fs: don't allocate blocks beyond EOF from __mpage_writepage

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When __mpage_writepage() is called for a page beyond EOF, it will go and
allocate all blocks underlying the page.  This is not only unnecessary but
this way blocks can get leaked (e.g.  if a page beyond EOF is marked dirty
but in the end write fails and i_size is not extended).

Link: https://lkml.kernel.org/r/20230103104430.27749-1-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Jan Kara 2023-01-03 11:44:30 +01:00 • committed by Andrew Morton

parent 6c364edc19

commit 4b89a37d54

1 changed files with 6 additions and 0 deletions

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fs/mpage.c

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