xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

page cache: Convert hole search to XArray

Browse Source 
The page cache offers the ability to search for a miss in the previous or
next N locations.  Rather than teach the XArray about the page cache's
definition of a miss, use xas_prev() and xas_next() to search the page
array.  This should be more efficient as it does not have to start the
lookup from the top for each index.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox
2017-11-21 14:07:06 -05:00
parent eb797a8ee0
commit 0d3f929666
4 changed files with 49 additions and 59 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/nfs/blocklayout/blocklayout.c
View File

@@ -896,7 +896,7 @@ static u64 pnfs_num_cont_bytes(struct inode *inode, pgoff_t idx)
end = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
if (end != inode->i_mapping->nrpages) {
rcu_read_lock();
end = page_cache_next_hole(mapping, idx + 1, ULONG_MAX);
end = page_cache_next_miss(mapping, idx + 1, ULONG_MAX);
rcu_read_unlock();
}