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| author | Filipe Manana <fdmanana@suse.com> | 2024-12-09 16:43:44 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-01-02 10:30:55 +0100 |
| commit | bb8e287f596b62fac18ed84cc03a9f1752f6b3b8 (patch) | |
| tree | aae0271db23512510d8e407b529da5fc1dbfd076 | |
| parent | 6abbbd8286b6f944eecf3c74444c138590135211 (diff) | |
| download | linux-bb8e287f596b62fac18ed84cc03a9f1752f6b3b8.tar.gz linux-bb8e287f596b62fac18ed84cc03a9f1752f6b3b8.tar.bz2 linux-bb8e287f596b62fac18ed84cc03a9f1752f6b3b8.zip | |
btrfs: avoid monopolizing a core when activating a swap file
commit 2c8507c63f5498d4ee4af404a8e44ceae4345056 upstream.
During swap activation we iterate over the extents of a file and we can
have many thousands of them, so we can end up in a busy loop monopolizing
a core. Avoid this by doing a voluntary reschedule after processing each
extent.
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/btrfs/inode.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index eb5f03c3336c..16789490078f 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -7387,6 +7387,8 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, ret = -EAGAIN; goto out; } + + cond_resched(); } if (orig_start) |