search for: page_clear_dirty

.... For potential volatile pages there is one more pitfall. The transfer of the hardware dirty bit to the software dirty bit needs to make sure that the page gets into the stable state before the hardware dirty bit is cleared. The primitive page_test_and_clear_dirty is split into page_test_dirty and page_clear_dirty to be able to place a page_make_stable call between them. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> --- arch/s390/Kconfig | 5 ++ arch/s390/kernel/traps.c | 4 ++ arch/s390/mm/fault.c | 73 +++++++++++++++++++++++++++++++++++++++++ incl...

.... For potential volatile pages there is one more pitfall. The transfer of the hardware dirty bit to the software dirty bit needs to make sure that the page gets into the stable state before the hardware dirty bit is cleared. The primitive page_test_and_clear_dirty is split into page_test_dirty and page_clear_dirty to be able to place a page_make_stable call between them. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> --- arch/s390/Kconfig | 5 ++ arch/s390/kernel/traps.c | 4 ++ arch/s390/mm/fault.c | 73 +++++++++++++++++++++++++++++++++++++++++ incl...

...+#ifdef CONFIG_PGSTE + unsigned long ret; + + ret = *(unsigned long *) (ptep + PTRS_PER_PTE); + *(unsigned long *) (ptep + PTRS_PER_PTE) &= ~val; + return (ret & val) == val; +#else + return 0; +#endif +} + + +/* forward declaration for SetPageUptodate in page-flags.h*/ +static inline void page_clear_dirty(struct page *page); +#include <linux/page-flags.h> + +static inline void ptep_rcp_copy(pte_t *ptep) +{ +#ifdef CONFIG_PGSTE + struct page *page = virt_to_page(pte_val(*ptep)); + unsigned int skey; + + skey = page_get_storage_key(page_to_phys(page)); + if (skey & _PAGE_CHANGED) + rcp_set_...

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git