lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Fix congestion_wait() sync/async vs read/write confusion

Browse Source 
Commit 1faa16d228 accidentally broke
the bdi congestion wait queue logic, causing us to wait on congestion
for WRITE (== 1) when we really wanted BLK_RW_ASYNC (== 0) instead.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe
2009-07-09 14:52:32 +02:00
committed by Jens Axboe
parent c2cc49a2f8
commit 8aa7e847d8
16 changed files with 43 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
fs/nfs/write.c
View File

@@ -202,8 +202,10 @@ static int nfs_set_page_writeback(struct page *page)
struct nfs_server *nfss = NFS_SERVER(inode);
if (atomic_long_inc_return(&nfss->writeback) >
NFS_CONGESTION_ON_THRESH)
set_bdi_congested(&nfss->backing_dev_info, WRITE);
NFS_CONGESTION_ON_THRESH) {
set_bdi_congested(&nfss->backing_dev_info,
BLK_RW_ASYNC);
}
}
return ret;
}
@@ -215,7 +217,7 @@ static void nfs_end_page_writeback(struct page *page)
end_page_writeback(page);
if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH)
clear_bdi_congested(&nfss->backing_dev_info, WRITE);
clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC);
}
/*