From 151fecfb72a0d602dfe79790602ef64b4e241574 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 19 Feb 2024 01:51:07 +0000
Subject: [PATCH] export RK_PA3
---
kernel/fs/nilfs2/page.c | 58 ++++++++++++++++++++++++++++++----------------------------
1 files changed, 30 insertions(+), 28 deletions(-)
diff --git a/kernel/fs/nilfs2/page.c b/kernel/fs/nilfs2/page.c
index 329a056..81992b9 100644
--- a/kernel/fs/nilfs2/page.c
+++ b/kernel/fs/nilfs2/page.c
@@ -69,7 +69,6 @@
/**
* nilfs_forget_buffer - discard dirty state
- * @inode: owner inode of the buffer
* @bh: buffer head of the buffer to be discarded
*/
void nilfs_forget_buffer(struct buffer_head *bh)
@@ -289,7 +288,7 @@
* @dmap: destination page cache
* @smap: source page cache
*
- * No pages must no be added to the cache during this process.
+ * No pages must be added to the cache during this process.
* This must be ensured by the caller.
*/
void nilfs_copy_back_pages(struct address_space *dmap,
@@ -298,7 +297,6 @@
struct pagevec pvec;
unsigned int i, n;
pgoff_t index = 0;
- int err;
pagevec_init(&pvec);
repeat:
@@ -313,35 +311,34 @@
lock_page(page);
dpage = find_lock_page(dmap, offset);
if (dpage) {
- /* override existing page on the destination cache */
+ /* overwrite existing page in the destination cache */
WARN_ON(PageDirty(dpage));
nilfs_copy_page(dpage, page, 0);
unlock_page(dpage);
put_page(dpage);
+ /* Do we not need to remove page from smap here? */
} else {
- struct page *page2;
+ struct page *p;
/* move the page to the destination cache */
xa_lock_irq(&smap->i_pages);
- page2 = radix_tree_delete(&smap->i_pages, offset);
- WARN_ON(page2 != page);
-
+ p = __xa_erase(&smap->i_pages, offset);
+ WARN_ON(page != p);
smap->nrpages--;
xa_unlock_irq(&smap->i_pages);
xa_lock_irq(&dmap->i_pages);
- err = radix_tree_insert(&dmap->i_pages, offset, page);
- if (unlikely(err < 0)) {
- WARN_ON(err == -EEXIST);
+ p = __xa_store(&dmap->i_pages, offset, page, GFP_NOFS);
+ if (unlikely(p)) {
+ /* Probably -ENOMEM */
page->mapping = NULL;
- put_page(page); /* for cache */
+ put_page(page);
} else {
page->mapping = dmap;
dmap->nrpages++;
if (PageDirty(page))
- radix_tree_tag_set(&dmap->i_pages,
- offset,
- PAGECACHE_TAG_DIRTY);
+ __xa_set_mark(&dmap->i_pages, offset,
+ PAGECACHE_TAG_DIRTY);
}
xa_unlock_irq(&dmap->i_pages);
}
@@ -372,7 +369,15 @@
struct page *page = pvec.pages[i];
lock_page(page);
- nilfs_clear_dirty_page(page, silent);
+
+ /*
+ * This page may have been removed from the address
+ * space by truncation or invalidation when the lock
+ * was acquired. Skip processing in that case.
+ */
+ if (likely(page->mapping == mapping))
+ nilfs_clear_dirty_page(page, silent);
+
unlock_page(page);
}
pagevec_release(&pvec);
@@ -393,9 +398,8 @@
BUG_ON(!PageLocked(page));
if (!silent)
- nilfs_msg(sb, KERN_WARNING,
- "discard dirty page: offset=%lld, ino=%lu",
- page_offset(page), inode->i_ino);
+ nilfs_warn(sb, "discard dirty page: offset=%lld, ino=%lu",
+ page_offset(page), inode->i_ino);
ClearPageUptodate(page);
ClearPageMappedToDisk(page);
@@ -411,9 +415,9 @@
do {
lock_buffer(bh);
if (!silent)
- nilfs_msg(sb, KERN_WARNING,
- "discard dirty block: blocknr=%llu, size=%zu",
- (u64)bh->b_blocknr, bh->b_size);
+ nilfs_warn(sb,
+ "discard dirty block: blocknr=%llu, size=%zu",
+ (u64)bh->b_blocknr, bh->b_size);
set_mask_bits(&bh->b_state, clear_bits, 0);
unlock_buffer(bh);
@@ -452,10 +456,9 @@
/*
* NILFS2 needs clear_page_dirty() in the following two cases:
*
- * 1) For B-tree node pages and data pages of the dat/gcdat, NILFS2 clears
- * page dirty flags when it copies back pages from the shadow cache
- * (gcdat->{i_mapping,i_btnode_cache}) to its original cache
- * (dat->{i_mapping,i_btnode_cache}).
+ * 1) For B-tree node pages and data pages of DAT file, NILFS2 clears dirty
+ * flag of pages when it copies back pages from shadow cache to the
+ * original cache.
*
* 2) Some B-tree operations like insertion or deletion may dispose buffers
* in dirty state, and this needs to cancel the dirty state of their pages.
@@ -467,8 +470,7 @@
if (mapping) {
xa_lock_irq(&mapping->i_pages);
if (test_bit(PG_dirty, &page->flags)) {
- radix_tree_tag_clear(&mapping->i_pages,
- page_index(page),
+ __xa_clear_mark(&mapping->i_pages, page_index(page),
PAGECACHE_TAG_DIRTY);
xa_unlock_irq(&mapping->i_pages);
return clear_page_dirty_for_io(page);
--
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