| Message ID | cover.1739710434.git.fdmanana@suse.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | btrfs: some fixes related to the extent map shrinker | expand |
在 2025/2/16 23:46, fdmanana@kernel.org 写道: > From: Filipe Manana <fdmanana@suse.com> > > A few fixes and improvements for the extent map shrinker. The first is a > use-after-free that is likely hard to hit and the other two fixes make > things more efficient by avoiding grabbing and dropping (iput) inodes > which don't have extent maps loaded as well as eleminating the need to > do delayed iputs, as that's not needed anymore. > > These are related to a recent report from Ivan Shapovalov where the > cleaner kthread was using over 50% of CPU doing a lot of delayed iputs: > > https://lore.kernel.org/linux-btrfs/0414d690ac5680d0d77dfc930606cdc36e42e12f.camel@intelfx.name/ > > More details in the change logs. Reviewed-by: Qu Wenruo <wqu@suse.com> Thanks, Qu > > Filipe Manana (3): > btrfs: fix use-after-free on inode when scanning root during em shrinking > btrfs: skip inodes without loaded extent maps when shrinking extent maps > btrfs: do regular iput instead of delayed iput during extent map shrinking > > fs/btrfs/extent_map.c | 82 ++++++++++++++++++++++++++++++------------- > 1 file changed, 58 insertions(+), 24 deletions(-) >
From: Filipe Manana <fdmanana@suse.com> A few fixes and improvements for the extent map shrinker. The first is a use-after-free that is likely hard to hit and the other two fixes make things more efficient by avoiding grabbing and dropping (iput) inodes which don't have extent maps loaded as well as eleminating the need to do delayed iputs, as that's not needed anymore. These are related to a recent report from Ivan Shapovalov where the cleaner kthread was using over 50% of CPU doing a lot of delayed iputs: https://lore.kernel.org/linux-btrfs/0414d690ac5680d0d77dfc930606cdc36e42e12f.camel@intelfx.name/ More details in the change logs. Filipe Manana (3): btrfs: fix use-after-free on inode when scanning root during em shrinking btrfs: skip inodes without loaded extent maps when shrinking extent maps btrfs: do regular iput instead of delayed iput during extent map shrinking fs/btrfs/extent_map.c | 82 ++++++++++++++++++++++++++++++------------- 1 file changed, 58 insertions(+), 24 deletions(-)