Hi,
> Hi,
>
> > Wang Yugui has a workload which would be improved by using large folios.
> > Until now, we've only created large folios in the readahead path,
> > but this workload writes without reading. The decision of what size
> > folio to create is based purely on the size of the write() call (unlike
> > readahead where we keep history and can choose to create larger folios
> > based on that history even if individual reads are small).
> >
> > The third patch looks like it's an optional extra but is actually needed
> > for the first two patches to work in the write path, otherwise it limits
> > the length that iomap_get_folio() sees to PAGE_SIZE.
> >
> > Matthew Wilcox (Oracle) (3):
> > filemap: Allow __filemap_get_folio to allocate large folios
> > iomap: Create large folios in the buffered write path
> > iomap: Copy larger chunks from userspace
>
> The [PATCH 2/3] is a little difficult to backport to 6.1.y(LTS),
> it need some patches as depency.
>
> so please provide those patches based on 6.1.y(LTS) and depency list?
> then we can do more test on 6.1.y(LTS) too.
I selected 8 patches as depency
d7b64041164c :Dave Chinner: iomap: write iomap validity checks
7a70a5085ed0 :Andreas Gruenbacher: iomap: Add __iomap_put_folio helper
80baab88bb93 :Andreas Gruenbacher: iomap/gfs2: Unlock and put folio in page_done handler
40405dddd98a :Andreas Gruenbacher: iomap: Rename page_done handler to put_folio
98321b5139f9 :Andreas Gruenbacher: iomap: Add iomap_get_folio helper
9060bc4d3aca :Andreas Gruenbacher: iomap/gfs2: Get page in page_prepare handler
07c22b56685d :Andreas Gruenbacher: iomap: Add __iomap_get_folio helper
c82abc239464 :Andreas Gruenbacher: iomap: Rename page_prepare handler to get_folio
then rebased path 1, 2 ( see attachment files).
Now we can test patch 1,2,3 on 5.1.31.
Best Regards
Wang Yugui (wangyugui@xxxxxxxxxxxx)
2023/05/31
Attachment:
0001-filemap-Allow-__filemap_get_folio-to-allocate-large-.patch
Description: Binary data
Attachment:
0002-iomap-Create-large-folios-in-the-buffered-write-path.patch
Description: Binary data
