Re: [PATCH v2 02/12] btrfs: implement a nowait option for tree searches

Stefan Roesch
2022-09-08T18:05:24Z

On 9/8/22 6:19 AM, Josef Bacik wrote:
> >
> On Wed, Sep 07, 2022 at 05:26:06PM -0700, Stefan Roesch wrote:
>> From: Josef Bacik <josef@toxicpanda.com>
>>
>> For NOWAIT IOCB's we'll need a way to tell search to not wait on locks
>> or anything. Accomplish this by adding a path->nowait flag that will
>> use trylocks and skip reading of metadata, returning -EWOULDBLOCK in
>> either of these cases. For now we only need this for reads, so only the
>> read side is handled. Add an ASSERT() to catch anybody trying to use
>> this for writes so they know they'll have to implement the write side.
>>
>> Signed-off-by: Josef Bacik <josef@toxicpanda.com>
>> Signed-off-by: Stefan Roesch <shr@fb.com>
>
> Should update my changelog to say use -EAGAIN instead of -EWOULDBLOCK. Thanks,
>

The next version will have that change.

> Josef