diff options
| author | Huang Jianan <huangjianan@oppo.com> | 2021-03-17 06:54:47 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@redhat.com> | 2021-03-29 05:18:00 +0300 |
| commit | 648f2de053a882c87c05f0060f47d3b11841fdbe (patch) | |
| tree | e3e9cde207e24544f3d27d51c631ab82928477f0 /fs/erofs | |
| parent | b4892fa3e7fd69e78a82356de45b90758589cafc (diff) | |
| download | linux-648f2de053a882c87c05f0060f47d3b11841fdbe.tar.xz | |
erofs: use workqueue decompression for atomic contexts only
z_erofs_decompressqueue_endio may not be executed in the atomic
context, for example, when dm-verity is turned on. In this scenario,
data can be decompressed directly to get rid of additional kworker
scheduling overhead.
Link: https://lore.kernel.org/r/20210317035448.13921-2-huangjianan@oppo.com
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Guo Weichao <guoweichao@oppo.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Diffstat (limited to 'fs/erofs')
| -rw-r--r-- | fs/erofs/zdata.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index 3851e1a64f73..9530b611f94b 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -706,6 +706,7 @@ err_out: goto out; } +static void z_erofs_decompressqueue_work(struct work_struct *work); static void z_erofs_decompress_kickoff(struct z_erofs_decompressqueue *io, bool sync, int bios) { @@ -720,8 +721,14 @@ static void z_erofs_decompress_kickoff(struct z_erofs_decompressqueue *io, return; } - if (!atomic_add_return(bios, &io->pending_bios)) + if (atomic_add_return(bios, &io->pending_bios)) + return; + /* Use workqueue decompression for atomic contexts only */ + if (in_atomic() || irqs_disabled()) { queue_work(z_erofs_workqueue, &io->u.work); + return; + } + z_erofs_decompressqueue_work(&io->u.work); } static bool z_erofs_page_is_invalidated(struct page *page) |