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2014-06-04f2fs: fix to recover data written by dioJaegeuk Kim1-0/+12
If data are overwritten through dio, previous f2fs doesn't remain the fsync mark due to no additional node writes. Note that this patch should resolve the xfstests:311. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-06-04f2fs: avoid crash when trace f2fs_submit_page_mbio event in ra_sum_pagesChao Yu1-28/+24
Previously we allocate pages with no mapping in ra_sum_pages(), so we may encounter a crash in event trace of f2fs_submit_page_mbio where we access mapping data of the page. We'd better allocate pages in bd_inode mapping and invalidate these pages after we restore data from pages. It could avoid crash in above scenario. Changes from V1 o remove redundant code in ra_sum_pages() suggested by Jaegeuk Kim. Call Trace: [<f1031630>] ? ftrace_raw_event_f2fs_write_checkpoint+0x80/0x80 [f2fs] [<f10377bb>] f2fs_submit_page_mbio+0x1cb/0x200 [f2fs] [<f103c5da>] restore_node_summary+0x13a/0x280 [f2fs] [<f103e22d>] build_curseg+0x2bd/0x620 [f2fs] [<f104043b>] build_segment_manager+0x1cb/0x920 [f2fs] [<f1032c85>] f2fs_fill_super+0x535/0x8e0 [f2fs] [<c115b66a>] mount_bdev+0x16a/0x1a0 [<f102f63f>] f2fs_mount+0x1f/0x30 [f2fs] [<c115c096>] mount_fs+0x36/0x170 [<c1173635>] vfs_kern_mount+0x55/0xe0 [<c1175388>] do_mount+0x1e8/0x900 [<c1175d72>] SyS_mount+0x82/0xc0 [<c16059cc>] sysenter_do_call+0x12/0x22 Suggested-by: Jaegeuk Kim <jaegeuk.kim@samsung.com> Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-05-07f2fs: add a tracepoint for f2fs_write_{meta,node,data}_pagesChao Yu1-0/+2
This patch adds a tracepoint for f2fs_write_{meta,node,data}_pages to trace when pages are fsyncing/flushing. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add a tracepoint for f2fs_write_{meta,node,data}_pageChao Yu1-0/+2
This patch adds a tracepoint for f2fs_write_{meta,node,data}_page to trace when page is writting out. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: split grab_cache_page and wait_on_page_writeback for node pagesJaegeuk Kim1-4/+4
This patch splits grab_cache_page_write_begin into grab_cache_page and wait_on_page_writeback for node pages. This patch intends to enhance the latency to get node pages by alleviating unnecessary wait_on_page_writeback. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: adjust free mem size to flush dentry blocksJaegeuk Kim1-18/+26
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 <jaegeuk.kim@samsung.com>
2014-05-07f2fs: avoid BUG_ON when mouting corrupted image having garbage blocksJaegeuk Kim1-1/+5
If the disk has some garbage blocks, F2FS is able to face with BUG_ON when recovering direct node blocks. This patch detects the error case and avoids that prior to reaching BUG_ON. Alexey Khoroshilov addressed the potential security issues as follows. "An ability to trigger a BUG_ON assert by mounting a crafted image is usually considered as a local denial of service [1-3]. As far as I understand, the reason is that some kernel data may become inconsistent that can lead to further problems. [1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3353 [2] http://www.openwall.com/lists/oss-security/2011/06/24/4 [3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2928 etc." Reported-by: Andrey Tsyvarev <tsyvarev@ispras.ru> Cc: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add available_nids to fix handling max_nid correctlyJaegeuk Kim1-2/+4
This patch introduces available_nids for alloc_nids() and fixes max_nid for build_free_nids() and scan_nat_pages(). Signed-off-by: Chao Yu <chao2.yu@samsung.com> Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: introduce raw_nat_from_node_info() to simplfy codesChao Yu1-12/+3
This patch introduce raw_nat_from_node_info() to simplfy some codes, and also use exist function node_info_from_raw_nat() to do the same job. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: make recover_inline_xattr() staticJingoo Han1-1/+1
Make recover_inline_xattr() static, because this function is used only in this file. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: call redirty_page_for_writepageJaegeuk Kim1-4/+1
This patch replace some general codes with redirty_page_for_writepage, which can be enabled after consideration on additional procedure like counting dirty pages appropriately. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-04-02f2fs: use list_for_each_entry{_safe} for simplyfying codeChao Yu1-10/+6
This patch use list_for_each_entry{_safe} instead of list_for_each{_safe} for simplfying code. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-04-02f2fs: avoid free slab cache under spinlockChao Yu1-1/+16
Move kmem_cache_free out of spinlock protection region for better performance. Change log from v1: o remove spinlock protection for kmem_cache_free in destroy_node_manager suggested by Jaegeuk Kim. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-04-01f2fs: return -EIO when node id is not matchedJaegeuk Kim1-2/+1
During the cleaing of node segments, F2FS can get errored node blocks due to data race between node page lock and its valid bitmap operations. In that case, it needs to return an error to skip such the obsolete block copy. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-20f2fs: skip unnecessary node writes during fsyncJaegeuk Kim1-9/+28
If multiple redundant fsync calls are triggered, we don't need to write its node pages with fsync mark continuously. So, this patch adds FI_NEED_FSYNC to track whether the latest node block is written with the fsync mark or not. If the mark was set, a new fsync doesn't need to write a node block. Otherwise, we should do a new node block with the mark for roll-forward recovery. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-20f2fs: remove unnecessary thresholdJaegeuk Kim1-4/+1
The NM_WOUT_THRESHOLD is now obsolete since f2fs starts to control on a basis of the memory footprint. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-20f2fs: throttle the memory footprint with a sysfs entryJaegeuk Kim1-3/+20
This patch introduces ram_thresh, a sysfs entry, which controls the memory footprint used by the free nid list and the nat cache. Previously, the free nid list was controlled by MAX_FREE_NIDS, while the nat cache was managed by NM_WOUT_THRESHOLD. However, this approach cannot be applied dynamically according to the system. So, this patch adds ram_thresh that users can specify the threshold, which is in order of 1 / 1024. For example, if the total ram size is 4GB and the value is set to 10 by default, f2fs tries to control the number of free nids and nat caches not to consume over 10 * (4GB / 1024) = 10MB. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-20f2fs: avoid to drop nat entries due to the negative nr_shrinkJaegeuk Kim1-1/+1
The try_to_free_nats should not receive the negative nr_shrink. Otherwise, it can drop all the nat entries by the while loop. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-20f2fs: call f2fs_wait_on_page_writeback instead of native functionJaegeuk Kim1-5/+7
If a page is on writeback, f2fs can face with deadlock due to under writepages. This is caused by merging IOs inside f2fs, so if it comes to detect, let's throw merged IOs, which is implemented by f2fs_wait_on_page_writeback. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-18f2fs: introduce nr_pages_to_write for segment alignmentJaegeuk Kim1-5/+3
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 <jaegeuk.kim@samsung.com>
2014-03-18f2fs: increase pages_skipped when skipping writepagesJaegeuk Kim1-1/+5
This patch increases pages_skipped when skipping writepages. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-18f2fs: avoid small data writes by skipping writepagesJaegeuk Kim1-7/+1
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 <jaegeuk.kim@samsung.com>
2014-03-18f2fs: introduce f2fs_has_xattr_block for better readabilityChao Yu1-2/+2
This patch introduces a help function f2fs_has_xattr_block for better readability. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-12f2fs: introduce f2fs_has_inline_xattr for better readabilityChao Yu1-1/+1
This patch introduces a help function f2fs_has_inline_xattr for better readability. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-11f2fs: recover inline xattr data in roll-forward processChao Yu1-0/+33
Previously we do not recover inline xattr data of inode after power-cut, so inline xattr data may be lost. We should recover the data during the roll-forward process. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-10f2fs: optimize restore_node_summary slightlyGu Zheng1-16/+12
Previously, we ra_sum_pages to pre-read contiguous pages as more as possible, and if we fail to alloc more pages, an ENOMEM error will be reported upstream, even though we have alloced some pages yet. In fact, we can use the available pages to do the job partly, and continue the rest in the following circle. Only reporting ENOMEM upstream if we really can not alloc any available page. And another fix is ignoring dealing with the following pages if an EIO occurs when reading page from page_list. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Reviewed-by: Chao Yu <chao2.yu@samsung.com> [Jaegeuk Kim: modify the flow for better neat code] Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-10f2fs: remove the unused ctor argument of f2fs_kmem_cache_create()Gu Zheng1-2/+2
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-10f2fs: update start nid only once each circleGu Zheng1-5/+3
Integrated a couple of minor changes for better readability suggested by Chao Yu. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-28f2fs: fix dirty page accounting when redirtyChao Yu1-0/+1
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 <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-24f2fs: introduce a radix_tree for the free_nid listJaegeuk Kim1-19/+17
This patch introduces a radix tree for the list of free_nids, which enhances the performance on free nid management. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-24f2fs: introduce help macro on_build_free_nids()Gu Zheng1-3/+3
Introduce help macro on_build_free_nids() which just uses build_lock to judge whether the building free nid is going, so that we can remove the on_build_free_nids field from f2fs_sb_info. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> [Jaegeuk Kim: remove an unnecessary white line removal] Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-24f2fs: fix to mark the checkpointed nat entry correctlyJaegeuk Kim1-6/+1
The nat cache entry maintains a status whether it is checkpointed or not. So, if a new cache entry is loaded from the last checkpoint, nat_entry->checkpointed should be true. If the cache entry is modified as being dirty, nat_entry->checkpoint should be false. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-17f2fs: fix the calculation of max_nidsJaegeuk Kim1-1/+3
Total nids that f2fs can use should not include 0, nid for node inode, and nid for meta inode. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-17f2fs: introduce ra_meta_pages to readahead CP/NAT/SIT pagesChao Yu1-37/+1
This patch help us to cleanup the readahead code by merging ra_{sit,nat}_pages function into ra_meta_pages. Additionally the new function is used to readahead cp block in recover_orphan_inodes. Change log from v1: o fix a deadloop bug pointed by Jaegeuk Kim. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-17f2fs: fix to recover xattr node blockJaegeuk Kim1-0/+40
If a new xattr node page was allocated and its inode is fsynced, we should recover the xattr node page during the roll-forward process after power-cut. But, previously, f2fs didn't handle that case, resulting in kernel panic as follows reported by Tom Li. BUG: unable to handle kernel paging request at ffffc9001c861a98 IP: [<ffffffffa0295236>] check_index_in_prev_nodes+0x86/0x2d0 [f2fs] Call Trace: [<ffffffff815ece9b>] ? printk+0x48/0x4a [<ffffffffa029626a>] recover_fsync_data+0xdca/0xf50 [f2fs] [<ffffffffa02873ae>] f2fs_fill_super+0x92e/0x970 [f2fs] [<ffffffff8112c9f8>] mount_bdev+0x1b8/0x200 [<ffffffffa0286a80>] ? f2fs_remount+0x130/0x130 [f2fs] [<ffffffffa0285e40>] f2fs_mount+0x10/0x20 [f2fs] [<ffffffff8112d4de>] mount_fs+0x3e/0x1b0 [<ffffffff810ef4eb>] ? __alloc_percpu+0xb/0x10 [<ffffffff8114761f>] vfs_kern_mount+0x6f/0x120 [<ffffffff811497b9>] do_mount+0x259/0xa90 [<ffffffff810ead1d>] ? memdup_user+0x3d/0x80 [<ffffffff810eadb3>] ? strndup_user+0x53/0x70 [<ffffffff8114a2c9>] SyS_mount+0x89/0xd0 [<ffffffff815feae2>] system_call_fastpath+0x16/0x1b This patch adds a recovery function of xattr node pages. Reported-by: Tom Li <biergaizi@members.fsf.org> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-01-23f2fs: drop obsolete node page when it is truncatedJaegeuk Kim1-0/+4
If a node page is trucated, we'd better drop the page in the node_inode's page cache for better memory footprint. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-01-22f2fs: introduce NODE_MAPPING for code consistencyJaegeuk Kim1-28/+22
This patch adds NODE_MAPPING which is similar as META_MAPPING introduced by Gu Zheng. Cc: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-01-22f2fs: add help function META_MAPPINGGu Zheng1-1/+1
Introduce help function META_MAPPING() to get the cache meta blocks' address space. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-01-20f2fs: clean checkpatch warningsChris Fries1-1/+1
Fixed a variety of trivial checkpatch warnings. The only delta should be some minor formatting on log strings that were split / too long. Signed-off-by: Chris Fries <cfries@motorola.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-01-08f2fs: improve write performance under frequent fsync callsJaegeuk Kim1-1/+6
When considering a bunch of data writes with very frequent fsync calls, we are able to think the following performance regression. N: Node IO, D: Data IO, IO scheduler: cfq Issue pending IOs D1 D2 D3 D4 D1 D2 D3 D4 N1 D2 D3 D4 N1 N2 N1 D3 D4 N2 D1 --> N1 can be selected by cfq becase of the same priority of N and D. Then D3 and D4 would be delayed, resuling in performance degradation. So, when processing the fsync call, it'd better give higher priority to data IOs than node IOs by assigning WRITE and WRITE_SYNC respectively. This patch improves the random wirte performance with frequent fsync calls by up to 10%. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-01-06f2fs: fix truncate_partial_nodes bugshifei10.ge1-6/+7
The truncate_partial_nodes puts pages incorrectly in the following two cases. Note that the value for argc 'depth' can only be 2 or 3. Please see truncate_inode_blocks() and truncate_partial_nodes(). 1) An err is occurred in the first 'for' loop When err is occurred with depth = 2, pages[0] is invalid, so this page doesn't need to be put. There is no problem, however, when depth is 3, it doesn't put the pages correctly where pages[0] is valid and pages[1] is invalid. In this case, depth is set to 2 (ref to statemnt depth = i + 1), and then 'goto fail'. In label 'fail', for (i = depth - 3; i >= 0; i--) cannot meet the condition because i = -1, so pages[0] cann't be put. 2) An err happened in the second 'for' loop Now we've got pages[0] with depth = 2, or we've got pages[0] and pages[1] with depth = 3. When an err is detected, we need 'goto fail' to put such the pages. When depth is 2, in label 'fail', for (i = depth - 3; i >= 0; i--) cann't meet the condition because i = -1, so pages[0] cann't be put. When depth is 3, in label 'fail', for (i = depth - 3; i >= 0; i--) can only put pages[0], pages[1] also cann't be put. Note that 'depth' has been changed before first 'goto fail' (ref to statemnt depth = i + 1), so passing this modified 'depth' to the tracepoint, trace_f2fs_truncate_partial_nodes, is also incorrect. Signed-off-by: Shifei Ge <shifei10.ge@samsung.com> [Jaegeuk Kim: modify the description and fix one bug] Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-26f2fs: introduce F2FS_INODE macro to get f2fs_inodeJaegeuk Kim1-15/+15
This patch introduces F2FS_INODE that returns struct f2fs_inode * from the inode page. By using this macro, we can remove unnecessary casting codes like below. struct f2fs_inode *ri = &F2FS_NODE(inode_page)->i; -> struct f2fs_inode *ri = F2FS_INODE(inode_page); Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: update several commentsChao Yu1-4/+4
Update several comments: 1. use f2fs_{un}lock_op install of mutex_{un}lock_op. 2. update comment of get_data_block(). 3. update description of node offset. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: remove the rw_flag domain from f2fs_io_infoGu Zheng1-4/+2
When using the f2fs_io_info in the low level, we still need to merge the rw and rw_flag, so use the rw to hold all the io flags directly, and remove the rw_flag field. ps.It is based on the previous patch: f2fs: move all the bio initialization into __bio_alloc Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: refactor bio->rw handlingJaegeuk Kim1-6/+16
This patch introduces f2fs_io_info to mitigate the complex parameter list. struct f2fs_io_info { enum page_type type; /* contains DATA/NODE/META/META_FLUSH */ int rw; /* contains R/RS/W/WS */ int rw_flag; /* contains REQ_META/REQ_PRIO */ } 1. f2fs_write_data_pages - DATA - WRITE_SYNC is set when wbc->WB_SYNC_ALL. 2. sync_node_pages - NODE - WRITE_SYNC all the time 3. sync_meta_pages - META - WRITE_SYNC all the time - REQ_META | REQ_PRIO all the time ** f2fs_submit_merged_bio() handles META_FLUSH. 4. ra_nat_pages, ra_sit_pages, ra_sum_pages - META - READ_SYNC Cc: Fan Li <fanofcode.li@samsung.com> Cc: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: add unlikely() macro for compiler more aggressivelyJaegeuk Kim1-14/+14
This patch adds unlikely() macro into the most of codes. The basic rule is to add that when: - checking unusual errors, - checking page mappings, - and the other unlikely conditions. Change log from v1: - Don't add unlikely for the NULL test and error test: advised by Andi Kleen. Cc: Chao Yu <chao2.yu@samsung.com> Cc: Andi Kleen <andi@firstfloor.org> Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: add unlikely() macro for compiler optimizationChao Yu1-8/+8
As we know, some of our branch condition will rarely be true. So we could add 'unlikely' to let compiler optimize these code, by this way we could drop unneeded 'jump' assemble code to improve performance. change log: o add *unlikely* as many as possible across the whole source files at once suggested by Jaegeuk Kim. Suggested-by: Jaegeuk Kim <jaegeuk.kim@samsung.com> Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: use inner macro GFP_F2FS_ZERO for simplificationChao Yu1-1/+1
Use inner macro GFP_F2FS_ZERO to instead of GFP_NOFS | __GFP_ZERO for simplification of code. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: readahead contiguous pages for restore_node_summaryChao Yu1-26/+63
If cp has no CP_UMOUNT_FLAG, we will read all pages in whole node segment one by one, it makes low performance. So let's merge contiguous pages and readahead for better performance. Signed-off-by: Chao Yu <chao2.yu@samsung.com> [Jaegeuk Kim: adjust the new bio operations] Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: refactor bio-related operationsJaegeuk Kim1-7/+7
This patch integrates redundant bio operations on read and write IOs. 1. Move bio-related codes to the top of data.c. 2. Replace f2fs_submit_bio with f2fs_submit_merged_bio, which handles read bios additionally. 3. Introduce __submit_merged_bio to submit the merged bio. 4. Change f2fs_readpage to f2fs_submit_page_bio. 5. Introduce f2fs_submit_page_mbio to integrate previous submit_read_page and submit_write_page. Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Reviewed-by: Chao Yu <chao2.yu@samsung.com > Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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