From: Sergey Senozhatsky <senozhatsky@chromium.org>
To: Barry Song <baohua@kernel.org>
Cc: Bo Zhang <zhangbo0325@gmail.com>,
senozhatsky@chromium.org, akpm@linux-foundation.org,
bgeffon@google.com, minchan@kernel.org, richardycc@google.com,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH v3 10/11] zram: use rw_semaphore for decompression streams
Date: Thu, 15 Oct 2026 11:04:03 +0900 [thread overview]
Message-ID: <atAzS6mTZQ80tTHM@google.com> (raw)
In-Reply-To: <CAGsJ_4wuPCPR0DnbrLp7ebdO=Oih6K_yP4XxwETKQ+3U+THVjg@mail.gmail.com>
On (26/10/15 04:46), Barry Song wrote:
> Also, with either deflate or zstd, create_dctx() will
> always be present. So, what algorithm are we actually testing?
> What happens if we switch to zstd?
Right. Am not that concerned with deflate, but seeing zstd on that
list is a tad sad. zstd mutates decompression ctx, so it cannot be
shared. On the other hand, zstd_dctx_workspace_bound() is almost
100KB so allocating dctx per-read request will be rather problematic.
next prev parent reply other threads:[~2026-10-15 2:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-13 3:50 [PATCH v3 00/11] zram: redesign zcomp and rework backends Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 01/11] zram: prefix backends printk-s Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 02/11] zram: remove debugfs entry on init failure Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 03/11] zram: zstd: do not allocate empty C/D-dictionaries Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 04/11] zram: lz4hc: pre-initialize dictionary stream in setup_params Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 05/11] zram: lz4: use LZ4_decompress_safe_usingDict() Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 06/11] zram: lz4hc: " Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 07/11] zram: zstd: do not use kvzalloc() for zstd allocations Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 08/11] zram: reset writeback state in zram_reset_device() Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 09/11] zram: split zcomp into separate R/W streams Sergey Senozhatsky
2026-10-13 3:50 ` [PATCH v3 10/11] zram: use rw_semaphore for decompression streams Sergey Senozhatsky
2026-10-14 15:36 ` Bo Zhang
2026-10-14 20:46 ` Barry Song
2026-10-15 2:04 ` Sergey Senozhatsky [this message]
2026-10-15 3:19 ` Bo Zhang
2026-10-15 3:24 ` Sergey Senozhatsky
2026-10-15 1:41 ` Sergey Senozhatsky
2026-10-15 2:11 ` Sergey Senozhatsky
2026-10-15 3:19 ` Sergey Senozhatsky
2026-10-15 5:18 ` Sergey Senozhatsky
2026-10-15 11:24 ` Bo Zhang
2026-10-13 3:50 ` [PATCH v3 11/11] zram: use a singleton compression context for recompression Sergey Senozhatsky
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