Commit f2b1c41cf94d7f839fe9ede5f3ead92698a93fb3
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Btrfs: Make sure pages are dirty before doing delalloc for them
This adds a PageDirty check to the writeback path that locks pages for delalloc. If a page wasn't dirty at this point, it is in the process of being truncated away. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Showing 1 changed file with 2 additions and 1 deletions Side-by-side Diff
fs/btrfs/extent_io.c
| ... | ... | @@ -1205,7 +1205,8 @@ |
| 1205 | 1205 | */ |
| 1206 | 1206 | if (pages[i] != locked_page) { |
| 1207 | 1207 | lock_page(pages[i]); |
| 1208 | - if (pages[i]->mapping != inode->i_mapping) { | |
| 1208 | + if (!PageDirty(pages[i]) || | |
| 1209 | + pages[i]->mapping != inode->i_mapping) { | |
| 1209 | 1210 | ret = -EAGAIN; |
| 1210 | 1211 | unlock_page(pages[i]); |
| 1211 | 1212 | page_cache_release(pages[i]); |