From: Sergey Senozhatsky <senozhatsky@chromium.org>
To: Alexey Romanov <avromanov@sberdevices.ru>
Cc: minchan@kernel.org, senozhatsky@chromium.org,
akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, kernel@sberdevices.ru
Subject: Re: [PATCH v1 1/2] zsmalloc: add allocated objects counter for subpage
Date: Tue, 20 Jun 2023 19:36:29 +0900 [thread overview]
Message-ID: <20230620103629.GA42985@google.com> (raw)
In-Reply-To: <20230619143506.45253-2-avromanov@sberdevices.ru>
On (23/06/19 17:35), Alexey Romanov wrote:
>
> We use a variable of type unsigned int to store the offset
> of the first object at the subpage In turn, the offset cannot
> exceed the size of PAGE_SIZE, which is usually 4096. Thus,
> 12 bits are enough to store the offset.
[..]
> If the page size is 4Kb
It's certainly not a given. PAGE_SIZE is architecture specific.
PAGE_SIZE_16KB and PAGE_SIZE_64KB would be simple examples, but there
are, apparently, architectures that even can have PAGE_SIZE_256KB.
next prev parent reply other threads:[~2023-06-20 10:36 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-19 14:35 [PATCH v1 0/2] Add obj allocated counter for subpages Alexey Romanov
2023-06-19 14:35 ` [PATCH v1 1/2] zsmalloc: add allocated objects counter for subpage Alexey Romanov
2023-06-20 10:36 ` Sergey Senozhatsky [this message]
2023-06-20 11:16 ` Alexey Romanov
2023-06-21 13:17 ` Sergey Senozhatsky
2023-06-21 13:41 ` Alexey Romanov
2023-06-21 13:55 ` Sergey Senozhatsky
2023-06-21 13:59 ` Alexey Romanov
2023-06-21 14:18 ` Sergey Senozhatsky
2023-06-19 14:35 ` [PATCH v1 2/2] zsmalloc: check empty page in find_alloced_obj Alexey Romanov
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