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Code Issues Releases Wiki Activity

f2fs: Convert f2fs_grab_cache_page() to use scoped memory APIs

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Prevent GFP_FS allocations by using memalloc_nofs_save() instead
of AOP_FLAG_NOFS.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-02-22 09:45:38 -05:00
parent 2d878178ba
commit df8081801d
1 changed files with 8 additions and 1 deletions
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9
fs/f2fs/f2fs.h
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@ -18,6 +18,7 @@
#include <linux/kobject.h>
#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/sched/mm.h>
#include <linux/vmalloc.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
@ -2654,6 +2655,7 @@ static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
pgoff_t index, bool for_write)
{
struct page *page;
unsigned int flags;
if (IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) {
if (!for_write)
@ -2673,7 +2675,12 @@ static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
if (!for_write)
return grab_cache_page(mapping, index);
return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
flags = memalloc_nofs_save();
page = grab_cache_page_write_begin(mapping, index, 0);
memalloc_nofs_restore(flags);
return page;
}
static inline struct page *f2fs_pagecache_get_page(