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mm/writeback: Add wait_on_page_writeback_killable

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This is the killable version of wait_on_page_writeback.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: kafs-testing@auristor.com
cc: linux-afs@lists.infradead.org
cc: linux-mm@kvack.org
Link: https://lore.kernel.org/r/20210320054104.1300774-3-willy@infradead.org
This commit is contained in:
Matthew Wilcox (Oracle) 2021-03-20 05:40:39 +00:00 committed by David Howells
parent 39f985c8f6
commit e5dbd33218
2 changed files with 17 additions and 0 deletions
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1
include/linux/pagemap.h
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@ -682,6 +682,7 @@ static inline int wait_on_page_locked_killable(struct page *page)
int put_and_wait_on_page_locked(struct page *page, int state);
void wait_on_page_writeback(struct page *page);
int wait_on_page_writeback_killable(struct page *page);
extern void end_page_writeback(struct page *page);
void wait_for_stable_page(struct page *page);

16
mm/page-writeback.c
View file

@ -2833,6 +2833,22 @@ void wait_on_page_writeback(struct page *page)
}
EXPORT_SYMBOL_GPL(wait_on_page_writeback);
/*
* Wait for a page to complete writeback. Returns -EINTR if we get a
* fatal signal while waiting.
*/
int wait_on_page_writeback_killable(struct page *page)
{
while (PageWriteback(page)) {
trace_wait_on_page_writeback(page, page_mapping(page));
if (wait_on_page_bit_killable(page, PG_writeback))
return -EINTR;
}
return 0;
}
EXPORT_SYMBOL_GPL(wait_on_page_writeback_killable);
/**
* wait_for_stable_page() - wait for writeback to finish, if necessary.
* @page: The page to wait on.