On 3/31/23 12:37 PM, Yuanchu Xie wrote:
> As of Linux kernel commit 17e810229cb3 ("mm: support
> POSIX_FADV_NOREUSE"), POSIX_FADV_NOREUSE hints at the LRU algorithm to
> ignore accesses to mapped files with this flag. Previously, it was a
> no-op.
>
> Add it in fio as an fadvise_hint option to test the new behavior.
I just applied this, but then I pondered if we'll be breaking normal
installs that don't have POSIX_FADV_NOREUSE available? Maybe the
libc define predates the kernel actually implementing it by long
enough that this doesn't matter? Let's see what happens...
--
Jens Axboe
