[lustre-devel] [PATCH 1/3] lustre: use generic_error_remove_page()
NeilBrown
neilb at suse.com
Sun Jun 24 18:57:06 PDT 2018
On Sun, Jun 24 2018, Oleg Drokin wrote:
>> On Jun 24, 2018, at 8:02 PM, NeilBrown <neilb at suse.com> wrote:
>>
>>
>> lustre's internal ll_invalidate_page() is behaviourally identical to
>> generic_error_remove_page().
>> In the case of lustre it isn't a memory hardware error that requires
>> the page being invalidated, it is the loss of a lock, which will like
>> result in the data changing on the server.
>> In either case, we don't want the page to be accessed any more, so the
>> same removal is appropriate.
>>
>> Signed-off-by: NeilBrown <neilb at suse.com>
>> ---
>>
>> I've replaced
>> [PATCH 08/24] lustre: use truncate_inode_page in place of truncate_complete_page
>> with 3 patches, this and the next two.
>
> This looks reasonable. Are you running any tests on this?
Just the sanity tests on a 4-node vcluster. They haven't caused any
noticeable regressions.
>
> Acked-by: Oleg Drokin <green at linuxhacker.ru>
Thanks,
NeilBrown
>
>>
>> Thanks,
>> NeilBrown
>>
>>
>> drivers/staging/lustre/lustre/llite/llite_internal.h | 17 -----------------
>> drivers/staging/lustre/lustre/llite/vvp_io.c | 2 +-
>> drivers/staging/lustre/lustre/llite/vvp_page.c | 2 +-
>> 3 files changed, 2 insertions(+), 19 deletions(-)
>>
>> diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h
>> index c08a6e14b6d7..22dcabf6de0f 100644
>> --- a/drivers/staging/lustre/lustre/llite/llite_internal.h
>> +++ b/drivers/staging/lustre/lustre/llite/llite_internal.h
>> @@ -928,23 +928,6 @@ void policy_from_vma(union ldlm_policy_data *policy, struct vm_area_struct *vma,
>> struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
>> size_t count);
>>
>> -static inline void ll_invalidate_page(struct page *vmpage)
>> -{
>> - struct address_space *mapping = vmpage->mapping;
>> - loff_t offset = vmpage->index << PAGE_SHIFT;
>> -
>> - LASSERT(PageLocked(vmpage));
>> - if (!mapping)
>> - return;
>> -
>> - /*
>> - * truncate_complete_page() calls
>> - * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
>> - */
>> - ll_teardown_mmaps(mapping, offset, offset + PAGE_SIZE);
>> - truncate_complete_page(mapping, vmpage);
>> -}
>> -
>> #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi)
>>
>> /* don't need an addref as the sb_info should be holding one */
>> diff --git a/drivers/staging/lustre/lustre/llite/vvp_io.c b/drivers/staging/lustre/lustre/llite/vvp_io.c
>> index e7a4778e02e4..5a67955974ad 100644
>> --- a/drivers/staging/lustre/lustre/llite/vvp_io.c
>> +++ b/drivers/staging/lustre/lustre/llite/vvp_io.c
>> @@ -1098,7 +1098,7 @@ static int vvp_io_fault_start(const struct lu_env *env,
>> LASSERT(PageLocked(vmpage));
>>
>> if (OBD_FAIL_CHECK(OBD_FAIL_LLITE_FAULT_TRUNC_RACE))
>> - ll_invalidate_page(vmpage);
>> + generic_error_remove_page(vmpage->mapping, vmpage);
>>
>> size = i_size_read(inode);
>> /* Though we have already held a cl_lock upon this page, but
>> diff --git a/drivers/staging/lustre/lustre/llite/vvp_page.c b/drivers/staging/lustre/lustre/llite/vvp_page.c
>> index 6eb0565ddc22..dcc4d8faa0cd 100644
>> --- a/drivers/staging/lustre/lustre/llite/vvp_page.c
>> +++ b/drivers/staging/lustre/lustre/llite/vvp_page.c
>> @@ -147,7 +147,7 @@ static void vvp_page_discard(const struct lu_env *env,
>> if (vpg->vpg_defer_uptodate && !vpg->vpg_ra_used)
>> ll_ra_stats_inc(vmpage->mapping->host, RA_STAT_DISCARDED);
>>
>> - ll_invalidate_page(vmpage);
>> + generic_error_remove_page(vmpage->mapping, vmpage);
>> }
>>
>> static void vvp_page_delete(const struct lu_env *env,
>> --
>> 2.14.0.rc0.dirty
>>
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