[PATCH v4 2/3] dax: Add a wakeup mode parameter to put_unlocked_entry()

As of now put_unlocked_entry() always wakes up next waiter. In next patches we want to wake up all waiters at one callsite. Hence, add a parameter to the function. This patch does not introduce any change of behavior. Reviewed-by: Greg Kurz Reviewed-by: Jan Kara Suggested-by: Dan Williams

[PATCH v4 1/3] dax: Add an enum for specifying dax wakup mode

Dan mentioned that he is not very fond of passing around a boolean true/false to specify if only next waiter should be woken up or all waiters should be woken up. He instead prefers that we introduce an enum and make it very explicity at the callsite itself. Easier to read code. This patch should

[PATCH v4 3/3] dax: Wake up all waiters after invalidating dax entry

I am seeing missed wakeups which ultimately lead to a deadlock when I am using virtiofs with DAX enabled and running "make -j". I had to mount virtiofs as rootfs and also reduce to dax window size to 256M to reproduce the problem consistently. So here is the problem. put_unlocked_entry() wakes up

[PATCH v4 0/3] dax: Fix missed wakeup in put_unlocked_entry()

Hi, This is V4 of the patches. Posted V3 here. https://lore.kernel.org/linux-fsdevel/20210419213636.1514816-1-vgo...@redhat.com/ Changes since V3 are. - Renamed "enum dax_entry_wake_mode" to "enum dax_wake_mode" (Matthew Wilcox) - Changed description of WAKE_NEXT and WAKE_ALL (Jan Kara) - Got

Re: [PATCH v4 0/3] dax: Fix missed wakeup in put_unlocked_entry()

On Fri, Apr 23, 2021 at 6:07 AM Vivek Goyal wrote: > > Hi, > > This is V4 of the patches. Posted V3 here. > > https://lore.kernel.org/linux-fsdevel/20210419213636.1514816-1-vgo...@redhat.com/ > > Changes since V3 are. > > - Renamed "enum dax_entry_wake_mode" to "enum dax_wake_mode" (Matthew

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Re: [PATCH v1 01/11] memory-failure: fetch compound_head after pgmap_pfn_valid()

On Thu, Mar 25, 2021 at 4:10 PM Joao Martins wrote: > > memory_failure_dev_pagemap() at the moment assumes base pages (e.g. > dax_lock_page()). For pagemap with compound pages fetch the > compound_head in case we are handling a tail page memory failure. > > Currently this is a nop, but in the

Re: [PATCH v1 03/11] mm/page_alloc: refactor memmap_init_zone_device() page init

On Thu, Mar 25, 2021 at 4:10 PM Joao Martins wrote: > > Move struct page init to an helper function __init_zone_device_page(). Same sentence addition suggestion from the last patch to make this patch have some rationale for existing. > > Signed-off-by: Joao Martins > --- > mm/page_alloc.c |

Re: [PATCH v1 02/11] mm/page_alloc: split prep_compound_page into head and tail subparts

On Thu, Mar 25, 2021 at 4:10 PM Joao Martins wrote: > > Split the utility function prep_compound_page() into head and tail > counterparts, and use them accordingly. To make this patch stand alone better lets add another sentence: "This is in preparation for sharing the storage for /

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