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netfs: Allocate multipage folios in the writepath

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Allocate a multipage folio when copying data into the pagecache if possible
if there's sufficient data to warrant it.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
This commit is contained in:
David Howells 2023-09-29 20:11:31 +01:00
parent 7f84a7b989
commit e2e2e83924
1 changed files with 7 additions and 2 deletions
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9
fs/netfs/buffered_write.c
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@ -84,14 +84,19 @@ static enum netfs_how_to_modify netfs_how_to_modify(struct netfs_inode *ctx,
}
/*
* Grab a folio for writing and lock it.
* Grab a folio for writing and lock it. Attempt to allocate as large a folio
* as possible to hold as much of the remaining length as possible in one go.
*/
static struct folio *netfs_grab_folio_for_write(struct address_space *mapping,
loff_t pos, size_t part)
{
pgoff_t index = pos / PAGE_SIZE;
fgf_t fgp_flags = FGP_WRITEBEGIN;
return __filemap_get_folio(mapping, index, FGP_WRITEBEGIN,
if (mapping_large_folio_support(mapping))
fgp_flags |= fgf_set_order(pos % PAGE_SIZE + part);
return __filemap_get_folio(mapping, index, fgp_flags,
mapping_gfp_mask(mapping));
}