Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

> On 9 May 2018, at 11:27, Daniel Danzberger wrote: > > On 05/ >> >> >> So that smells more of a race condition between the writer filling with 0xFF >> and the reader catching up. > The open() syscall does the memset(0xff) and blocks. This ensures the memory > is >

Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

On 05/08/2018 10:33 PM, Kevin Darbyshire-Bryant wrote: > > >> On 8 May 2018, at 21:11, Rosen Penev wrote: >> >>> >>> So out of curiosity I built this for my Archer C7 v2 ar71xx device. I also >>> modified the code to not give up on ‘OK’, so it always iterated 10 times. >>>

Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

The sender domain has a DMARC Reject/Quarantine policy which disallows sending mailing list messages using the original "From" header. To mitigate this problem, the original message has been wrapped automatically by the mailing list software.--- Begin Message --- > On 8 May 2018, at 21:11,

Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

<ke...@darbyshire-bryant.me.uk> >> To: Daniel Danzberger <dan...@dd-wrt.com> >> Cc: Rosen Penev <ros...@gmail.com>, "lede-dev@lists.infradead.org" >> <lede-dev@lists.infradead.org> >> Bcc: >> Date: Tue, 8 May 2018 20:07:56 + >>

Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

os...@gmail.com>, "lede-dev@lists.infradead.org" > <lede-dev@lists.infradead.org> > Bcc: > Date: Tue, 8 May 2018 20:07:56 + > Subject: Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) > board. > > >> On 8 May 2018, at 11:16, Daniel

Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

The sender domain has a DMARC Reject/Quarantine policy which disallows sending mailing list messages using the original "From" header. To mitigate this problem, the original message has been wrapped automatically by the mailing list software.--- Begin Message --- > On 8 May 2018, at 11:16,

Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

On 05/07/2018 01:16 PM, Daniel Danzberger wrote: > On 05/06/2018 09:00 PM, Rosen Penev wrote: >> On Sun, May 6, 2018 at 10:08 AM, Rosen Penev wrote: >>> On Sun, May 6, 2018 at 3:52 AM, Daniel Danzberger wrote: MMAP'ed memory that has been allocated via

Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

On 05/06/2018 09:00 PM, Rosen Penev wrote: > On Sun, May 6, 2018 at 10:08 AM, Rosen Penev wrote: >> On Sun, May 6, 2018 at 3:52 AM, Daniel Danzberger wrote: >>> MMAP'ed memory that has been allocated via 'get_zeroed_page(GFP_KERNEL)' or >>> 'vmalloc()'

Re: [LEDE-DEV] MMAP memory out of sync on AR71xx Rambutan (8devices) board.

On Sun, May 6, 2018 at 3:52 AM, Daniel Danzberger wrote: > MMAP'ed memory that has been allocated via 'get_zeroed_page(GFP_KERNEL)' or > 'vmalloc()' doesn't always contain the same data when accessed from userspace. > > This means all userspace programs using mmap to access