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| author |   Eugene Syromiatnikov <esyr@redhat.com> | 2021-09-13 17:44:15 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-09-13 10:38:13 -0600 |
| commit | dd47c104533dedb90434a3f142e94a671ac623a6 (patch) | |
| tree | 597759bca1e33f1c6ca7d1808be3e72e041db07e /fs/io-wq.c | |
| parent | io-wq: fix potential race of acct->nr_workers (diff) | |
| download | wireguard-linux-dd47c104533dedb90434a3f142e94a671ac623a6.tar.xz wireguard-linux-dd47c104533dedb90434a3f142e94a671ac623a6.zip | |
io-wq: provide IO_WQ_* constants for IORING_REGISTER_IOWQ_MAX_WORKERS arg items
The items passed in the array pointed by the arg parameter
of IORING_REGISTER_IOWQ_MAX_WORKERS io_uring_register operation
carry certain semantics: they refer to different io-wq worker categories;
provide IO_WQ_* constants in the UAPI, so these categories can be referenced
in the user space code.
Suggested-by: Jens Axboe <axboe@kernel.dk>
Complements: 2e480058ddc21ec5 ("io-wq: provide a way to limit max number of workers")
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Link: https://lore.kernel.org/r/20210913154415.GA12890@asgard.redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io-wq.c')
| -rw-r--r-- | fs/io-wq.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/io-wq.c b/fs/io-wq.c index 3d4460df845c..c2e0e8e80949 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -14,6 +14,7 @@ #include <linux/rculist_nulls.h> #include <linux/cpu.h> #include <linux/tracehook.h> +#include <uapi/linux/io_uring.h> #include "io-wq.h" @@ -1281,6 +1282,10 @@ int io_wq_max_workers(struct io_wq *wq, int *new_count) { int i, node, prev = 0; + BUILD_BUG_ON((int) IO_WQ_ACCT_BOUND != (int) IO_WQ_BOUND); + BUILD_BUG_ON((int) IO_WQ_ACCT_UNBOUND != (int) IO_WQ_UNBOUND); + BUILD_BUG_ON((int) IO_WQ_ACCT_NR != 2); + for (i = 0; i < 2; i++) { if (new_count[i] > task_rlimit(current, RLIMIT_NPROC)) new_count[i] = task_rlimit(current, RLIMIT_NPROC); |