lkml.org 
[lkml]   [2018]   [Apr]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] writeback: safer lock nesting
On Fri 06-04-18 01:03:24, Greg Thelen wrote:
[...]
> diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
> index d4d04fee568a..d51bae5a53e2 100644
> --- a/fs/fs-writeback.c
> +++ b/fs/fs-writeback.c
> @@ -746,10 +746,11 @@ int inode_congested(struct inode *inode, int cong_bits)
> if (inode && inode_to_wb_is_valid(inode)) {
> struct bdi_writeback *wb;
> bool locked, congested;
> + unsigned long flags;
>
> - wb = unlocked_inode_to_wb_begin(inode, &locked);
> + wb = unlocked_inode_to_wb_begin(inode, &locked, &flags);

Wouldn't it be better to have a cookie (struct) rather than 2 parameters
and let unlocked_inode_to_wb_end DTRT?

> congested = wb_congested(wb, cong_bits);
> - unlocked_inode_to_wb_end(inode, locked);
> + unlocked_inode_to_wb_end(inode, locked, flags);
> return congested;
> }
--
Michal Hocko
SUSE Labs

\
 
 \ /
  Last update: 2018-04-06 10:08    [W:0.129 / U:0.876 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site