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Re: [PATCH 3/5] gzip: refactor state tracking
- To: Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 18 Apr 2024 05:13:04 -0400
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- Cc: Jason Andryuk <jason.andryuk@xxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 18 Apr 2024 09:13:23 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 4/18/24 03:36, Jan Beulich wrote:
On 11.04.2024 21:24, Andrew Cooper wrote:
On 11/04/2024 4:25 pm, Daniel P. Smith wrote:
diff --git a/xen/common/gzip/gunzip.c b/xen/common/gzip/gunzip.c
index 1bcb007395ba..9b4891731b8b 100644
--- a/xen/common/gzip/gunzip.c
+++ b/xen/common/gzip/gunzip.c
@@ -102,12 +109,13 @@ __init int gzip_check(char *image, unsigned long
image_len)
__init int perform_gunzip(char *output, char *image, unsigned long image_len)
{
+ struct gzip_data gd;
int rc;
By the end of this series,
Reading symbols from xen-syms...
(gdb) p sizeof(struct gzip_data)
$1 = 2120
x86 has an 8k stack and this takes 1/4 of it. Other bits of state are
dynamically allocated, even in inflate.c, so I'd highly recommend doing
the same for this.
Also, could I nitpick the name and request:
struct gzip_state *s;
Except: Why "gzip" when it's un-zipping state?
Gzip is the name of the algo/suite for which the code is moved under,
and in typical fashion its structures are named after the feature they
belong. Still, I went and looked at the other algos. I found two that
have state tracking and yes, they do use the operation for the struct
name and not the algo/feature under which they reside. If you want this
yak shaved, I have no vested interest one way or another, I just need
the decompressor to be re-entrant.
v/r,
dps
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