btrfs: allocate page arrays using bulk page allocator

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While calling alloc_page() in a loop is an effective way to populate an
array of pages, the MM subsystem provides a method to allocate pages in
bulk.  alloc_pages_bulk_array() populates the NULL slots in a page
array, trying to grab more than one page at a time.

Unfortunately, it doesn't guarantee allocating all slots in the array,
but it's easy to call it in a loop and return an error if no progress
occurs.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Sweet Tea Dorminy 2022-03-30 16:11:23 -04:00 • committed by David Sterba

parent dd137dd1f2

commit 91d6ac1d62

1 changed files with 11 additions and 8 deletions

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fs/btrfs/extent_io.c

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