linux-kernel - Re: [PATCH v10 20/33] mm/filemap: Add folio_lock

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Message-ID: <c30ba5bd-0e7e-46d4-f093-586b912a68ea@suse.cz>
Date:   Tue, 18 May 2021 12:31:50 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        akpm@...ux-foundation.org
Cc:     linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Jeff Layton <jlayton@...nel.org>
Subject: Re: [PATCH v10 20/33] mm/filemap: Add folio_lock_killable

On 5/11/21 11:47 PM, Matthew Wilcox (Oracle) wrote:
> This is like lock_page_killable() but for use by callers who
> know they have a folio.  Convert __lock_page_killable() to be
> __folio_lock_killable().  This saves one call to compound_head() per
> contended call to lock_page_killable().
> 
> __folio_lock_killable() is 20 bytes smaller than __lock_page_killable()
> was.  lock_page_maybe_drop_mmap() shrinks by 68 bytes and
> __lock_page_or_retry() shrinks by 66 bytes.  That's a total of 154 bytes
> of text saved.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
> Reviewed-by: Christoph Hellwig <hch@....de>
> Acked-by: Jeff Layton <jlayton@...nel.org>


Acked-by: Vlastimil Babka <vbabka@...e.cz>