kernel/git/stable/linux.git/fs/f2fs/data.c, branch linux-3.15.y

f2fs: adjust free mem size to flush dentry blocks

2014-07-17T23:23:19+00:00

commit 6fb03f3a40805a412c9b285010ffdc2e7563f81b upstream. If so many dirty dentry blocks are cached, not reached to the flush condition, we should fall into livelock in balance_dirty_pages. So, let's consider the mem size for the condition. Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman

f2fs: submit bio at the reclaim path

2014-07-01T03:14:01+00:00

commit 2aea39eca6b68d6ae7eb545332df0695f56a3d3f upstream. If f2fs_write_data_page is called through the reclaim path, we should submit the bio right away. This patch resolves the following issue that Marc Dietrich reported. "It took me a while to bisect a problem which causes my ARM (tegra2) netbook to frequently stall for 5-10 seconds when I enable EXA acceleration (opentegra experimental ddx)." And this patch fixes that. Reported-by: Marc Dietrich Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman

f2fs: fix error path when fail to read inline data

2014-04-02T00:56:27+00:00

We should unlock page in ->readpage() path and also should unlock & release page in error path of ->write_begin() to avoid deadlock or memory leak. So let's add release code to fix the problem when we fail to read inline data. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: avoid unnecessary bio submit when wait page writeback

2014-04-01T09:53:41+00:00

This patch introduce is_merged_page() to check whether current page is merged in f2fs bio cache. When page is not in cache, we can avoid submitting bio cache, resulting in having more chance to merge pages. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: introduce nr_pages_to_write for segment alignment

2014-03-18T07:37:53+00:00

This patch introduces nr_pages_to_write to align page writes to the segment or other operational unit size, which can be tuned according to the system environment. Signed-off-by: Jaegeuk Kim

f2fs: increase pages_skipped when skipping writepages

2014-03-18T07:37:16+00:00

This patch increases pages_skipped when skipping writepages. Signed-off-by: Jaegeuk Kim

f2fs: avoid small data writes by skipping writepages

2014-03-18T04:58:59+00:00

This patch introduces nr_pages_to_skip(sbi, type) to determine writepages can be skipped. The dentry, node, and meta pages can be conrolled by F2FS without breaking the FS consistency. Signed-off-by: Jaegeuk Kim

f2fs: fix dirty page accounting when redirty

2014-02-28T04:09:08+00:00

We should de-account dirty counters for page when redirty in ->writepage(). Wu Fengguang described in 'commit 971767caf632190f77a40b4011c19948232eed75': "writeback: fix dirtied pages accounting on redirty De-account the accumulative dirty counters on page redirty. Page redirties (very common in ext4) will introduce mismatch between counters (a) and (b) a) NR_DIRTIED, BDI_DIRTIED, tsk->nr_dirtied b) NR_WRITTEN, BDI_WRITTEN This will introduce systematic errors in balanced_rate and result in dirty page position errors (ie. the dirty pages are no longer balanced around the global/bdi setpoints)." Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix not to write data pages on the page reclaiming path

2014-02-24T07:00:33+00:00

Even if f2fs_write_data_page is called by the page reclaiming path, we should not write the page to provide enough free segments for the worst case scenario. Otherwise, f2fs can face with no free segment while gc is conducted, resulting in: ------------[ cut here ]------------ kernel BUG at /home/zeus/f2fs_test/src/fs/f2fs/segment.c:565! RIP: 0010:[] [] new_curseg+0x331/0x340 [f2fs] Call Trace: allocate_segment_by_default+0x204/0x280 [f2fs] allocate_data_block+0x108/0x210 [f2fs] write_data_page+0x8a/0xc0 [f2fs] do_write_data_page+0xe1/0x2a0 [f2fs] move_data_page+0x8a/0xf0 [f2fs] f2fs_gc+0x446/0x970 [f2fs] f2fs_balance_fs+0xb6/0xd0 [f2fs] f2fs_write_begin+0x50/0x350 [f2fs] ? unlock_page+0x27/0x30 ? unlock_page+0x27/0x30 generic_file_buffered_write+0x10a/0x280 ? file_update_time+0xa3/0xf0 __generic_file_aio_write+0x1c8/0x3d0 ? generic_file_aio_write+0x52/0xb0 ? generic_file_aio_write+0x52/0xb0 generic_file_aio_write+0x65/0xb0 do_sync_write+0x5a/0x90 vfs_write+0xc5/0x1f0 SyS_write+0x55/0xa0 system_call_fastpath+0x16/0x1b Signed-off-by: Jaegeuk Kim

f2fs: clean up redundant function call

2014-02-17T05:58:53+00:00

This patch integrates inode_[inc|dec]_dirty_dents with inc_page_count to remove redundant calls. Signed-off-by: Jaegeuk Kim