On 20.12.24 16:12, Kirill A. Shutemov wrote:
On Fri, Dec 20, 2024 at 04:03:44PM +0100, David Hildenbrand wrote:
On 20.12.24 12:08, Kirill A. Shutemov wrote:
On Fri, Dec 13, 2024 at 08:55:18AM -0700, Jens Axboe wrote:
Add a folio flag that file IO can use to indicate that the cached IO
being done should be dropped from the page cache upon completion.
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
+ David, Vlastimil.
I think we should consider converting existing folio_set_reclaim() /
SetPageReclaim() users to the new flag. From a quick scan, all of them
would benefit from dropping the page after writeback is complete instead
of leaving the folio on the LRU.
I wonder of there are some use cases where we write a lot of data to then
only consume it read-only from that point on (databases? fancy AI stuff? no
idea :) ).
Do we use PG_reclaim for such cases?
Good point, I looked at the pageout() case, but there we really want to
pageout that thing and not just write it back, so makes sense to me.
--
Cheers,
David / dhildenb
