From cc7b1bb173676621b092b61d22d8d12b05efb5e8 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Sun, 22 Sep 2013 15:50:50 +0800 Subject: [PATCH] f2fs: avoid allocating failure in bio_alloc This patch add macro MAX_BIO_BLOCKS to limit value of npages in f2fs_bio_alloc, it can avoid allocating failure in bio_alloc caused by npages is larger than BIO_MAX_PAGES. Signed-off-by: Yu Chao Reviewed-by: Gu Zheng Signed-off-by: Jaegeuk Kim --- fs/f2fs/segment.c | 4 +++- fs/f2fs/segment.h | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 09af9c7b0f52..bd79bbeceb1d 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -657,6 +657,7 @@ static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page, block_t blk_addr, enum page_type type) { struct block_device *bdev = sbi->sb->s_bdev; + int bio_blocks; verify_block_addr(sbi, blk_addr); @@ -676,7 +677,8 @@ static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page, goto retry; } - sbi->bio[type] = f2fs_bio_alloc(bdev, max_hw_blocks(sbi)); + bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); + sbi->bio[type] = f2fs_bio_alloc(bdev, bio_blocks); sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); sbi->bio[type]->bi_private = priv; /* diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index bdd10eab8c40..7f94d78cda3d 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -90,6 +90,8 @@ (blk_addr << ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE)) #define SECTOR_TO_BLOCK(sbi, sectors) \ (sectors >> ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE)) +#define MAX_BIO_BLOCKS(max_hw_blocks) \ + (min((int)max_hw_blocks, BIO_MAX_PAGES)) /* during checkpoint, bio_private is used to synchronize the last bio */ struct bio_private {