From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D8AF21A680C; Wed, 1 Apr 2026 00:51:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775004687; cv=none; b=aZe4zUKLrswAe9G0+AQe6SunCMq8Vup0lFww8mLjJqw+sBtkZWtNl9nNH8MvLj2PjXbEQ1I6QICLUBdwbG1q9qYjyaIpzsGzaJkhNRGGFivBh91rFoeguCTXw2kizI369DJW1b/KcrkumbItWSH9jYbW/Uu9NuEqEsPD+sfBZ3k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775004687; c=relaxed/simple; bh=Wgdz3xYKlehHKVBY3fmAzF+m8mJLRi95jqHsmPjUd5s=; h=Date:To:From:Subject:Message-Id; b=ShrVt+WwjdTHoTUYkqv44mLbwOS9oZkmpTvhNQsISCU2/ndXQOjZRpYqmaYRan5Mh4wipLGpvPtzceDKUSYProq7o+NZQuJPcRk4/r8Nc+G9xFOgaShKS+C2Uh1Y8eLg0pwDlE2Gj20+1w/lcrEfXu5JXvjMv1RdpDwdcqvZ2f8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=W+zXSnpD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="W+zXSnpD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6C91CC19423; Wed, 1 Apr 2026 00:51:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1775004687; bh=Wgdz3xYKlehHKVBY3fmAzF+m8mJLRi95jqHsmPjUd5s=; h=Date:To:From:Subject:From; b=W+zXSnpD4rvQQ0wVs2UCIuE6AtZYvy2kmiMrwUxoQj5j17TWjJWpI2uUnYya5E07p qilmXv42DMjO5ppQ/mpUuzPg7E3ajmMG2km3Dz+9reCKfI4nCn3AfvicJg023l0Gry 2syaDpvtZGHh01OqBbuw0/rbkfo9z/1itRSFuqwM= Date: Tue, 31 Mar 2026 17:51:26 -0700 To: mm-commits@vger.kernel.org,wqu@suse.com,stable@vger.kernel.org,minchan@kernel.org,hch@lst.de,bgeffon@google.com,axboe@kernel.dk,avinesh.kumar@suse.com,senozhatsky@chromium.org,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] zram-do-not-forget-to-endio-for-partial-discard-requests.patch removed from -mm tree Message-Id: <20260401005127.6C91CC19423@smtp.kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: zram: do not forget to endio for partial discard requests has been removed from the -mm tree. Its filename was zram-do-not-forget-to-endio-for-partial-discard-requests.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: Sergey Senozhatsky Subject: zram: do not forget to endio for partial discard requests Date: Tue, 31 Mar 2026 16:42:44 +0900 As reported by Qu Wenruo and Avinesh Kumar, the following getconf PAGESIZE 65536 blkdiscard -p 4k /dev/zram0 takes literally forever to complete. zram doesn't support partial discards and just returns immediately w/o doing any discard work in such cases. The problem is that we forget to endio on our way out, so blkdiscard sleeps forever in submit_bio_wait(). Fix this by jumping to end_bio label, which does bio_endio(). Link: https://lkml.kernel.org/r/20260331074255.777019-1-senozhatsky@chromium.org Fixes: 0120dd6e4e202 ("zram: make zram_bio_discard more self-contained") Signed-off-by: Sergey Senozhatsky Reported-by: Qu Wenruo Closes: https://lore.kernel.org/linux-block/92361cd3-fb8b-482e-bc89-15ff1acb9a59@suse.com Tested-by: Qu Wenruo Reported-by: Avinesh Kumar Closes: https://bugzilla.suse.com/show_bug.cgi?id=1256530 Reviewed-by: Christoph Hellwig Cc: Brian Geffon Cc: Jens Axboe Cc: Minchan Kim Cc: Signed-off-by: Andrew Morton --- drivers/block/zram/zram_drv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/block/zram/zram_drv.c~zram-do-not-forget-to-endio-for-partial-discard-requests +++ a/drivers/block/zram/zram_drv.c @@ -2678,7 +2678,7 @@ static void zram_bio_discard(struct zram */ if (offset) { if (n <= (PAGE_SIZE - offset)) - return; + goto end_bio; n -= (PAGE_SIZE - offset); index++; @@ -2693,6 +2693,7 @@ static void zram_bio_discard(struct zram n -= PAGE_SIZE; } +end_bio: bio_endio(bio); } _ Patches currently in -mm which might be from senozhatsky@chromium.org are