mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
staging: erofs: decompress asynchronously if PG_readahead page at first
For the case of nr_to_read == lookahead_size, it is better to decompress asynchronously as well since no page will be needed immediately. Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
23edf3abe7
commit
2d9b5dcd99
1 changed files with 8 additions and 1 deletions
|
@ -1345,8 +1345,8 @@ static int z_erofs_vle_normalaccess_readpages(struct file *filp,
|
|||
{
|
||||
struct inode *const inode = mapping->host;
|
||||
struct erofs_sb_info *const sbi = EROFS_I_SB(inode);
|
||||
const bool sync = __should_decompress_synchronously(sbi, nr_pages);
|
||||
|
||||
bool sync = __should_decompress_synchronously(sbi, nr_pages);
|
||||
struct z_erofs_vle_frontend f = VLE_FRONTEND_INIT(inode);
|
||||
gfp_t gfp = mapping_gfp_constraint(mapping, GFP_KERNEL);
|
||||
struct page *head = NULL;
|
||||
|
@ -1364,6 +1364,13 @@ static int z_erofs_vle_normalaccess_readpages(struct file *filp,
|
|||
prefetchw(&page->flags);
|
||||
list_del(&page->lru);
|
||||
|
||||
/*
|
||||
* A pure asynchronous readahead is indicated if
|
||||
* a PG_readahead marked page is hitted at first.
|
||||
* Let's also do asynchronous decompression for this case.
|
||||
*/
|
||||
sync &= !(PageReadahead(page) && !head);
|
||||
|
||||
if (add_to_page_cache_lru(page, mapping, page->index, gfp)) {
|
||||
list_add(&page->lru, &pagepool);
|
||||
continue;
|
||||
|
|
Loading…
Reference in a new issue