btrfs: introduce submit_eb_subpage() to submit a subpage metadata page

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The new function, submit_eb_subpage(), will submit all the dirty extent
buffers in the page.

The major difference between submit_eb_page() and submit_eb_subpage()
is:
- How to grab extent buffer
  Now we use find_extent_buffer_nospinlock() other than using
  page::private.

All other different handling is already done in functions like
lock_extent_buffer_for_io() and write_one_eb().

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Qu Wenruo 2021-04-06 08:36:03 +08:00 • committed by David Sterba

parent f3156df944

commit c4aec299fa

1 changed files with 95 additions and 0 deletions

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fs/btrfs/extent_io.c

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