On May 25 2022, Eric Blake wrote:
> On Tue, May 24, 2022 at 08:45:02PM +0100, Nikolaus Rath wrote:
>> > However, you are worried that a third possibility occurs:
>> >
>> > T2 sees that it needs to do RMW, grabs the lock, and reads 0x00-0x0f
>> > for the unaligned head (it only needs 0x00-0x03,
On Tue, May 24, 2022 at 08:45:02PM +0100, Nikolaus Rath wrote:
> > However, you are worried that a third possibility occurs:
> >
> > T2 sees that it needs to do RMW, grabs the lock, and reads 0x00-0x0f
> > for the unaligned head (it only needs 0x00-0x03, but we have to read a
> > block at a time),
On May 24 2022, Eric Blake wrote:
> minblock = 0x10
> Thread 1: receives write request for offset 0x00, size 0x10 (aligned request)
> Thread 2: receives write request for offset 0x04, size 0x16 (unaligned
> offset, unaligned size)
>
> Graphically, we are wanting to write the following, given
On Tue, May 24, 2022 at 09:01:28AM -0500, Eric Blake wrote:
> On Sat, May 21, 2022 at 01:21:11PM +0100, Nikolaus Rath wrote:
> > Hi,
> >
> > How does the blocksize filter take into account writes that end-up
> > overlapping due to read-modify-write cycles?
> >
> > Specifically, suppose there
On Sat, May 21, 2022 at 01:21:11PM +0100, Nikolaus Rath wrote:
> Hi,
>
> How does the blocksize filter take into account writes that end-up
> overlapping due to read-modify-write cycles?
>
> Specifically, suppose there are two non-overlapping writes handled by two
> different threads, that,
On Sat, May 21, 2022 at 05:37:10PM +0100, Nikolaus Rath wrote:
> On May 21 2022, "Richard W.M. Jones" wrote:
> > On Sat, May 21, 2022 at 01:21:11PM +0100, Nikolaus Rath wrote:
> >> Hi,
> >>
> >> How does the blocksize filter take into account writes that end-up
> >> overlapping due to
On May 21 2022, "Richard W.M. Jones" wrote:
> On Sat, May 21, 2022 at 01:21:11PM +0100, Nikolaus Rath wrote:
>> Hi,
>>
>> How does the blocksize filter take into account writes that end-up
>> overlapping due to read-modify-write cycles?
>>
>> Specifically, suppose there are two non-overlapping
On Sat, May 21, 2022 at 01:21:11PM +0100, Nikolaus Rath wrote:
> Hi,
>
> How does the blocksize filter take into account writes that end-up
> overlapping due to read-modify-write cycles?
>
> Specifically, suppose there are two non-overlapping writes handled
> by two different threads, that, due to
Hi,
How does the blocksize filter take into account writes that end-up overlapping
due to read-modify-write cycles?
Specifically, suppose there are two non-overlapping writes handled by two
different threads, that, due to blocksize requirements, overlap when expanded.
I think there is a risk
