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H A D | aops.c | 43388b21 Mon Sep 05 21:06:35 CDT 2016 Al Viro <viro@zeniv.linux.org.uk> fix gfs2_stuffed_write_end() on short copies
a) the page is uptodate - ->write_begin() would either fail (in which case we don't reach ->write_end()), or unstuff the inode, or find the page already uptodate, or do a successful call of stuffed_readpage(), which would've made it uptodate
b) zeroing the tail in pagecache is wrong. kill -9 at the right time while writing unmodified file contents to the same file should _not_ leave us in a situation when read() from the file will be reporting it full of zeroes. Especially since that effect will be transient - at some later point the page will be evicted and then we'll be back to the real file contents.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 43388b21 Mon Sep 05 21:06:35 CDT 2016 Al Viro <viro@zeniv.linux.org.uk> fix gfs2_stuffed_write_end() on short copies a) the page is uptodate - ->write_begin() would either fail (in which case we don't reach ->write_end()), or unstuff the inode, or find the page already uptodate, or do a successful call of stuffed_readpage(), which would've made it uptodate b) zeroing the tail in pagecache is wrong. kill -9 at the right time while writing unmodified file contents to the same file should _not_ leave us in a situation when read() from the file will be reporting it full of zeroes. Especially since that effect will be transient - at some later point the page will be evicted and then we'll be back to the real file contents. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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