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| author | Liu Bo <bo.li.liu@oracle.com> | 2016-07-11 20:39:07 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-07-26 14:52:25 +0300 |
| commit | baf863b9c29617cc9eaf24e039f58846e700db48 (patch) | |
| tree | 916fe6a7c3967160de5d6d991dd6e1088953add8 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | f49070957ffed84feb7944550f7edd53672b5201 (diff) | |
| download | linux-baf863b9c29617cc9eaf24e039f58846e700db48.tar.xz | |
Btrfs: fix eb memory leak due to readpage failure
eb->io_pages is set in read_extent_buffer_pages().
In case of readpage failure, for pages that have been added to bio,
it calls bio_endio and later readpage_io_failed_hook() does the work.
When this eb's page (couldn't be the 1st page) fails to add itself to bio
due to failure in merge_bio(), it cannot decrease eb->io_pages via bio_endio,
and ends up with a memory leak eventually.
This lets __do_readpage propagate errors to callers and adds the
'atomic_dec(&eb->io_pages)'.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions