The purpose of yaffs_hold_space() is to support the write_begin VFS method.
write_begin asks the file system to commit enough space to do the actual
write in write_end.
Strictly speaking this should really be handled with counter of committed
space that is incremented on every write_begin and decremented on every
write_end.
However, it is workable to just not expect there to be more than n writes
in progress at a time. n=20 seems rather conservative.
-- Charles
On Thu, Jul 30, 2015 at 3:04 PM, chenjie <
chenjie6@huawei.com> wrote:
>
> Hi:
> why the yaffs_hold_space reserved 20 chunk?
> return (n_free_chunks > 20) ? 1 : 0;
>
>
>
>
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