I want to work with large (1-10G) files in memory but eventually sync them back
out to disk. The problem is that the sync process appears to lock the file in
kernel for the duration of the sync, which can run into minutes. This prevents
other processes from reading from the file (unless they al
On Wednesday, October 17, 2012 7:20:56 am Andriy Gapon wrote:
>
> _mtx_lock_spin has the following check in its retry loop:
> if (i < 6000 || kdb_active || panicstr != NULL)
> DELAY(1);
> else
> _mtx_lock_spin_failed(m);
>
> Which means that in the (!kdb_active && panicstr ==
on 17/10/2012 15:07 m...@freebsd.org said the following:
> On Wed, Oct 17, 2012 at 4:20 AM, Andriy Gapon wrote:
>>
>> _mtx_lock_spin has the following check in its retry loop:
>> if (i < 6000 || kdb_active || panicstr != NULL)
>> DELAY(1);
>> else
>> _mtx_lock_spin_failed(m);
>
On Wed, Oct 17, 2012 at 4:20 AM, Andriy Gapon wrote:
>
> _mtx_lock_spin has the following check in its retry loop:
> if (i < 6000 || kdb_active || panicstr != NULL)
> DELAY(1);
> else
> _mtx_lock_spin_failed(m);
>
[snip analysis]
>
> So I'd like to propose to remove those check
_mtx_lock_spin has the following check in its retry loop:
if (i < 6000 || kdb_active || panicstr != NULL)
DELAY(1);
else
_mtx_lock_spin_failed(m);
Which means that in the (!kdb_active && panicstr == NULL) case we will make at
most 6000 iterations and then call _mtx_lock_sp
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