Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
On Mon, 2005-08-08 at 22:24 +0500, Fawad Lateef wrote: > Dear Arjan, > > On 8/8/05, Arjan van de Ven <[EMAIL PROTECTED]> wrote: > > > > 1) you probably should use RH support for this > > 2) you forgot to attach your sourcecode / URL to that, including the > >full source of your module. > > > > I already mentioned my code and some details in my previous mail on > the list No you didn't; you didn't post the module only a rough description of what you changed the module is the part that uses this stuff (and since it needs core kernel changes, is required to be GPL so I see no problem posting a URL to it) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
Dear Arjan, On 8/8/05, Arjan van de Ven <[EMAIL PROTECTED]> wrote: > > 1) you probably should use RH support for this > 2) you forgot to attach your sourcecode / URL to that, including the >full source of your module. > I already mentioned my code and some details in my previous mail on the list Can u check and help me out or I hav to send that again And as far as Redhat Support concerns that problem is not related to Redhat because I reserved memory by placing the code in the arch/i386/mm/init.c file in one_highpage_init function not through mem= option of the kernel .. Waiting for your response and help . -- Fawad Lateef - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
On Mon, 2005-08-08 at 08:50 +0500, Fawad Lateef wrote: > Hello, > > I m facing a problem in RHEL3 (2.4.21-5.ELsmp) kernel while using > kmap_atomic on the pages reserved at the boot time > > At the boot time I reserved pages above 2GB for later use by my module > . And when I was using those reserved pages through kmap_atomic > system hangs; although kmap_atomic successfully returns me the virtual > address but when I use that virtual address like in memcpy the system > hangs . 1) you probably should use RH support for this 2) you forgot to attach your sourcecode / URL to that, including the full source of your module. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
Fawad Lateef wrote:
if ((unsigned long)(page - mem_map) > 0x8) {
SetPageReserved(page);
set_bit(PG_highmem, >flags);
atomic_set(>count, 0xC4);
That seems like a hackish thing to do. Could you mistake other pages
with the same count as pages you have reserved?
After this in my module, i simply use kmap_atomic to map the page
reserved by me and tried to use that its working perfect in
both 2.4.x series and also working in 2.6.x .
This suggests a problem with RHEL3. If it works fine on a vanilla 2.4
kernel, then by all means try to get support from your vendor. If it
works fine on the latest 2.4.X and 2.6.X linux-kernel is probably not
the best place to look for help, although I can't blame you for trying.
Maybe someone here already knows the answer, but unfortunately, it is
not me.
Sorry if I missed context from your earlier posts.
Zach
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
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Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
On 8/8/05, Zachary Amsden <[EMAIL PROTECTED]> wrote:
>
> IIRC 2.4.21 has some highmem bugs that have since been fixed. But, it
> sounds like you might be doing something quite unusual. Code would
> definitely give people a better idea of what might be wrong.
I think you overlooked what i mentioned in P.S. ; which is
My memory reservation and later using that memory through kmap_atomic
works well on the kernels other than RHEL3 2.4.21-e.ELsmp
.. the page reservation was done in the
arch/i386/mm/init.c file in function one_highpage_init .. I have
Machine with 16GB RAM and 2 - Xeon 2.4GHz Processors .
The code which I added for memory reservation in kernel is :
void __init one_highpage_init(struct page *page, int pfn, int bad_ppro)
{
if (!page_is_ram(pfn)) {
SetPageReserved(page);
return;
}
if (bad_ppro && page_kills_ppro(pfn)) {
SetPageReserved(page);
return;
}
// Here's the code which i added for memory reservation . i m
setting 0xC4 in page->count just because i will know later that these
pages have been reserved by me ... not by kernel .
if ((unsigned long)(page - mem_map) > 0x8) {
SetPageReserved(page);
set_bit(PG_highmem, >flags);
atomic_set(>count, 0xC4);
totalhigh_pages++;
return;
}
// My code Ends here
ClearPageReserved(page);
set_bit(PG_highmem, >flags);
atomic_set(>count, 1);
__free_page(page);
totalhigh_pages++;
}
After this in my module, i simply use kmap_atomic to map the page
reserved by me and tried to use that its working perfect in
both 2.4.x series and also working in 2.6.x .
> You should definitely consider moving to 2.6 to get a better response.
>
i already moved to 2.6.x already !!! but the current requiment is to
use RHEL3 Kernel which is 2.4.21-27.ELsmp
I think its now more clear waiting for your resposes !!!
--
Fawad Lateef
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
On 8/8/05, Zachary Amsden [EMAIL PROTECTED] wrote:
IIRC 2.4.21 has some highmem bugs that have since been fixed. But, it
sounds like you might be doing something quite unusual. Code would
definitely give people a better idea of what might be wrong.
I think you overlooked what i mentioned in P.S. ; which is
My memory reservation and later using that memory through kmap_atomic
works well on the kernels other than RHEL3 2.4.21-e.ELsmp
.. the page reservation was done in the
arch/i386/mm/init.c file in function one_highpage_init .. I have
Machine with 16GB RAM and 2 - Xeon 2.4GHz Processors .
The code which I added for memory reservation in kernel is :
void __init one_highpage_init(struct page *page, int pfn, int bad_ppro)
{
if (!page_is_ram(pfn)) {
SetPageReserved(page);
return;
}
if (bad_ppro page_kills_ppro(pfn)) {
SetPageReserved(page);
return;
}
// Here's the code which i added for memory reservation . i m
setting 0xC4 in page-count just because i will know later that these
pages have been reserved by me ... not by kernel .
if ((unsigned long)(page - mem_map) 0x8) {
SetPageReserved(page);
set_bit(PG_highmem, page-flags);
atomic_set(page-count, 0xC4);
totalhigh_pages++;
return;
}
// My code Ends here
ClearPageReserved(page);
set_bit(PG_highmem, page-flags);
atomic_set(page-count, 1);
__free_page(page);
totalhigh_pages++;
}
After this in my module, i simply use kmap_atomic to map the page
reserved by me and tried to use that its working perfect in
both 2.4.x series and also working in 2.6.x .
You should definitely consider moving to 2.6 to get a better response.
i already moved to 2.6.x already !!! but the current requiment is to
use RHEL3 Kernel which is 2.4.21-27.ELsmp
I think its now more clear waiting for your resposes !!!
--
Fawad Lateef
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
Fawad Lateef wrote:
if ((unsigned long)(page - mem_map) 0x8) {
SetPageReserved(page);
set_bit(PG_highmem, page-flags);
atomic_set(page-count, 0xC4);
That seems like a hackish thing to do. Could you mistake other pages
with the same count as pages you have reserved?
After this in my module, i simply use kmap_atomic to map the page
reserved by me and tried to use that its working perfect in
both 2.4.x series and also working in 2.6.x .
This suggests a problem with RHEL3. If it works fine on a vanilla 2.4
kernel, then by all means try to get support from your vendor. If it
works fine on the latest 2.4.X and 2.6.X linux-kernel is probably not
the best place to look for help, although I can't blame you for trying.
Maybe someone here already knows the answer, but unfortunately, it is
not me.
Sorry if I missed context from your earlier posts.
Zach
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
On Mon, 2005-08-08 at 08:50 +0500, Fawad Lateef wrote: Hello, I m facing a problem in RHEL3 (2.4.21-5.ELsmp) kernel while using kmap_atomic on the pages reserved at the boot time At the boot time I reserved pages above 2GB for later use by my module . And when I was using those reserved pages through kmap_atomic system hangs; although kmap_atomic successfully returns me the virtual address but when I use that virtual address like in memcpy the system hangs . 1) you probably should use RH support for this 2) you forgot to attach your sourcecode / URL to that, including the full source of your module. - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
Dear Arjan, On 8/8/05, Arjan van de Ven [EMAIL PROTECTED] wrote: 1) you probably should use RH support for this 2) you forgot to attach your sourcecode / URL to that, including the full source of your module. I already mentioned my code and some details in my previous mail on the list Can u check and help me out or I hav to send that again And as far as Redhat Support concerns that problem is not related to Redhat because I reserved memory by placing the code in the arch/i386/mm/init.c file in one_highpage_init function not through mem= option of the kernel .. Waiting for your response and help . -- Fawad Lateef - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
On Mon, 2005-08-08 at 22:24 +0500, Fawad Lateef wrote: Dear Arjan, On 8/8/05, Arjan van de Ven [EMAIL PROTECTED] wrote: 1) you probably should use RH support for this 2) you forgot to attach your sourcecode / URL to that, including the full source of your module. I already mentioned my code and some details in my previous mail on the list No you didn't; you didn't post the module only a rough description of what you changed the module is the part that uses this stuff (and since it needs core kernel changes, is required to be GPL so I see no problem posting a URL to it) - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
Fawad Lateef wrote: Hello, I m facing a problem in RHEL3 (2.4.21-5.ELsmp) kernel while using kmap_atomic on the pages reserved at the boot time At the boot time I reserved pages above 2GB for later use by my module . And when I was using those reserved pages through kmap_atomic system hangs; although kmap_atomic successfully returns me the virtual address but when I use that virtual address like in memcpy the system hangs . I m unable to findout why it is happening in RHEL3 kernel Plz help me in this regard IIRC 2.4.21 has some highmem bugs that have since been fixed. But, it sounds like you might be doing something quite unusual. Code would definitely give people a better idea of what might be wrong. You should definitely consider moving to 2.6 to get a better response. Zach - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
On 8/7/05, Fawad Lateef <[EMAIL PROTECTED]> wrote: > Hello, > > I m facing a problem in RHEL3 (2.4.21-5.ELsmp) kernel while using > kmap_atomic on the pages reserved at the boot time Unless you can reproduce this in a current kernel.org kernel (2.6.13-rc6), then you probably should contact RedHat for support. Thanks, Nish - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
Hello, I m facing a problem in RHEL3 (2.4.21-5.ELsmp) kernel while using kmap_atomic on the pages reserved at the boot time At the boot time I reserved pages above 2GB for later use by my module . And when I was using those reserved pages through kmap_atomic system hangs; although kmap_atomic successfully returns me the virtual address but when I use that virtual address like in memcpy the system hangs . I m unable to findout why it is happening in RHEL3 kernel Plz help me in this regard -- Fawad Lateef P.S. My memory reservation and later using that memory through kmap_atomic works well on the kernels other than RHEL3 2.4.21-e.ELsmp .. the page reservation was done in the arch/i386/mm/init.c file in function one_highpage_init .. I have Machine with 16GB RAM and 2 - Xeon 2.4GHz Processors . - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
Hello, I m facing a problem in RHEL3 (2.4.21-5.ELsmp) kernel while using kmap_atomic on the pages reserved at the boot time At the boot time I reserved pages above 2GB for later use by my module . And when I was using those reserved pages through kmap_atomic system hangs; although kmap_atomic successfully returns me the virtual address but when I use that virtual address like in memcpy the system hangs . I m unable to findout why it is happening in RHEL3 kernel Plz help me in this regard -- Fawad Lateef P.S. My memory reservation and later using that memory through kmap_atomic works well on the kernels other than RHEL3 2.4.21-e.ELsmp .. the page reservation was done in the arch/i386/mm/init.c file in function one_highpage_init .. I have Machine with 16GB RAM and 2 - Xeon 2.4GHz Processors . - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
On 8/7/05, Fawad Lateef [EMAIL PROTECTED] wrote: Hello, I m facing a problem in RHEL3 (2.4.21-5.ELsmp) kernel while using kmap_atomic on the pages reserved at the boot time Unless you can reproduce this in a current kernel.org kernel (2.6.13-rc6), then you probably should contact RedHat for support. Thanks, Nish - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Highmemory Problem with RHEL3 .... 2.4.21-5.ELsmp
Fawad Lateef wrote: Hello, I m facing a problem in RHEL3 (2.4.21-5.ELsmp) kernel while using kmap_atomic on the pages reserved at the boot time At the boot time I reserved pages above 2GB for later use by my module . And when I was using those reserved pages through kmap_atomic system hangs; although kmap_atomic successfully returns me the virtual address but when I use that virtual address like in memcpy the system hangs . I m unable to findout why it is happening in RHEL3 kernel Plz help me in this regard IIRC 2.4.21 has some highmem bugs that have since been fixed. But, it sounds like you might be doing something quite unusual. Code would definitely give people a better idea of what might be wrong. You should definitely consider moving to 2.6 to get a better response. Zach - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
