hit the disk cache.) This will allow us to test actual disk performance instead of testing disk *cache* performance, if that's what we want. :^) There's room for improvment here, we're very aggressively flushing any dirty cache entries for the specific block before reading/writing that block. This is done by walking the entire cache, which may be slow.
This commit is contained in:
parent
3de3daf765
commit
59ed235c85
7 changed files with 59 additions and 18 deletions
|
@ -24,6 +24,7 @@
|
|||
#define O_DIRECTORY 00200000
|
||||
#define O_NOFOLLOW 00400000
|
||||
#define O_CLOEXEC 02000000
|
||||
#define O_DIRECT 04000000
|
||||
#define O_NOFOLLOW_NOERROR 0x4000000
|
||||
|
||||
class Custody;
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue