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fuse: don't bump attr_version in cached write

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The attribute version in fuse_inode should be updated whenever the
attributes might have changed on the server.  In case of cached writes this
is not the case, so updating the attr_version is unnecessary and could
possibly affect performance.

Open code the remaining part of fuse_write_update_size().

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2021-10-22 17:03:02 +02:00
parent fa5eee57e3
commit 8c56e03d2e
1 changed files with 5 additions and 2 deletions
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7
fs/fuse/file.c
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@ -2309,15 +2309,18 @@ static int fuse_write_end(struct file *file, struct address_space *mapping,
if (!copied) if (!copied)
goto unlock; goto unlock;
pos += copied;
if (!PageUptodate(page)) { if (!PageUptodate(page)) {
/* Zero any unwritten bytes at the end of the page */ /* Zero any unwritten bytes at the end of the page */
size_t endoff = (pos + copied) & ~PAGE_MASK; size_t endoff = pos & ~PAGE_MASK;
if (endoff) if (endoff)
zero_user_segment(page, endoff, PAGE_SIZE); zero_user_segment(page, endoff, PAGE_SIZE);
SetPageUptodate(page); SetPageUptodate(page);
} }
fuse_write_update_size(inode, pos + copied); if (pos > inode->i_size)
i_size_write(inode, pos);
set_page_dirty(page); set_page_dirty(page);
unlock: unlock: