__lock_page

Langue: en

Autres versions - même langue

Version: June 2009 (debian - 07/07/09)

Section: 9 (Appels noyau Linux)

NAME

__lock_page - get a lock on the page, assuming we need to sleep to get it

SYNOPSIS

void __lock_page(struct page * page);

ARGUMENTS

page

the page to lock

DESCRIPTION

Ugly. Running sync_page in state TASK_UNINTERRUPTIBLE is scary. If some random driver's requestfn sets TASK_RUNNING, we could busywait. However chances are that on the second loop, the block layer's plug list is empty, so sync_page will then return in state TASK_UNINTERRUPTIBLE.